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<meta name="keywords" content="C2677843, disease or syndrome, ea7, episodic ataxia type 7, episodic ataxia, type 7, 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="Episodic ataxia is a group of related conditions that affect the nervous system and cause problems with movement and coordination. People with episodic ataxia have episodes of poor coordination and balance (ataxia). During these episodes, many people also experience dizziness (vertigo), nausea and vomiting, migraines, blurred or double vision, slurred speech, and ringing in the ears (tinnitus). Seizures, muscle weakness, and paralysis that affect one side of the body (hemiplegia) may also occur during these episodes. \n\nAdditionally, a muscle abnormality called myokymia or an eye abnormality called nystagmus can occur during or between episodes. Myokymia causes muscle cramping; stiffness; or continuous, fine muscle twitching that appears as rippling under the skin. Nystagmus refers to rapid, involuntary eye movements.\n\nResearchers have identified at least 11 types of episodic ataxia, distinguished by their pattern of signs and symptoms, age of onset, length of episodes, and genetic cause.\n\nEpisodes of ataxia and other symptoms can begin anytime from early childhood to adulthood. They can be triggered by environmental factors such as stress, caffeine, alcohol, certain medications, physical activity, and illness. The duration of episodes may vary from seconds to days, and the frequency ranges from several episodes per day to one or two every few months. Between episodes, affected individuals may have no signs or symptoms. However, some continue to experience ataxia, which may worsen over time.\n\nSome children with episodic ataxia have delayed development of speech or motor skills, such as standing and walking. They may also have learning difficulties." /><meta name="robots" content="index,nofollow,noarchive" />
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<title>Episodic ataxia type 7 (Concept Id: C2677843)
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<!--
UID=383209
ConceptID=C2677843
-->
<!--imgCountBooks = 0--><h1 class="medgenTitle"><div class="MedGenTitleText">Episodic ataxia type 7<span class="h1sub">(EA7)</span></div></h1><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>383209</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.">C2677843</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div><table class="medgenTable"><tbody><tr><td>Synonym:</td>
<td>Episodic Ataxia, Type 7</td></tr>
<tr><td><span class="bold">SNOMED CT: </span></td>
<td>Episodic ataxia type 7 (718752007)</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>Monarch Initiative:</td>
<td><a href="https://monarchinitiative.org/disease/MONDO:0012755" target="_blank">MONDO:0012755</a></td></tr>
<tr><td>OMIM<span class="superscript">®</span>:</td>
<td><a href="https://omim.org/entry/611907" target="_blank">611907</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=209970">ORPHA209970</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">Episodic ataxia is a group of related conditions that affect the nervous system and cause problems with movement and coordination. People with episodic ataxia have episodes of poor coordination and balance (ataxia). During these episodes, many people also experience dizziness (vertigo), nausea and vomiting, migraines, blurred or double vision, slurred speech, and ringing in the ears (tinnitus). Seizures, muscle weakness, and paralysis that affect one side of the body (hemiplegia) may also occur during these episodes. <br /><br />Additionally, a muscle abnormality called myokymia or an eye abnormality called nystagmus can occur during or between episodes. Myokymia causes muscle cramping; stiffness; or continuous, fine muscle twitching that appears as rippling under the skin. Nystagmus refers to rapid, involuntary eye movements.<br /><br />Researchers have identified at least 11 types of episodic ataxia, distinguished by their pattern of signs and symptoms, age of onset, length of episodes, and genetic cause.<br /><br />Episodes of ataxia and other symptoms can begin anytime from early childhood to adulthood. They can be triggered by environmental factors such as stress, caffeine, alcohol, certain medications, physical activity, and illness. The duration of episodes may vary from seconds to days, and the frequency ranges from several episodes per day to one or two every few months. Between episodes, affected individuals may have no signs or symptoms. However, some continue to experience ataxia, which may worsen over time.<br /><br />Some children with episodic ataxia have delayed development of speech or motor skills, such as standing and walking. They may also have learning difficulties. [from <a title="MedlinePlus Genetics" href="https://medlineplus.gov/genetics/" class="defSource" target="_blank">MedlinePlus Genetics</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_53006"><div><strong>Vertigo</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>53006</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.">C0042571</a></dd><dt><span class="dotprefix"></span></dt><dd>Sign or Symptom</dd></dl></div></div></div>
<div class="spaceAbove">An abnormal sensation of spinning while the body is actually stationary.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/53006">Feature record</a> | <a href="/medgen?term=%22Vertigo%22%5BClinical%20Features%5D%20OR%2053006%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_314033"><div><strong>Hereditary episodic ataxia</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>314033</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.">C1720189</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Periodic spells of incoordination and imbalance, that is, episodes of ataxia typically lasting from 10 minutes to several hours or days.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/314033">Feature record</a> | <a href="/medgen?term=%22Hereditary%20episodic%20ataxia%22%5BClinical%20Features%5D%20OR%20314033%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_57735"><div><strong>Muscle weakness</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>57735</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.">C0151786</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Reduced strength of muscles.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/57735">Feature record</a> | <a href="/medgen?term=%22Muscle%20weakness%22%5BClinical%20Features%5D%20OR%2057735%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 musculoskeletal system</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_57735" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Muscle weakness</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_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_314033" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Hereditary episodic ataxia</a></span></li></ul></li><li><span class="TLline">Ear malformation</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_53006" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Vertigo</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="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1720189[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=314033">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet unavailable" title="OMIM">O</span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=314033" ref="ncbi_uid=314033">V</a></span></span><span class="TLline"><a href="/medgen/314033" ref="tree=GTR&amp;ncbi_uid=314033&amp;link_uid=314033" title="View MedGen record for 'Hereditary episodic ataxia'">Hereditary episodic ataxia</a></span><ul><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1719788[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=318554">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=318554" target="_blank" href="/omim/160120">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/?term=(NBK1138%20OR%20NBK25442)%20AND%20gene%5Bbook%5D&amp;showtype=onebook" ref="ncbi_uid=318554">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=318554" ref="ncbi_uid=318554">V</a></span></span><span class="TLline"><a href="/medgen/318554" ref="tree=GTR&amp;ncbi_uid=318554&amp;link_uid=318554" title="View MedGen record for 'Episodic ataxia type 1'">Episodic ataxia type 1</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1720416[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=314039">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=314039" target="_blank" href="/omim/108500">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1138/" ref="ncbi_uid=314039">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=314039" ref="ncbi_uid=314039">V</a></span></span><span class="TLline"><a href="/medgen/314039" ref="tree=GTR&amp;ncbi_uid=314039&amp;link_uid=314039" title="View MedGen record for 'Episodic ataxia type 2'">Episodic ataxia type 2</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet unavailable round" title="Clinical test">C</span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=376220" target="_blank" href="/omim/606554">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1138/" ref="ncbi_uid=376220">G</a></span><span class="chiclet unavailable" title="ClinVar">V</span></span><span class="TLline"><a href="/medgen/376220" ref="tree=GTR&amp;ncbi_uid=376220&amp;link_uid=376220" title="View MedGen record for 'Episodic ataxia type 3'">Episodic ataxia type 3</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet unavailable round" title="Clinical test">C</span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=376222" target="_blank" href="/omim/606552">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1138/" ref="ncbi_uid=376222">G</a></span><span class="chiclet unavailable" title="ClinVar">V</span></span><span class="TLline"><a href="/medgen/376222" ref="tree=GTR&amp;ncbi_uid=376222&amp;link_uid=376222" title="View MedGen record for 'Episodic ataxia type 4'">Episodic ataxia type 4</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1866039[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=356142">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=356142" target="_blank" href="/omim/601949">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1138/" ref="ncbi_uid=356142">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=356142" ref="ncbi_uid=356142">V</a></span></span><span class="TLline"><a href="/medgen/356142" ref="tree=GTR&amp;ncbi_uid=356142&amp;link_uid=356142" title="View MedGen record for 'Episodic ataxia type 5'">Episodic ataxia type 5</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C2675211[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=390739">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=390739" target="_blank" href="/omim/600111">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1138/" ref="ncbi_uid=390739">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=390739" ref="ncbi_uid=390739">V</a></span></span><span class="TLline"><a href="/medgen/390739" ref="tree=GTR&amp;ncbi_uid=390739&amp;link_uid=390739" title="View MedGen record for 'Episodic ataxia type 6'">Episodic ataxia type 6</a></span></li><li class="matched_ds"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C2677843[DISCUI]&amp;test_type=Clinical&amp;redirect=true" ref="ncbi_uid=383209">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=383209" target="_blank" href="/omim/611907">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet unavailable" title="ClinVar">V</span></span><span class="TLline">Episodic ataxia type 7</span></li></ul></li></ul></div></div></div></div></div><div id="tabMGEN"><div class="ds_tree"><ul><li><span class="TLline"><a href="/medgen/105425" ref="tree=MeSH" title="MedGen record for Abnormality of the nervous system">Abnormality of the nervous system</a></span><ul><li><span class="TLline"><a href="/medgen/868417" ref="tree=MeSH" title="MedGen record for Abnormal nervous system physiology">Abnormal nervous system physiology</a></span><ul><li><span class="TLline"><a href="/medgen/868940" ref="tree=MeSH" title="MedGen record for Abnormal central motor function">Abnormal central motor function</a></span><ul><li><span class="TLline"><a href="/medgen/868939" ref="tree=MeSH" title="MedGen record for Abnormality of coordination">Abnormality of coordination</a></span><ul><li><span class="TLline"><a href="/medgen/849" ref="tree=MeSH" title="MedGen record for Cerebellar ataxia">Cerebellar ataxia</a></span><ul><li><span class="TLline"><a href="/medgen/314033" ref="tree=MeSH" title="MedGen record for Hereditary episodic ataxia">Hereditary episodic ataxia</a></span><ul><li><span class="matched_ds">Episodic ataxia type 7</span></li></ul></li></ul></li></ul></li></ul></li></ul></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=18677&amp;search=Disease_Classif_Simple&amp;new=1" class="ital bold">this link</a> to review classifications for <span class="ital">Episodic ataxia type 7</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/31115040">Cognitive impairment in children with CACNA1A mutations.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Humbertclaude V,
Riant F,
Krams B,
Zimmermann V,
Nagot N,
Annequin D,
Echenne B,
Tournier-Lasserve E,
Roubertie A;
Episodic Syndrome Consortium</span><br />
<span class="medgenPMjournal">Dev Med Child Neurol</span>
2020 Mar;62(3):330-337.
Epub 2019 May 21
doi: 10.1111/dmcn.14261.
<span class="bold">PMID: </span><a href="/pubmed/31115040" target="_blank">31115040</a></div>
<div class="nl"><a target="_blank" href="/pubmed/30552638">What Is Behind Cerebellar Vertigo and Dizziness?</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Feil K,
Strobl R,
Schindler A,
Krafczyk S,
Goldschagg N,
Frenzel C,
Glaser M,
Schöberl F,
Zwergal A,
Strupp M</span><br />
<span class="medgenPMjournal">Cerebellum</span>
2019 Jun;18(3):320-332.
doi: 10.1007/s12311-018-0992-8.
<span class="bold">PMID: </span><a href="/pubmed/30552638" target="_blank">30552638</a></div>
<div class="nl"><a target="_blank" href="/pubmed/27733563">Dominant KCNA2 mutation causes episodic ataxia and pharmacoresponsive epilepsy.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Corbett MA,
Bellows ST,
Li M,
Carroll R,
Micallef S,
Carvill GL,
Myers CT,
Howell KB,
Maljevic S,
Lerche H,
Gazina EV,
Mefford HC,
Bahlo M,
Berkovic SF,
Petrou S,
Scheffer IE,
Gecz J</span><br />
<span class="medgenPMjournal">Neurology</span>
2016 Nov 8;87(19):1975-1984.
Epub 2016 Oct 12
doi: 10.1212/WNL.0000000000003309.
<span class="bold">PMID: </span><a href="/pubmed/27733563" target="_blank">27733563</a><a href="/pmc/articles/PMC5109949" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/24057832">Pharmacotherapy of vestibular disorders and nystagmus.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Strupp M,
Kremmyda O,
Brandt T</span><br />
<span class="medgenPMjournal">Semin Neurol</span>
2013 Jul;33(3):286-96.
Epub 2013 Sep 21
doi: 10.1055/s-0033-1354594.
<span class="bold">PMID: </span><a href="/pubmed/24057832" target="_blank">24057832</a></div>
<div class="nl"><a target="_blank" href="/pubmed/21461686">Pharmacotherapy of vestibular and ocular motor disorders, including nystagmus.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Strupp M,
Thurtell MJ,
Shaikh AG,
Brandt T,
Zee DS,
Leigh RJ</span><br />
<span class="medgenPMjournal">J Neurol</span>
2011 Jul;258(7):1207-22.
Epub 2011 Apr 2
doi: 10.1007/s00415-011-5999-8.
<span class="bold">PMID: </span><a href="/pubmed/21461686" target="_blank">21461686</a><a href="/pmc/articles/PMC3132281" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Episodic%20ataxia%20type%207%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 (10)</a></div><h3 class="subhead">Diagnosis</h3>
<div class="nl"><a target="_blank" href="/pubmed/34709445">Vestibular impairments in episodic ataxia type 2.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Choi JH,
Oh EH,
Choi SY,
Kim HJ,
Lee SK,
Choi JY,
Kim JS,
Choi KD</span><br />
<span class="medgenPMjournal">J Neurol</span>
2022 May;269(5):2687-2695.
Epub 2021 Oct 28
doi: 10.1007/s00415-021-10856-4.
<span class="bold">PMID: </span><a href="/pubmed/34709445" target="_blank">34709445</a></div>
<div class="nl"><a target="_blank" href="/pubmed/24200040">A three-year-old boy with glucose transporter type 1 deficiency syndrome presenting with episodic ataxia.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Ohshiro-Sasaki A,
Shimbo H,
Takano K,
Wada T,
Osaka H</span><br />
<span class="medgenPMjournal">Pediatr Neurol</span>
2014 Jan;50(1):99-100.
Epub 2013 Nov 5
doi: 10.1016/j.pediatrneurol.2013.09.002.
<span class="bold">PMID: </span><a href="/pubmed/24200040" target="_blank">24200040</a></div>
<div class="nl"><a target="_blank" href="/pubmed/24057832">Pharmacotherapy of vestibular disorders and nystagmus.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Strupp M,
Kremmyda O,
Brandt T</span><br />
<span class="medgenPMjournal">Semin Neurol</span>
2013 Jul;33(3):286-96.
Epub 2013 Sep 21
doi: 10.1055/s-0033-1354594.
<span class="bold">PMID: </span><a href="/pubmed/24057832" target="_blank">24057832</a></div>
<div class="nl"><a target="_blank" href="/pubmed/21461686">Pharmacotherapy of vestibular and ocular motor disorders, including nystagmus.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Strupp M,
Thurtell MJ,
Shaikh AG,
Brandt T,
Zee DS,
Leigh RJ</span><br />
<span class="medgenPMjournal">J Neurol</span>
2011 Jul;258(7):1207-22.
Epub 2011 Apr 2
doi: 10.1007/s00415-011-5999-8.
<span class="bold">PMID: </span><a href="/pubmed/21461686" target="_blank">21461686</a><a href="/pmc/articles/PMC3132281" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/18180645">Recent advances in the genetics of recurrent vertigo and vestibulopathy.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Jen JC</span><br />
<span class="medgenPMjournal">Curr Opin Neurol</span>
2008 Feb;21(1):3-7.
doi: 10.1097/WCO.0b013e3282f41ca0.
<span class="bold">PMID: </span><a href="/pubmed/18180645" target="_blank">18180645</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Episodic%20ataxia%20type%207%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 (13)</a></div><h3 class="subhead">Therapy</h3>
<div class="nl"><a target="_blank" href="/pubmed/30607796">Acetazolamide-Responsive Episodic Ataxia Linked to Novel Splice Site Variant in FGF14 Gene.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Schesny M,
Joncourt F,
Tarnutzer AA</span><br />
<span class="medgenPMjournal">Cerebellum</span>
2019 Jun;18(3):649-653.
doi: 10.1007/s12311-018-0997-3.
<span class="bold">PMID: </span><a href="/pubmed/30607796" target="_blank">30607796</a></div>
<div class="nl"><a target="_blank" href="/pubmed/30182858">Aminopyridines and Acetyl-DL-leucine: New Therapies in Cerebellar Disorders.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Kalla R,
Strupp M</span><br />
<span class="medgenPMjournal">Curr Neuropharmacol</span>
2019;17(1):7-13.
doi: 10.2174/1570159X16666180905093535.
<span class="bold">PMID: </span><a href="/pubmed/30182858" target="_blank">30182858</a><a href="/pmc/articles/PMC6341500" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/27733563">Dominant KCNA2 mutation causes episodic ataxia and pharmacoresponsive epilepsy.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Corbett MA,
Bellows ST,
Li M,
Carroll R,
Micallef S,
Carvill GL,
Myers CT,
Howell KB,
Maljevic S,
Lerche H,
Gazina EV,
Mefford HC,
Bahlo M,
Berkovic SF,
Petrou S,
Scheffer IE,
Gecz J</span><br />
<span class="medgenPMjournal">Neurology</span>
2016 Nov 8;87(19):1975-1984.
Epub 2016 Oct 12
doi: 10.1212/WNL.0000000000003309.
<span class="bold">PMID: </span><a href="/pubmed/27733563" target="_blank">27733563</a><a href="/pmc/articles/PMC5109949" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/21734179">A randomized trial of 4-aminopyridine in EA2 and related familial episodic ataxias.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Strupp M,
Kalla R,
Claassen J,
Adrion C,
Mansmann U,
Klopstock T,
Freilinger T,
Neugebauer H,
Spiegel R,
Dichgans M,
Lehmann-Horn F,
Jurkat-Rott K,
Brandt T,
Jen JC,
Jahn K</span><br />
<span class="medgenPMjournal">Neurology</span>
2011 Jul 19;77(3):269-75.
Epub 2011 Jul 6
doi: 10.1212/WNL.0b013e318225ab07.
<span class="bold">PMID: </span><a href="/pubmed/21734179" target="_blank">21734179</a><a href="/pmc/articles/PMC3136055" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Episodic%20ataxia%20type%207%22%20AND%20Therapy%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 (4)</a></div><h3 class="subhead">Prognosis</h3>
<div class="nl"><a target="_blank" href="/pubmed/27733563">Dominant KCNA2 mutation causes episodic ataxia and pharmacoresponsive epilepsy.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Corbett MA,
Bellows ST,
Li M,
Carroll R,
Micallef S,
Carvill GL,
Myers CT,
Howell KB,
Maljevic S,
Lerche H,
Gazina EV,
Mefford HC,
Bahlo M,
Berkovic SF,
Petrou S,
Scheffer IE,
Gecz J</span><br />
<span class="medgenPMjournal">Neurology</span>
2016 Nov 8;87(19):1975-1984.
Epub 2016 Oct 12
doi: 10.1212/WNL.0000000000003309.
<span class="bold">PMID: </span><a href="/pubmed/27733563" target="_blank">27733563</a><a href="/pmc/articles/PMC5109949" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/22258915">Principal component analysis of cerebellar shape on MRI separates SCA types 2 and 6 into two archetypal modes of degeneration.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Jung BC,
Choi SI,
Du AX,
Cuzzocreo JL,
Geng ZZ,
Ying HS,
Perlman SL,
Toga AW,
Prince JL,
Ying SH</span><br />
<span class="medgenPMjournal">Cerebellum</span>
2012 Dec;11(4):887-95.
doi: 10.1007/s12311-011-0334-6.
<span class="bold">PMID: </span><a href="/pubmed/22258915" target="_blank">22258915</a><a href="/pmc/articles/PMC3932524" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/21734179">A randomized trial of 4-aminopyridine in EA2 and related familial episodic ataxias.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Strupp M,
Kalla R,
Claassen J,
Adrion C,
Mansmann U,
Klopstock T,
Freilinger T,
Neugebauer H,
Spiegel R,
Dichgans M,
Lehmann-Horn F,
Jurkat-Rott K,
Brandt T,
Jen JC,
Jahn K</span><br />
<span class="medgenPMjournal">Neurology</span>
2011 Jul 19;77(3):269-75.
Epub 2011 Jul 6
doi: 10.1212/WNL.0b013e318225ab07.
<span class="bold">PMID: </span><a href="/pubmed/21734179" target="_blank">21734179</a><a href="/pmc/articles/PMC3136055" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/21126994">The dynamic regulation of cortical excitability is altered in episodic ataxia type 2.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Helmich RC,
Siebner HR,
Giffin N,
Bestmann S,
Rothwell JC,
Bloem BR</span><br />
<span class="medgenPMjournal">Brain</span>
2010 Dec;133(Pt 12):3519-29.
doi: 10.1093/brain/awq315.
<span class="bold">PMID: </span><a href="/pubmed/21126994" target="_blank">21126994</a></div>
<div class="nl"><a target="_blank" href="/pubmed/17872363">Peripheral nerve hyperexcitability due to dominant-negative KCNQ2 mutations.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Wuttke TV,
Jurkat-Rott K,
Paulus W,
Garncarek M,
Lehmann-Horn F,
Lerche H</span><br />
<span class="medgenPMjournal">Neurology</span>
2007 Nov 27;69(22):2045-53.
Epub 2007 Sep 13
doi: 10.1212/01.wnl.0000275523.95103.36.
<span class="bold">PMID: </span><a href="/pubmed/17872363" target="_blank">17872363</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Episodic%20ataxia%20type%207%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 (6)</a></div><h3 class="subhead">Clinical prediction guides</h3>
<div class="nl"><a target="_blank" href="/pubmed/32458086">Rare CACNA1A mutations leading to congenital ataxia.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Izquierdo-Serra M,
Fernández-Fernández JM,
Serrano M</span><br />
<span class="medgenPMjournal">Pflugers Arch</span>
2020 Jul;472(7):791-809.
Epub 2020 May 26
doi: 10.1007/s00424-020-02396-z.
<span class="bold">PMID: </span><a href="/pubmed/32458086" target="_blank">32458086</a></div>
<div class="nl"><a target="_blank" href="/pubmed/31115040">Cognitive impairment in children with CACNA1A mutations.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Humbertclaude V,
Riant F,
Krams B,
Zimmermann V,
Nagot N,
Annequin D,
Echenne B,
Tournier-Lasserve E,
Roubertie A;
Episodic Syndrome Consortium</span><br />
<span class="medgenPMjournal">Dev Med Child Neurol</span>
2020 Mar;62(3):330-337.
Epub 2019 May 21
doi: 10.1111/dmcn.14261.
<span class="bold">PMID: </span><a href="/pubmed/31115040" target="_blank">31115040</a></div>
<div class="nl"><a target="_blank" href="/pubmed/27733563">Dominant KCNA2 mutation causes episodic ataxia and pharmacoresponsive epilepsy.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Corbett MA,
Bellows ST,
Li M,
Carroll R,
Micallef S,
Carvill GL,
Myers CT,
Howell KB,
Maljevic S,
Lerche H,
Gazina EV,
Mefford HC,
Bahlo M,
Berkovic SF,
Petrou S,
Scheffer IE,
Gecz J</span><br />
<span class="medgenPMjournal">Neurology</span>
2016 Nov 8;87(19):1975-1984.
Epub 2016 Oct 12
doi: 10.1212/WNL.0000000000003309.
<span class="bold">PMID: </span><a href="/pubmed/27733563" target="_blank">27733563</a><a href="/pmc/articles/PMC5109949" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/24578548">Episodic ataxia type 1: clinical characterization, quality of life and genotype-phenotype correlation.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Graves TD,
Cha YH,
Hahn AF,
Barohn R,
Salajegheh MK,
Griggs RC,
Bundy BN,
Jen JC,
Baloh RW,
Hanna MG;
CINCH Investigators</span><br />
<span class="medgenPMjournal">Brain</span>
2014 Apr;137(Pt 4):1009-18.
Epub 2014 Feb 26
doi: 10.1093/brain/awu012.
<span class="bold">PMID: </span><a href="/pubmed/24578548" target="_blank">24578548</a><a href="/pmc/articles/PMC3959554" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/21734179">A randomized trial of 4-aminopyridine in EA2 and related familial episodic ataxias.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Strupp M,
Kalla R,
Claassen J,
Adrion C,
Mansmann U,
Klopstock T,
Freilinger T,
Neugebauer H,
Spiegel R,
Dichgans M,
Lehmann-Horn F,
Jurkat-Rott K,
Brandt T,
Jen JC,
Jahn K</span><br />
<span class="medgenPMjournal">Neurology</span>
2011 Jul 19;77(3):269-75.
Epub 2011 Jul 6
doi: 10.1212/WNL.0b013e318225ab07.
<span class="bold">PMID: </span><a href="/pubmed/21734179" target="_blank">21734179</a><a href="/pmc/articles/PMC3136055" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Episodic%20ataxia%20type%207%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 (12)</a></div></div>
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