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<meta name="keywords" content="C1847725, disease or syndrome, itpr1, sca15, sca15 spinocerebellar ataxia 15, sca15/16, sca16 (formerly), sca16, formerly, scar16, spinocerebellar ataxia 15, spinocerebellar ataxia 16, spinocerebellar ataxia 16 (formerly), spinocerebellar ataxia 16, formerly, spinocerebellar ataxia type 15, spinocerebellar ataxia type 15/16, spinocerebellar ataxia type 16, spinocerebellar ataxia type15, autosomal dominant, autosomal recessive, birth defects, chromosomal disease, chromosome, clinical features, clinical findings, clinical genetics, clinical recommendations, clinvar, congenital chromosomal disease, consumer genetic resources, cytogenetic location, disease characteristics, disease definitions, disease descriptions, disease ontology, disease synonyms, disease vocabulary, dysmorphology, entrez, familial disease, gene, gene-disease relationship, genereviews, genetic disease, genetic disorder, genetic terminology, genetic testing registry, genetics home reference, genomic disease, gtr, hereditary disease, heritable disease, hpo, human phenotype ontology, inherited disease, management guidelines, maternal inheritance, medgen, medical genetics, medical subject headings, mesh, mitochondrial inheritance, mode of inheritance, national center for biotechnology information, national institutes of health, national library of medicine, ncbi, nih, nlm, omim, ordo, orphanet, paternal inheritance, phenome, position statements, professional practice guidelines, rare disease, reference sequence, refseq, snomed ct, syndrome, undiagnosed diseases, x-linked recessive" /><meta name="description" content="Spinocerebellar ataxia-15 (SCA15) is an autosomal dominant, adult-onset, slowly progressive form of cerebellar ataxia. Most patients also have disabling action and postural tremor, and some have pyramidal tract affection, dorsal column involvement, and gaze palsy. Brain imaging shows cerebellar atrophy mainly affecting the vermis (summary by Synofzik et al., 2011).&#13; Autosomal dominant 'pure' cerebellar ataxia, classified as ADCA type III by Harding (1983, 1993), is a genetically heterogeneous disorder (see, e.g., 117210).&#13; For a general discussion of autosomal dominant spinocerebellar ataxia, see SCA1 (164400)." /><meta name="robots" content="index,nofollow,noarchive" />
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<title>Spinocerebellar ataxia type 15/16 (Concept Id: C1847725)
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<!--
UID=338301
ConceptID=C1847725
-->
<!--imgCountBooks = 1--><div class="ncbi_carousel" data-ncbicarousel-config="imageWidth:'100px',numItemsVisible:2,toggler:false"><div class="nc_header"><span class="img_strip_title">Image</span></div><div class="nc_content"><div class="nc_item"><a class="figpopup"><img alt="Image from GeneReviews" src="/books/NBK1138/bin/ataxias-Image001.gif" src-large="/books/NBK1138/bin/ataxias-Image001.jpg" /></a><br /><a href="/books/NBK1138/figure/ataxias.F1/" title="GeneReviews" target="_blank">details</a></div></div></div><h1 class="medgenTitle"><div class="MedGenTitleText">Spinocerebellar ataxia type 15/16<span class="h1sub">(SCA15)</span></div></h1><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>338301</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information."><span class="highlight" style="background-color:">C1847725</span></a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div><table class="medgenTable"><tbody><tr><td>Synonyms:</td>
<td>SCA15; SCA16 (formerly); Spinocerebellar ataxia 16 (formerly); Spinocerebellar Ataxia Type 15; Spinocerebellar Ataxia Type15</td></tr>
<tr><td><span class="bold">SNOMED CT: </span></td>
<td>Spinocerebellar ataxia type 15/16 (716724006)</td></tr>
<tr><td>Modes of inheritance:</td>
<td>
<div class="divPopper rprt" id="moi_141047"><div><strong>Autosomal dominant inheritance</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>141047</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0443147</a></dd><dt><span class="dotprefix"></span></dt><dd>Intellectual Product</dd></dl></div></div></div>
<div class="spaceAbove">Source: Orphanet</div>
<div class="spaceAbove">A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in heterozygotes. In the context of medical genetics, an autosomal dominant disorder is caused when a single copy of the mutant allele is present. Males and females are affected equally, and can both transmit the disorder with a risk of 50% for each child of inheriting the mutant allele.</div></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#moi_141047" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Autosomal dominant inheritance</a><span> (Orphanet)</span></div></td></tr>
<tr><td colspan="2" class="small"> </td></tr><tr><td><a class="help jig-ncbi-popper" data-jig="ncbipopper" href="#target-gene-loc">Gene (location):<img class="pulldown" src="//static.pubmed.gov/portal/portal3rc.fcgi/4223267/img/4204968" /></a><div class="display-none" id="target-gene-loc">
Gene(s) directly associated with<br />
this condition or phenotype.</div></td>
<td><a target="_blank" title="ITPR1 - ID: 3708 - NCBI Gene" href="/gene/3708" class="medgenPMinfo">ITPR1</a> (3p26.1)</td></tr>
<tr><td colspan="2" class="small"> </td></tr><tr><td>Monarch Initiative:</td>
<td><a href="https://monarchinitiative.org/disease/MONDO:0011694" target="_blank">MONDO:0011694</a></td></tr>
<tr><td>OMIM<span class="superscript">®</span>:</td>
<td><a href="https://omim.org/entry/606658" target="_blank">606658</a></td></tr>
<tr><td>Orphanet:</td>
<td><a target="_blank" title="Orphanet: The portal for rare diseases and orphan drugs" href="http://www.orpha.net/consor/cgi-bin/OC_Exp.php?lng=EN&amp;Expert=98769">ORPHA98769</a></td></tr></tbody></table></div><div class="rprt-body jig-ncbiinpagenav" data-jigconfig="smoothScroll: false, gotoTopLink: true, gotoTopLinkText: '', gotoTopLinkAttrs: {'title': 'Go to the top of the page'},allHeadingLevels: ['h1'], topOfPageTOC: true, tocId: 'my-toc'"><div id="rprt-tabs-1" class="rprt-tab"><div id="tb-termsProp-1"><div class="leftCol mgCol"><div>
<div class="portlet mgSection" id="ID_100">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Definition">Definition</h1><a sid="100" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln">Spinocerebellar ataxia-15 (SCA15) is an autosomal dominant, adult-onset, slowly progressive form of cerebellar ataxia. Most patients also have disabling action and postural tremor, and some have pyramidal tract affection, dorsal column involvement, and gaze palsy. Brain imaging shows cerebellar atrophy mainly affecting the vermis (summary by Synofzik et al., 2011).&#13; Autosomal dominant 'pure' cerebellar ataxia, classified as ADCA type III by Harding (1983, 1993), is a genetically heterogeneous disorder (see, e.g., 117210).&#13; For a general discussion of autosomal dominant spinocerebellar ataxia, see SCA1 (164400). [from <a title="Online Mendelian Inheritance in Man" href="http://www.omim.org" class="defSource" target="_blank">OMIM</a>]</div>
</div>
<div class="portlet mgSection" id="ID_102">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Clinical_features">Clinical features</h1><a sid="102" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln clinfeat"><strong>From HPO</strong><br />
<div class="divPopper rprt" id="clin_41440"><div><strong>Dysphagia</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>41440</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0011168</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Difficulty in swallowing.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/41440">Feature record</a> | <a href="/medgen?term=%22Dysphagia%22%5BClinical%20Features%5D%20OR%2041440%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_854"><div><strong>Cerebral palsy</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>854</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0007789</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Cerebral palsy describes a group of permanent disorders of the development of movement and posture, causing activity limitation, that are attributed to nonprogressive disturbances that occurred in the developing fetal or infant brain. The motor disorders of cerebral palsy are often accompanied by disturbances of sensation, perception, cognition, communication, and behavior, by epilepsy, and by secondary musculoskeletal problems.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/854">Feature record</a> | <a href="/medgen?term=%22Cerebral%20palsy%22%5BClinical%20Features%5D%20OR%20854%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_3420"><div><strong>Chorea</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>3420</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0008489</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Chorea (Greek for 'dance') refers to widespread arrhythmic involuntary movements of a forcible, jerky and restless fashion. It is a random-appearing sequence of one or more discrete involuntary movements or movement fragments. Movements appear random because of variability in timing, duration or location. Each movement may have a distinct start and end. However, movements may be strung together and thus may appear to flow randomly from one muscle group to another. Chorea can involve the trunk, neck, face, tongue, and extremities.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/3420">Feature record</a> | <a href="/medgen?term=%22Chorea%22%5BClinical%20Features%5D%20OR%203420%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_8510"><div><strong>Dysarthria</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>8510</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0013362</a></dd><dt><span class="dotprefix"></span></dt><dd>Mental or Behavioral Dysfunction</dd></dl></div></div></div>
<div class="spaceAbove">Dysarthric speech is a general description referring to a neurological speech disorder characterized by poor articulation. Depending on the involved neurological structures, dysarthria may be further classified as spastic, flaccid, ataxic, hyperkinetic and hypokinetic, or mixed.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/8510">Feature record</a> | <a href="/medgen?term=%22Dysarthria%22%5BClinical%20Features%5D%20OR%208510%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_8514"><div><strong>Dyskinesia</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>8514</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0013384</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">A movement disorder which consists of effects including diminished voluntary movements and the presence of involuntary movements.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/8514">Feature record</a> | <a href="/medgen?term=%22Dyskinesia%22%5BClinical%20Features%5D%20OR%208514%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_7753"><div><strong>Spasticity</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>7753</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0026838</a></dd><dt><span class="dotprefix"></span></dt><dd>Sign or Symptom</dd></dl></div></div></div>
<div class="spaceAbove">A motor disorder characterized by a velocity-dependent increase in tonic stretch reflexes with increased muscle tone, exaggerated (hyperexcitable) tendon reflexes.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/7753">Feature record</a> | <a href="/medgen?term=%22Spasticity%22%5BClinical%20Features%5D%20OR%207753%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_19708"><div><strong>Babinski sign</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>19708</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0034935</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Upturning of the big toe (and sometimes fanning of the other toes) in response to stimulation of the sole of the foot. If the Babinski sign is present it can indicate damage to the corticospinal tract.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/19708">Feature record</a> | <a href="/medgen?term=%22Babinski%20sign%22%5BClinical%20Features%5D%20OR%2019708%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_21635"><div><strong>Tremor</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>21635</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0040822</a></dd><dt><span class="dotprefix"></span></dt><dd>Sign or Symptom</dd></dl></div></div></div>
<div class="spaceAbove">An unintentional, oscillating to-and-fro muscle movement about a joint axis.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/21635">Feature record</a> | <a href="/medgen?term=%22Tremor%22%5BClinical%20Features%5D%20OR%2021635%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_57738"><div><strong>Hyperreflexia</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>57738</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0151889</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Hyperreflexia is the presence of hyperactive stretch reflexes of the muscles.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/57738">Feature record</a> | <a href="/medgen?term=%22Hyperreflexia%22%5BClinical%20Features%5D%20OR%2057738%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_65875"><div><strong>Action tremor</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>65875</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0234376</a></dd><dt><span class="dotprefix"></span></dt><dd>Sign or Symptom</dd></dl></div></div></div>
<div class="spaceAbove">A tremor present when the limbs are active, either when outstretched in a certain position or throughout a voluntary movement.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/65875">Feature record</a> | <a href="/medgen?term=%22Action%20tremor%22%5BClinical%20Features%5D%20OR%2065875%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_66696"><div><strong>Postural tremor</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>66696</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0234378</a></dd><dt><span class="dotprefix"></span></dt><dd>Sign or Symptom</dd></dl></div></div></div>
<div class="spaceAbove">A type of tremors that is triggered by holding a limb in a fixed position.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/66696">Feature record</a> | <a href="/medgen?term=%22Postural%20tremor%22%5BClinical%20Features%5D%20OR%2066696%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_116113"><div><strong>Scanning speech</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>116113</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0240952</a></dd><dt><span class="dotprefix"></span></dt><dd>Mental or Behavioral Dysfunction</dd></dl></div></div></div>
<div class="spaceAbove">An abnormal pattern of speech in which the words are as if measured or scanned; there is a pause after every syllable, and the syllables themselves are pronounced slowly.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/116113">Feature record</a> | <a href="/medgen?term=%22Scanning%20speech%22%5BClinical%20Features%5D%20OR%20116113%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_96535"><div><strong>Truncal ataxia</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>96535</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0427190</a></dd><dt><span class="dotprefix"></span></dt><dd>Sign or Symptom</dd></dl></div></div></div>
<div class="spaceAbove">Truncal ataxia is a sign of ataxia characterized by instability of the trunk. It usually occurs during sitting.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/96535">Feature record</a> | <a href="/medgen?term=%22Truncal%20ataxia%22%5BClinical%20Features%5D%20OR%2096535%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_107895"><div><strong>Gait disturbance</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>107895</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0575081</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">The term gait disturbance can refer to any disruption of the ability to walk.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/107895">Feature record</a> | <a href="/medgen?term=%22Gait%20disturbance%22%5BClinical%20Features%5D%20OR%20107895%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_196624"><div><strong>Cerebellar atrophy</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>196624</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0740279</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Cerebellar atrophy is defined as a cerebellum with initially normal structures, in a posterior fossa with normal size, which displays enlarged fissures (interfolial spaces) in comparison to the foliae secondary to loss of tissue. Cerebellar atrophy implies irreversible loss of tissue and result from an ongoing progressive disease until a final stage is reached or a single injury, e.g. an intoxication or infectious event.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/196624">Feature record</a> | <a href="/medgen?term=%22Cerebellar%20atrophy%22%5BClinical%20Features%5D%20OR%20196624%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_149271"><div><strong>Cerebellar vermis atrophy</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>149271</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0742028</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Wasting (atrophy) of the vermis of cerebellum.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/149271">Feature record</a> | <a href="/medgen?term=%22Cerebellar%20vermis%20atrophy%22%5BClinical%20Features%5D%20OR%20149271%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_196692"><div><strong>Limb ataxia</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>196692</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0750937</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">A kind of ataxia that affects movements of the extremities.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/196692">Feature record</a> | <a href="/medgen?term=%22Limb%20ataxia%22%5BClinical%20Features%5D%20OR%20196692%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_155642"><div><strong>Gait ataxia</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>155642</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0751837</a></dd><dt><span class="dotprefix"></span></dt><dd>Sign or Symptom</dd></dl></div></div></div>
<div class="spaceAbove">A type of ataxia characterized by the impairment of the ability to coordinate the movements required for normal walking. Gait ataxia is characteirzed by a wide-based staggering gait with a tendency to fall.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/155642">Feature record</a> | <a href="/medgen?term=%22Gait%20ataxia%22%5BClinical%20Features%5D%20OR%20155642%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_167799"><div><strong>Broad-based gait</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>167799</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0856863</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">An abnormal gait pattern in which persons stand and walk with their feet spaced widely apart. This is often a component of cerebellar ataxia.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/167799">Feature record</a> | <a href="/medgen?term=%22Broad-based%20gait%22%5BClinical%20Features%5D%20OR%20167799%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_340244"><div><strong>Limb dysmetria</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>340244</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C1854489</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">A type of dysmetria involving the limbs.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/340244">Feature record</a> | <a href="/medgen?term=%22Limb%20dysmetria%22%5BClinical%20Features%5D%20OR%20340244%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_476998"><div><strong>Impaired tandem gait</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>476998</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C3275367</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Reduced ability to walk in a straight line while placing the feet heel to toe.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/476998">Feature record</a> | <a href="/medgen?term=%22Impaired%20tandem%20gait%22%5BClinical%20Features%5D%20OR%20476998%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_811461"><div><strong>Intellectual disability</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>811461</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C3714756</a></dd><dt><span class="dotprefix"></span></dt><dd>Mental or Behavioral Dysfunction</dd></dl></div></div></div>
<div class="spaceAbove">Intellectual disability, previously referred to as mental retardation, is characterized by subnormal intellectual functioning that occurs during the developmental period. It is defined by an IQ score below 70.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/811461">Feature record</a> | <a href="/medgen?term=%22Intellectual%20disability%22%5BClinical%20Features%5D%20OR%20811461%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_868344"><div><strong>Neurodevelopmental delay</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>868344</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C4022738</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Neurodevelopmental delay (NDD) refers to delays in the maturation of the brain and central nervous system; infants and young children with NDD may experience delays in the development of one or more skills including gross motor abilities, fine-motor coordination, language abilities and ability to solve increasingly complex problems.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/868344">Feature record</a> | <a href="/medgen?term=%22Neurodevelopmental%20delay%22%5BClinical%20Features%5D%20OR%20868344%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_870270"><div><strong>Cerebellar cortical atrophy</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>870270</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C4024710</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Atrophy (wasting) of the cerebellar cortex.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/870270">Feature record</a> | <a href="/medgen?term=%22Cerebellar%20cortical%20atrophy%22%5BClinical%20Features%5D%20OR%20870270%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_1642960"><div><strong>Intention tremor</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>1642960</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C4551520</a></dd><dt><span class="dotprefix"></span></dt><dd>Sign or Symptom</dd></dl></div></div></div>
<div class="spaceAbove">A type of kinetic tremor that occurs during target directed movement is called intention tremor. That is, an oscillatory cerebellar ataxia that tends to be absent when the limbs are inactive and during the first part of voluntary movement but worsening as the movement continues and greater precision is required (e.g., in touching a target such as the patient's nose or a physician's finger).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/1642960">Feature record</a> | <a href="/medgen?term=%22Intention%20tremor%22%5BClinical%20Features%5D%20OR%201642960%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_45166"><div><strong>Nystagmus</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>45166</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0028738</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Rhythmic, involuntary oscillations of one or both eyes related to abnormality in fixation, conjugate gaze, or vestibular mechanisms.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/45166">Feature record</a> | <a href="/medgen?term=%22Nystagmus%22%5BClinical%20Features%5D%20OR%2045166%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_98065"><div><strong>Hypometric saccades</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>98065</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0423082</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Saccadic undershoot, i.e., a saccadic eye movement that has less than the magnitude that would be required to gain fixation of the object.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/98065">Feature record</a> | <a href="/medgen?term=%22Hypometric%20saccades%22%5BClinical%20Features%5D%20OR%2098065%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_140835"><div><strong>Hypermetric saccades</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>140835</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0423083</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">A saccade that overshoots the target with the dynamic saccade.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/140835">Feature record</a> | <a href="/medgen?term=%22Hypermetric%20saccades%22%5BClinical%20Features%5D%20OR%20140835%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_322908"><div><strong>Dysmetric saccades</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>322908</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C1836392</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">The controller signal for saccadic eye movements has two components</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/322908">Feature record</a> | <a href="/medgen?term=%22Dysmetric%20saccades%22%5BClinical%20Features%5D%20OR%20322908%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_325176"><div><strong>Impaired smooth pursuit</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>325176</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C1837458</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">An impairment of the ability to track objects with the ocular smooth pursuit system, a class of rather slow eye movements that minimizes retinal target motion.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/325176">Feature record</a> | <a href="/medgen?term=%22Impaired%20smooth%20pursuit%22%5BClinical%20Features%5D%20OR%20325176%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_377895"><div><strong>Gaze-evoked horizontal nystagmus</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>377895</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C1853394</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Horizontal nystagmus made apparent by looking to the right or to the left.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/377895">Feature record</a> | <a href="/medgen?term=%22Gaze-evoked%20horizontal%20nystagmus%22%5BClinical%20Features%5D%20OR%20377895%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_1808161"><div><strong>Gaze-evoked nystagmus</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>1808161</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C5574666</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Nystagmus made apparent by looking to the right or to the left.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/1808161">Feature record</a> | <a href="/medgen?term=%22Gaze-evoked%20nystagmus%22%5BClinical%20Features%5D%20OR%201808161%5Buid%5D">Search on this feature</a></div></div><div class="TreeLite" data-jigconfig="closed: 1"><div class="concept-def"><a class="small" href="#" onclick="jQuery(&quot;.TreeLite&quot;,&quot;#ID_102&quot;).TreeLite().openAll(); return false;">Show all</a><a class="small" href="#" onclick="jQuery(&quot;.TreeLite&quot;,&quot;#ID_102&quot;).TreeLite().closeAll(); return false;">Hide all</a></div><ul><li><span class="TLline">Abnormality of the digestive system</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_41440" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Dysphagia</a></span></li></ul></li><li><span class="TLline">Abnormality of the eye</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_322908" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Dysmetric saccades</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_377895" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Gaze-evoked horizontal nystagmus</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_1808161" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Gaze-evoked nystagmus</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_140835" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Hypermetric saccades</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_98065" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Hypometric saccades</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_325176" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Impaired smooth pursuit</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_45166" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Nystagmus</a></span></li></ul></li><li><span class="TLline">Abnormality of the nervous system</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_65875" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Action tremor</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_19708" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Babinski sign</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_167799" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Broad-based gait</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_196624" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Cerebellar atrophy</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_870270" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Cerebellar cortical atrophy</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_149271" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Cerebellar vermis atrophy</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_854" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Cerebral palsy</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_3420" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Chorea</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_8510" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Dysarthria</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_8514" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Dyskinesia</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_155642" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Gait ataxia</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_107895" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Gait disturbance</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_57738" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Hyperreflexia</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_476998" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Impaired tandem gait</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_811461" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Intellectual disability</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_1642960" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Intention tremor</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_196692" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Limb ataxia</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_340244" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Limb dysmetria</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_868344" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Neurodevelopmental delay</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_66696" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Postural tremor</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_116113" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Scanning speech</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_7753" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Spasticity</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_21635" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Tremor</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_96535" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Truncal ataxia</a></span></li></ul></li></ul></div></div>
</div>
<div class="portlet mgSection" id="ID_118">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Term_Hierarchy">Term Hierarchy</h1><a sid="118" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln HierarchyGTR"><div class="jig-ncbitabs"><ul><li><a href="#tabGTR">GTR</a></li><li><a href="#tabMGEN">MeSH</a></li><li><a href="#tabORDO">Orphanet</a></li></ul><div id="tabGTR"><div class="search_result"><div class="rprts"><div class="chiclet_legend"><span class="chiclet_list" style="position:static;"><span title="Clinical test" class="chiclet Ccolor round">C</span><span>Clinical test,  </span><span title="Research test" class="chiclet Rcolor round">R</span><span>Research test,  </span><span title="OMIM" class="chiclet Ocolor ">O</span><span>OMIM,  </span><span title="GeneReview" class="chiclet Gcolor">G</span><span><em>GeneReviews</em>,  </span><span title="ClinVar" class="chiclet Vcolor">V</span><span>ClinVar  </span></span></div><div id="hierarchy" class="margin_t1"><div class="ds_tree"><ul><li class="matched_ds"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1847725[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=338301">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=338301" target="_blank" href="/omim/147265">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1138/" ref="ncbi_uid=338301">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=338301" ref="ncbi_uid=338301">V</a></span></span><span class="TLline">Spinocerebellar ataxia type 15/16</span></li></ul></div></div></div></div></div><div id="tabMGEN"><div class="ds_tree"><ul><li><span class="TLline"><a href="/medgen/1842696" ref="tree=MeSH" title="MedGen record for Autosomal dominant cerebellar ataxia type I">Autosomal dominant cerebellar ataxia type I</a></span><ul><li><span class="matched_ds">Spinocerebellar ataxia type 15/16</span></li></ul></li></ul></div></div><div id="tabORDO">Follow <a target="_blank" href="http://www.orpha.net/consor/cgi-bin/Disease_Classif.php?lng=EN&amp;data_id=156&amp;PatId=13786&amp;search=Disease_Classif_Simple&amp;new=1" class="ital bold">this link</a> to review classifications for <span class="ital">Spinocerebellar ataxia type 15/16</span> in Orphanet.</div></div></div>
</div>
<div class="display-none help-popup" id="guidelinesHelpPM">These guidelines are articles in PubMed that match specific search criteria developed by MedGen to capture the most relevant practice guidelines. This list may not be comprehensive and may include broader topics as well. See the <a href="/medgen/docs/faq/" title="Frequently asked questions" target="_blank">FAQ</a> for details.</div><div class="display-none help-popup" id="guidelinesHelpCurated">These guidelines are manually curated by the MedGen team
to supplement articles available in PubMed. See the <a href="/medgen/docs/faq/" title="Frequently asked questions" target="_blank">FAQ</a> for details.</div>
<div class="portlet mgSection" id="ID_103">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Recent_clinical_studies">Recent clinical studies</h1><a sid="103" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><h3 class="subhead">Etiology</h3>
<div class="nl"><a target="_blank" href="/pubmed/25192506">Genetic cerebellar ataxias.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Storey E</span><br />
<span class="medgenPMjournal">Semin Neurol</span>
2014 Jul;34(3):280-92.
Epub 2014 Sep 5
doi: 10.1055/s-0034-1386766.
<span class="bold">PMID: </span><a href="/pubmed/25192506" target="_blank">25192506</a></div>
<div class="nl"><a target="_blank" href="/pubmed/15299171">Clinical features of hereditary spinocerebellar ataxia diagnosed by molecular genetic analysis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Lau KK,
Lam K,
Shiu KL,
Au KM,
Tsoi TH,
Chan AY,
Li HL,
Sheng B</span><br />
<span class="medgenPMjournal">Hong Kong Med J</span>
2004 Aug;10(4):255-9.
<span class="bold">PMID: </span><a href="/pubmed/15299171" target="_blank">15299171</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Spinocerebellar%20ataxia%20type%2015%2F16%22%20AND%20Etiology%2Fbroad%5Bfilter%5D%20%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (2)</a></div><h3 class="subhead">Diagnosis</h3>
<div class="nl"><a target="_blank" href="/pubmed/25192506">Genetic cerebellar ataxias.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Storey E</span><br />
<span class="medgenPMjournal">Semin Neurol</span>
2014 Jul;34(3):280-92.
Epub 2014 Sep 5
doi: 10.1055/s-0034-1386766.
<span class="bold">PMID: </span><a href="/pubmed/25192506" target="_blank">25192506</a></div>
<div class="nl"><a target="_blank" href="/pubmed/15299171">Clinical features of hereditary spinocerebellar ataxia diagnosed by molecular genetic analysis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Lau KK,
Lam K,
Shiu KL,
Au KM,
Tsoi TH,
Chan AY,
Li HL,
Sheng B</span><br />
<span class="medgenPMjournal">Hong Kong Med J</span>
2004 Aug;10(4):255-9.
<span class="bold">PMID: </span><a href="/pubmed/15299171" target="_blank">15299171</a></div>
<div class="nl"><a target="_blank" href="/pubmed/7011307">Relationship of DNA lesions and their repair to chromosomal aberration production.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Bender MA</span><br />
<span class="medgenPMjournal">Basic Life Sci</span>
1980;15:245-65.
doi: 10.1007/978-1-4684-3842-0_17.
<span class="bold">PMID: </span><a href="/pubmed/7011307" target="_blank">7011307</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Spinocerebellar%20ataxia%20type%2015%2F16%22%20AND%20Diagnosis%2Fbroad%5Bfilter%5D%20%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (3)</a></div><h3 class="subhead">Prognosis</h3>
<div class="nl"><a target="_blank" href="/pubmed/37821226">ITPR1-associated spinocerebellar ataxia with craniofacial features-additional evidence for germline mosaicism.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Kleyner R,
Ung N,
Arif M,
Marchi E,
Amble K,
Gavin M,
Madrid R,
Lyon G</span><br />
<span class="medgenPMjournal">Cold Spring Harb Mol Case Stud</span>
2023 Dec;9(4)
Epub 2024 Jan 10
doi: 10.1101/mcs.a006303.
<span class="bold">PMID: </span><a href="/pubmed/37821226" target="_blank">37821226</a><a href="/pmc/articles/PMC10815276" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Spinocerebellar%20ataxia%20type%2015%2F16%22%20AND%20Prognosis%2Fbroad%5Bfilter%5D%20%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (1)</a></div><h3 class="subhead">Clinical prediction guides</h3>
<div class="nl"><a target="_blank" href="/pubmed/37821226">ITPR1-associated spinocerebellar ataxia with craniofacial features-additional evidence for germline mosaicism.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Kleyner R,
Ung N,
Arif M,
Marchi E,
Amble K,
Gavin M,
Madrid R,
Lyon G</span><br />
<span class="medgenPMjournal">Cold Spring Harb Mol Case Stud</span>
2023 Dec;9(4)
Epub 2024 Jan 10
doi: 10.1101/mcs.a006303.
<span class="bold">PMID: </span><a href="/pubmed/37821226" target="_blank">37821226</a><a href="/pmc/articles/PMC10815276" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Spinocerebellar%20ataxia%20type%2015%2F16%22%20AND%20Clinical%20prediction%20guides%2Fbroad%5Bfilter%5D%20%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (1)</a></div></div>
</div>
</div></div></div></div></div></div></div>
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</div>
</div>
</div>
<div class="supplemental col three_col last">
<h2 class="offscreen_noflow">Supplemental Content</h2>
<div>
<!-- MedGen supplemental column starts here -->
<div class="rightCol mgCol">
<div class="portlet mgSection" id="ID_113">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Table_of_contents">Table of contents</h1><a sid="113" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><ul id="my-toc"></ul></div>
</div>
<div class="portlet mgSection" id="ID_106">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Genetic_Testing_Registry">Genetic Testing Registry</h1><a sid="106" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><ul><li><a href="/gtr/tests?term=C1847725%5bDISCUI%5d&amp;filter=method%3A2%5F8" target="_blank">Deletion/duplication analysis (17)</a></li>
<li><a href="/gtr/tests?term=C1847725%5bDISCUI%5d&amp;filter=method%3A2%5F12" target="_blank">Microsatellite instability testing (MSI) (1)</a></li>
<li><a href="/gtr/tests?term=C1847725%5bDISCUI%5d&amp;filter=method%3A2%5F7" target="_blank">Sequence analysis of the entire coding region (21)</a></li>
<li><a href="/gtr/tests?term=C1847725%5bDISCUI%5d&amp;filter=method%3A2%5F19" target="_blank">Targeted variant analysis (7)</a></li>
<li class="portletSeeAll portletSeeAllPad"><total><a href="/gtr/tests?term=C1847725%5bDISCUI%5d" target="_blank">See all (26)</a></total></li>
</ul></div>
</div>
<div class="portlet mgSection" id="ID_119">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Clinical_resources">Clinical resources</h1><a sid="119" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><ul><li><a href="https://www.omim.org/search?index=entry&amp;start=1&amp;limit=10&amp;sort=score%20desc&amp;field=number&amp;search=606658" target="_blank">OMIM</a></li><li><a href="http://www.orpha.net/consor/cgi-bin/OC_Exp.php?Expert=98769" target="_blank">Orphanet</a></li><li><a href="https://clinicaltrials.gov/search?cond=Spinocerebellar%20ataxia%20type%2015/16" target="_blank">ClinicalTrials.gov</a></li></ul></div>
</div>
<div class="portlet mgSection" id="ID_115">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Molecular_resources">Molecular resources</h1><a sid="115" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><ul><li><a href="http://www.omim.org/search?index=entry&amp;start=1&amp;limit=10&amp;sort=score%20desc&amp;field=number&amp;search=147265" target="_blank">OMIM</a></li><li><a href="/clinvar/?term=3708[geneid]" target="_blank">View ITPR1 variations in ClinVar</a></li><li><a href="/nuccore/270297162" target="_blank">RefSeqGene</a></li><li><a href="https://catalog.coriell.org/Search?q=606658" target="_blank">Coriell Institute for Medical Research</a></li></ul></div>
</div>
<div class="portlet mgSection" id="ID_116">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Consumer_resources">Consumer resources</h1><a sid="116" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><ul><li><a href="https://www.malacards.org/card/spinocerebellar_ataxia_15" target="_blank">MalaCards</a></li><li><a href="https://vsearch.nlm.nih.gov/vivisimo/cgi-bin/query-meta?v:project=medlineplus&amp;query=Spinocerebellar%20ataxia%20type%2015/16" target="_blank">MedlinePlus</a></li><li><a href="https://rarediseases.info.nih.gov/diseases/10477/disease" target="_blank">NCATS Office of Rare Diseases Research (GARD)</a></li></ul></div>
</div>
</div>
<div class="portlet brieflink">
<div class="portlet_head">
<div class="portlet_title">
<h3>Reviews</h3>
</div>
<a name="EntrezSystem2.PEntrez.MedGen.MedGen_ResultsPanel.MedGen_SingleItemSuplCluster.MedGenReviews.Shutter" sid="1" href="#" class="portlet_shutter" title="Show/hide content" remembercollapsed="true" pgsec_name="Reviews" id="EntrezSystem2.PEntrez.MedGen.MedGen_ResultsPanel.MedGen_SingleItemSuplCluster.MedGenReviews.Shutter"></a>
</div>
<div class="portlet_content">
<ul>
<li>
<a href="/pubmed/20301317" ref="ncbi_uid=&amp;discoId=gtr_reviews&amp;linkpos=1&amp;linkpostotal=3" target="_blank"><span class="gene_reviews">GeneReviews</span></a>
</li>
<li>
<a href="/pubmed/clinical?term=Spinocerebellar%20ataxia%20type%2015/16" ref="ncbi_uid=&amp;discoId=gtr_reviews&amp;linkpos=2&amp;linkpostotal=3" target="_blank">PubMed Clinical Queries</a>
</li>
<li>
<a href="/pubmed?term=Spinocerebellar%20ataxia%20type%2015/16%20AND%20humans[mesh]%20AND%20review[publication%20type]" ref="ncbi_uid=&amp;discoId=gtr_reviews&amp;linkpos=3&amp;linkpostotal=3" target="_blank">Reviews in PubMed</a>
</li>
</ul>
</div>
</div>
<!-- MedGen supplemental column ends here -->
<div class="portlet brieflink">
<div class="portlet_head">
<div class="portlet_title">
<h3>Related information</h3>
</div>
<a name="EntrezSystem2.PEntrez.MedGen.MedGen_ResultsPanel.MedGen_SingleItemSuplCluster.MedGenDiscoveryDbLinks.Shutter" sid="1" href="#" class="portlet_shutter" title="Show/hide content" remembercollapsed="true" pgsec_name="discovery_db_links" id="EntrezSystem2.PEntrez.MedGen.MedGen_ResultsPanel.MedGen_SingleItemSuplCluster.MedGenDiscoveryDbLinks.Shutter"></a>
</div>
<div class="portlet_content DiscoveryDbLinks">
<ul>
<li class="brieflinkpopper">
<a class="brieflinkpopperctrl" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=338301" ref="log$=recordlinks">ClinVar</a>
<div class="brieflinkpop offscreen_noflow">Related medical variations</div>
</li>
<li class="brieflinkpopper">
<a class="brieflinkpopperctrl" href="/gene?LinkName=medgen_gene_diseases&amp;from_uid=338301" ref="log$=recordlinks">Gene</a>
<div class="brieflinkpop offscreen_noflow">Related information in NCBI Gene</div>
</li>
<li class="brieflinkpopper">
<a class="brieflinkpopperctrl" href="/gtr/tests?term=C1847725[DISCUI]" ref="log$=recordlinks">GTR</a>
<div class="brieflinkpop offscreen_noflow">Related information in GTR</div>
</li>
<li class="brieflinkpopper">
<a class="brieflinkpopperctrl" href="/gtr/tests?term=C1847725[DISCUI]&amp;test_type=Clinical" ref="log$=recordlinks">GTR(Clinical)</a>
<div class="brieflinkpop offscreen_noflow">Clinical tests in GTR</div>
</li>
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