292 lines
No EOL
31 KiB
HTML
292 lines
No EOL
31 KiB
HTML
<!DOCTYPE html>
|
||
<html lang="en" id="article" class="nojs us" data-root="//medlineplus.gov" itemid="https://medlineplus.gov/ency/article/003927.htm" itemtype="http://schema.org/MedicalWebPage" itemscope="">
|
||
<head>
|
||
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"/>
|
||
<meta http-equiv="window-target" content="_top"/>
|
||
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
|
||
<meta charset="utf-8"/>
|
||
<meta property="fb:app_id" content="1042245625821448"/>
|
||
<meta name="expires" content="Wed, 05 02 2025"/>
|
||
<meta name="ac-dictionary" content="medlineplus-ac-dictionary"/>
|
||
<link rel="shortcut icon" href="https://medlineplus.gov/images/favicon.ico" type="image/x-icon"/>
|
||
<link rel="apple-touch-icon" href="//medlineplus.gov/images/touch-icon.png"/>
|
||
<meta name="viewport" content="width=device-width, initial-scale=1"/>
|
||
<link rel="stylesheet" href="https://medlineplus.gov/css/common_new.css?04272023"/>
|
||
<!--[if IE 8]> <link rel="stylesheet" href="https://medlineplus.gov/css/ie8/common.css"><![endif]-->
|
||
<link rel="stylesheet" href="https://medlineplus.gov/uswds/css/uswds_styles.css"/>
|
||
<link rel="stylesheet" href="https://medlineplus.gov/css/ency/ency2.css?07162024"/>
|
||
<script type="text/javascript">document.querySelector("html").className = document.querySelector("html").className.replace(/nojs[\s]*/g, '');</script>
|
||
<script src="https://medlineplus.gov/uswds/js/uswds-init.min.js" type="text/javascript">
|
||
</script>
|
||
<script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='//www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-MMVM77');</script>
|
||
<link rel="canonical" href="https://medlineplus.gov/ency/article/003927.htm" itemprop="url"/>
|
||
<link rel="alternative" hreflang="es" href="https://medlineplus.gov/spanish/ency/article/003927.htm"/>
|
||
<link rel="alternative" hreflang="en" href="https://medlineplus.gov/ency/article/003927.htm"/><meta property="og:title" content="Nerve conduction velocity: MedlinePlus Medical Encyclopedia"/><meta property="og:url" content="https://medlineplus.gov/ency/article/003927.htm"/><meta property="twitter:title" content="Nerve conduction velocity: MedlinePlus Medical Encyclopedia"/><meta name="twitter:card" content="summary_large_image"/><meta name="description" content="Nerve conduction velocity (NCV) is a test to see how fast electrical signals move through a nerve. This test is done along with electromyography (EMG) to assess the muscles for abnormalities."/><meta itemprop="description" name="description" content="Nerve conduction velocity (NCV) is a test to see how fast electrical signals move through a nerve. This test is done along with electromyography (EMG) to assess the muscles for abnormalities."/><meta property="og:description" content="Nerve conduction velocity (NCV) is a test to see how fast electrical signals move through a nerve. This test is done along with electromyography (EMG) to assess the muscles for abnormalities."/><meta property="twitter:description" content="Nerve conduction velocity (NCV) is a test to see how fast electrical signals move through a nerve. This test is done along with electromyography (EMG) to assess the muscles for abnormalities."/><meta property="og:image" content="https://medlineplus.gov/images/share_ency_1.jpg"/><meta property="og:image" content="https://medlineplus.gov/images/share_ency_2.jpg"/><meta property="og:image" content="https://medlineplus.gov/images/share_ency_3.jpg"/><meta property="twitter:image" content="https://medlineplus.gov/images/share_ency_1.jpg"/>
|
||
<title>Nerve conduction velocity: MedlinePlus Medical Encyclopedia</title>
|
||
</head>
|
||
<body><link href="http://schema.org/Patient" itemprop="audience"/>
|
||
<!-- Google Tag Manager -->
|
||
<noscript><iframe title="googletagmanager" src="//www.googletagmanager.com/ns.html?id=GTM-MMVM77" height="0" width="0" style="display:none;visibility:hidden">
|
||
</iframe>
|
||
</noscript>
|
||
<!-- End Google Tag Manager -->
|
||
<a name="top" id="top">
|
||
</a>
|
||
<a class="hide-offscreen" href="#start">Skip navigation</a>
|
||
<section class="usa-banner" aria-label="Official website of the United States government">
|
||
<div class="usa-accordion">
|
||
<header class="usa-banner__header">
|
||
<div class="usa-banner__inner">
|
||
<div class="grid-col-auto">
|
||
<img aria-hidden="true" class="usa-banner__header-flag" src="https://medlineplus.gov/uswds/img/us_flag_small.png" alt=""/>
|
||
</div>
|
||
<div class="grid-col-fill tablet:grid-col-auto" aria-hidden="true">
|
||
<p class="usa-banner__header-text">
|
||
An official website of the United States government
|
||
</p>
|
||
<p class="usa-banner__header-action">Here’s how you know</p>
|
||
</div>
|
||
<button type="button" class="usa-accordion__button usa-banner__button" aria-expanded="false" aria-controls="gov-banner-default-default">
|
||
<span class="usa-banner__button-text">Here’s how you know</span>
|
||
</button>
|
||
</div>
|
||
</header>
|
||
<div class="usa-banner__content usa-accordion__content" id="gov-banner-default-default">
|
||
<div class="grid-row grid-gap-lg">
|
||
<div class="usa-banner__guidance tablet:grid-col-6">
|
||
<img class="usa-banner__icon usa-media-block__img" src="https://medlineplus.gov/uswds/img/icon-dot-gov.svg" role="img" alt="" aria-hidden="true"/>
|
||
<div class="usa-media-block__body">
|
||
<p>
|
||
<strong>Official websites use .gov</strong><br/>A
|
||
<strong>.gov</strong> website belongs to an official government
|
||
organization in the United States.
|
||
</p>
|
||
</div>
|
||
</div>
|
||
<div class="usa-banner__guidance tablet:grid-col-6">
|
||
<img class="usa-banner__icon usa-media-block__img" src="https://medlineplus.gov/uswds/img/icon-https.svg" role="img" alt="" aria-hidden="true"/>
|
||
<div class="usa-media-block__body">
|
||
<p>
|
||
<strong>Secure .gov websites use HTTPS</strong><br/>A
|
||
<strong>lock</strong> (
|
||
<span class="icon-lock"><svg xmlns="http://www.w3.org/2000/svg" width="52" height="64" viewBox="0 0 52 64" class="usa-banner__lock-image" role="img" aria-labelledby="banner-lock-description-default" focusable="false">
|
||
<title id="banner-lock-title-default">Lock</title>
|
||
<desc id="banner-lock-description-default">Locked padlock icon</desc>
|
||
<path fill="#000000" fill-rule="evenodd" d="M26 0c10.493 0 19 8.507 19 19v9h3a4 4 0 0 1 4 4v28a4 4 0 0 1-4 4H4a4 4 0 0 1-4-4V32a4 4 0 0 1 4-4h3v-9C7 8.507 15.507 0 26 0zm0 8c-5.979 0-10.843 4.77-10.996 10.712L15 19v9h22v-9c0-6.075-4.925-11-11-11z">
|
||
</path>
|
||
</svg> </span>) or <strong>https://</strong> means you’ve safely connected to
|
||
the .gov website. Share sensitive information only on official,
|
||
secure websites.
|
||
</p>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<div id="mplus-wrap">
|
||
<header>
|
||
<div id="mplus-header">
|
||
<!-- Orgs
|
||
================================================== -->
|
||
<div id="mplus-orgs">
|
||
<a title="National Institutes of Health" target="_blank" class="nih-org" href="//www.nih.gov/">
|
||
<img alt="National Institutes of Health" src="https://medlineplus.gov/images/nihlogo.png" class="nihlogo"/>
|
||
</a><a target="_blank" href="https://www.nlm.nih.gov/"> National Library of Medicine </a>
|
||
</div>
|
||
<!-- Logo
|
||
================================================== -->
|
||
<div id="mplus-logo" class="years-25">
|
||
<a href="https://medlineplus.gov">
|
||
<img src="https://medlineplus.gov/images/m_logo_25.png" title="MedlinePlus Trusted Health Information for You" alt="MedlinePlus Trusted Health Information for You"/>
|
||
</a>
|
||
</div>
|
||
<!-- Nav Menu
|
||
================================================== -->
|
||
<div id="mplus-nav">
|
||
<div class="sm-live-area hide-offscreen" aria-live="polite">The navigation menu has been collapsed.</div>
|
||
<!-- Menu Button-->
|
||
<button type="submit" aria-controls="mplus-menu-list" role="button" title="Menu" class="navmenu-btn" id="sm-menu-btn" aria-pressed="false" tabindex="0">Menu<span class="icon icon-nav-menu">
|
||
</span></button><ul class="nav-list" id="mplus-menu-list">
|
||
<li><a href="https://medlineplus.gov/healthtopics.html">Health Topics</a></li>
|
||
<li><a href="https://medlineplus.gov/druginformation.html">Drugs & Supplements</a></li>
|
||
<li><a href="https://medlineplus.gov/genetics/">Genetics</a></li>
|
||
<li><a href="https://medlineplus.gov/lab-tests/">Medical Tests</a></li>
|
||
<li><a href="https://medlineplus.gov/encyclopedia.html">Medical Encyclopedia</a></li>
|
||
<li><a href="https://medlineplus.gov/about/">About MedlinePlus</a></li>
|
||
</ul><button type="submit" aria-controls="mplus-search" role="button" title="Search" class="navmenu-btn" id="sm-search-btn" aria-pressed="false" tabindex="0"><span class="hide-offscreen">Show </span>Search<span class="icon icon-nav-search">
|
||
</span></button>
|
||
<div class="top-1">
|
||
<!-- Search
|
||
================================================== -->
|
||
<form target="_self" title="Search MedlinePlus" action="//vsearch.nlm.nih.gov/vivisimo/cgi-bin/query-meta" method="get" id="mplus-search">
|
||
<input type="hidden" value="medlineplus" name="v:project"/>
|
||
<input type="hidden" value="medlineplus-bundle" name="v:sources"/>
|
||
<div class="form-box text-combo">
|
||
<div class="form-area"><label for="searchtext_primary" class="hide-offscreen">Search MedlinePlus</label>
|
||
<span role="status" aria-live="polite" class="ui-helper-hidden-accessible">
|
||
</span><input type="text" aria-haspopup="true" aria-autocomplete="list" role="textbox" autocomplete="off" name="query" size="40" maxlength="400" title="Site Search input" alt="Site Search input" placeholder="Search MedlinePlus" class="form-text ui-autocomplete-input" id="searchtext_primary"/>
|
||
</div>
|
||
<div class="button-area">
|
||
<button type="submit" alt="Search MedlinePlus" title="Search MedlinePlus" class="form-btn">GO</button>
|
||
</div>
|
||
</div>
|
||
</form>
|
||
<!-- Secondary Nav
|
||
================================================== -->
|
||
<div class="secondarynav">
|
||
<ul class="nav-list">
|
||
<li><a href="https://medlineplus.gov/about/"><span>About MedlinePlus</span></a></li>
|
||
<li><a href="https://medlineplus.gov/whatsnew/"><span>What's New</span></a></li>
|
||
<li><a href="https://medlineplus.gov/sitemap.html"><span>Site Map</span></a></li>
|
||
<li><a target="_blank" href="https://support.nlm.nih.gov/knowledgebase/category/?id=CAT-01231&category=medlineplus&from=//medlineplus.gov/ency/article/003927.htm"><span>Customer Support</span></a></li>
|
||
</ul>
|
||
</div>
|
||
</div>
|
||
<!-- Nav Bar
|
||
================================================== -->
|
||
<div id="mplus-nav-bar">
|
||
<ul class="nav-list">
|
||
<li><a href="https://medlineplus.gov/healthtopics.html">Health Topics</a></li><li><a href="https://medlineplus.gov/druginformation.html">Drugs & Supplements</a></li><li><a href="https://medlineplus.gov/genetics/">Genetics</a></li><li><a href="https://medlineplus.gov/lab-tests/">Medical Tests</a></li><li><a href="https://medlineplus.gov/encyclopedia.html">Medical Encyclopedia</a></li>
|
||
</ul>
|
||
</div>
|
||
<a title="Español" id="mplus-lang-toggle" href="../../spanish/ency/article/003927.htm">Español</a>
|
||
</div>
|
||
</div>
|
||
</header>
|
||
<!-- Content
|
||
================================================== -->
|
||
<div id="mplus-content">
|
||
<!-- Breadrcumbs -->
|
||
<div id="breadcrumbs"><div itemtype="http://schema.org/BreadcrumbList" itemscope="" itemprop="breadcrumb"><span class="hide-offscreen">You Are Here:</span>
|
||
<div itemscope itemprop="itemListElement" itemtype="http://schema.org/ListItem">
|
||
<a href="https://medlineplus.gov" itemprop="item"><span itemprop="name">Home</span></a>
|
||
→
|
||
<meta itemprop="position" content="1"/>
|
||
</div>
|
||
|
||
<div itemscope itemprop="itemListElement" itemtype="http://schema.org/ListItem">
|
||
<a href="https://medlineplus.gov/encyclopedia.html" itemprop="item"><span itemprop="name">Medical Encyclopedia</span></a>
|
||
→
|
||
<meta itemprop="position" content="2"/>
|
||
</div>
|
||
</div><div><span>Nerve conduction velocity</span></div></div>
|
||
<span class="page-url print-only">URL of this page: //medlineplus.gov/ency/article/003927.htm
|
||
</span>
|
||
<!-- Article -->
|
||
<article><div id="d-article"><div class="page-info"><div class="page-title"><a name="start" id="start">
|
||
</a><h1 class="with-also" itemprop="name">Nerve conduction velocity</h1>
|
||
</div><div class="page-actions">
|
||
</div>
|
||
<noscript>
|
||
<span class="js-disabled-message">To use the sharing features on this page, please enable JavaScript.</span>
|
||
</noscript></div><div class="main"><div id="ency_summary"><p>Nerve conduction velocity (NCV) is a test to see how fast electrical signals move through a nerve. This test is done along with <a test="test" href="./003929.htm">electromyography (EMG)</a> to assess the muscles for abnormalities.</p></div><section><div class="section"><div class="section-header"><div class="section-title"><h2>How the Test is Performed</h2></div><div class="section-button"><button type="submit" aria-controls="section-1" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
|
||
</span></button></div><div class="sm-live-area hide-offscreen" aria-live="polite">
|
||
</div></div><div class="section-body" id="section-1"><p>Adhesive patches called surface electrodes are placed on the skin over nerves or muscles at different spots. A very mild electrical impulse is applied via other patches or a handheld stimulator to stimulate the nerve.</p><p>The resulting electrical activity of the nerve is recorded by the electrodes. The distance between electrodes and the time it takes for electrical impulses to travel between electrodes are used to measure the speed of the nerve signals. It is normal for several different nerves to be tested. </p><p>EMG is the recording from needles placed into the muscles. This is often done during the same visit as NCV.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>How to Prepare for the Test</h2></div><div class="section-button"><button type="submit" aria-controls="section-2" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
|
||
</span></button></div><div class="sm-live-area hide-offscreen" aria-live="polite">
|
||
</div></div><div class="section-body" id="section-2"><p>You must stay at a normal body temperature. Being too cold alters nerve conduction and can give false results.</p><p>Tell your health care provider if you have a cardiac defibrillator or pacemaker, or other implanted device such as a deep brain stimulator. Special steps may need to be taken before the test if you have one of these devices.</p><p>Do not wear any lotions, sunscreen, perfume, or moisturizer on your body on the day of the test.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>How the Test will Feel</h2></div><div class="section-button"><button type="submit" aria-controls="section-3" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
|
||
</span></button></div><div class="sm-live-area hide-offscreen" aria-live="polite">
|
||
</div></div><div class="section-body" id="section-3"><p>The impulse may feel like an electric shock. You may feel some discomfort depending on how strong the impulse is. You should feel no pain once the test is finished. </p><p>Often, the nerve conduction test is followed by EMG. In this test, a needle is placed into a muscle and you are told to contract that muscle. This process can be uncomfortable during the test. You may have muscle soreness or bruising after the test at the site where the needle was inserted.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Why the Test is Performed</h2></div><div class="section-button"><button type="submit" aria-controls="section-4" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
|
||
</span></button></div><div class="sm-live-area hide-offscreen" aria-live="polite">
|
||
</div></div><div class="section-body" id="section-4"><p>This test is used to diagnose nerve damage or destruction. The test may sometimes be used to evaluate diseases of nerve or muscle, including: </p><ul><li>Myopathy</li><li>Lambert-Eaton syndrome</li><li>Myasthenia gravis</li><li>Carpal tunnel syndrome</li><li>Tarsal tunnel syndrome</li><li>Diabetic neuropathy</li><li>Bell palsy</li><li>Guillain-Barré syndrome</li><li>Brachial plexopathy</li></ul></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Normal Results</h2></div><div class="section-button"><button type="submit" aria-controls="section-5" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
|
||
</span></button></div><div class="sm-live-area hide-offscreen" aria-live="polite">
|
||
</div></div><div class="section-body" id="section-5"><p>NCV is related to the diameter of the nerve and the degree of myelination (the presence of a myelin sheath on the nerve fiber) of the nerve. Newborn infants have values that are approximately half that of adults. Adult values are normally reached by age 3 or 4.</p><p>Note: Normal value ranges may vary slightly among different laboratories. Talk to your provider about the meaning of your specific test results.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>What Abnormal Results Mean</h2></div><div class="section-button"><button type="submit" aria-controls="section-6" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
|
||
</span></button></div><div class="sm-live-area hide-offscreen" aria-live="polite">
|
||
</div></div><div class="section-body" id="section-6"><p>Most often, abnormal results are due to nerve damage or destruction, including:</p><ul><li>Axonopathy (damage to the long portion of the nerve cell)</li><li>Conduction block (the impulse is blocked somewhere along the nerve pathway)</li><li>Demyelination (damage and loss of the fatty insulation surrounding the nerve cell) </li></ul><p>The nerve damage or destruction may be due to many different conditions, including:</p><ul><li>Alcoholic neuropathy</li><li>Diabetic neuropathy</li><li>Nerve effects of uremia (from kidney failure)</li><li>Traumatic injury to a nerve</li><li>Guillain-Barré syndrome</li><li>Diphtheria</li><li>Carpal tunnel syndrome</li><li>Brachial plexopathy</li><li>Charcot-Marie-Tooth disease (hereditary)</li><li>Chronic inflammatory polyneuropathy</li><li>Common peroneal/fibular nerve dysfunction</li><li>Distal median nerve dysfunction</li><li>Femoral nerve dysfunction</li><li>Friedreich ataxia</li><li>Mononeuritis multiplex (multiple mononeuropathies)</li><li>Primary amyloidosis</li><li>Radial nerve dysfunction</li><li>Sciatic nerve dysfunction</li><li>Secondary systemic amyloidosis</li><li>Sensorimotor polyneuropathy</li><li>Tibial nerve dysfunction</li><li>Ulnar nerve dysfunction </li></ul><p>Any peripheral neuropathy can cause abnormal results. Damage to the spinal cord and disk herniation (herniated nucleus pulposus) with nerve root compression can also cause abnormal results.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Considerations</h2></div><div class="section-button"><button type="submit" aria-controls="section-7" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
|
||
</span></button></div><div class="sm-live-area hide-offscreen" aria-live="polite">
|
||
</div></div><div class="section-body" id="section-7"><p>An NCV test shows the condition of the best surviving nerve fibers. Therefore, in some cases the results may be normal, even if there is nerve damage.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Alternative Names</h2></div><div class="section-button"><button type="submit" aria-controls="section-Alt" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
|
||
</span></button></div><div class="sm-live-area hide-offscreen" aria-live="polite">
|
||
</div></div><div class="section-body" id="section-Alt"><p>NCV; Nerve conduction study (NCS)</p></div></div></section><section><div class="section sec-mb"><div class="section-header"><div class="section-title"><h2>Images</h2></div><div class="section-button"><button type="submit" aria-controls="section-tnails" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
|
||
</span></button></div><div class="sm-live-area hide-offscreen" aria-live="polite">
|
||
</div></div><div name="Images" class="section-body" id="section-tnails"><ul class="img-grid group">
|
||
<li><img src="//medlineplus.gov/ency/images/ency/tnails/9743t.jpg" alt="Nerve conduction test" title="Nerve conduction test" class="side-img"/><a href="../imagepages/9743.htm">Nerve conduction test</a></li>
|
||
</ul></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>References</h2></div><div class="section-button"><button type="submit" aria-controls="section-Ref" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
|
||
</span></button></div><div class="sm-live-area hide-offscreen" aria-live="polite">
|
||
</div></div><div class="section-body" id="section-Ref"><p>Deluca GC, Griggs RC. Approach to the patient with neurologic disease. In: Goldman L, Schafer AI, eds. <em>Goldman-Cecil Medicine</em>. 26th ed. Philadelphia, PA: Elsevier; 2020:chap 368.</p><p>Nuwer MR, Pouratian N. Monitoring of neural function: electromyography, nerve conduction, and evoked potentials. In: Winn HR, ed. <em>Youmans and Winn Neurological Surgery</em>. 8th ed. Philadelphia, PA: Elsevier; 2023:chap 274.</p></div></div></section>
|
||
<section><div class="section"><div class="section-header"><div class="section-title"><h2>Review Date 4/29/2023</h2></div><div class="section-button"><button type="submit" aria-controls="section-version" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
|
||
</span></button></div><div class="sm-live-area hide-offscreen" aria-live="polite">
|
||
</div></div>
|
||
<div id="section-version" class="section-body"><p>Updated by: Joseph V. Campellone, MD, Department of Neurology, Cooper Medical School of Rowan University, Camden, NJ. Review provided by VeriMed Healthcare Network. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.</p>
|
||
</div></div></section><section><div class="section ency-citation"><div class="section-header"><div class="section-title ency-citation"><div id="citation-how-to"><button><span>Learn how to cite this page</span></button></div></div><div class="sm-live-area hide-offscreen" aria-live="polite">
|
||
</div></div></div></section><section><div class="section sec-mb"><div class="section-header"><div class="section-title"><h2>Related MedlinePlus Health Topics</h2></div><div class="section-button"><button type="submit" aria-controls="section-mtp" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
|
||
</span></button></div><div class="sm-live-area hide-offscreen" aria-live="polite">
|
||
</div></div><div name="Related MedlinePlus Health Topics" class="section-body" id="section-mtp"><ul class="side-nav"><li><a href="https://medlineplus.gov/neurologicdiseases.html">Neurologic Diseases</a></li>
|
||
|
||
|
||
</ul></div></div></section></div></div></article>
|
||
</div>
|
||
<footer>
|
||
|
||
<div class="provider-box group">
|
||
<div class="urac-logo">
|
||
<a href="https://accreditnet.urac.org/directory/#/certification/HCP-2/info"><img src="https://medlineplus.gov/images/CertifiedSeal.png"/></a>
|
||
<p class="urac-logo-info">Health Content Provider<br>06/01/2025</p>
|
||
</div>
|
||
<p class="adam-info">
|
||
<a href='javascript:urac_open();'>A.D.A.M., Inc. is accredited by URAC</a>, for Health Content Provider (www.urac.org). URAC's <a href='javascript:hwsopen();'>accreditation program</a> is an independent audit to verify that A.D.A.M. follows rigorous standards of quality and accountability. A.D.A.M. is among the first to achieve this important distinction for online health information and services. Learn more about A.D.A.M.'s <a href='javascript:edpolopen();'>editorial policy, editorial process</a>, and <a href='javascript:ppopen();'>privacy policy</a>. A.D.A.M. is also a founding member of Hi-Ethics. This site complies with the HONcode standard for trustworthy health information: <a href='javascript:honc_open();'>verify here</a>.
|
||
</p>
|
||
</div>
|
||
<p class="adam-info">
|
||
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only – they do not constitute endorsements of those other sites. No warranty of any kind, either expressed or implied, is made as to the accuracy, reliability, timeliness, or correctness of any translations made by a third-party service of the information provided herein into any other language. © 1997-2025 A.D.A.M., a business unit of Ebix, Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
|
||
</p>
|
||
<div class="adam-logo">
|
||
<a href="https://www.adam.com/about" target="_blank"><img width="49" height="10" alt="About A.D.A.M." src="https://medlineplus.gov/ency/images/ency/ftrAdamlogo.gif"/></a>
|
||
</div>
|
||
<div id="mplus-footer">
|
||
<div class="footer1">
|
||
<ul class="secondarynav">
|
||
<li><a href="https://medlineplus.gov/about/">About MedlinePlus</a></li>
|
||
<li><a href="https://medlineplus.gov/whatsnew/">What's New</a></li>
|
||
<li><a href="https://medlineplus.gov/sitemap.html">Site Map</a></li>
|
||
<li><a name="contact" target="_blank" href="https://support.nlm.nih.gov/knowledgebase/category/?id=CAT-01231&category=medlineplus&from="><span>Customer Support</span></a></li>
|
||
</ul>
|
||
<ul class="follow-footer">
|
||
<li><a href="https://medlineplus.gov/rss.html" class="follow-item">Subscribe to RSS<img src="https://medlineplus.gov/images/feed.png" class="social-media-toolkit-icon" alt="RSS" title="RSS"></a></li>
|
||
<li><span class="follow-label">Follow us</span>
|
||
<a href="https://twitter.com/medlineplus" class="follow-item" target="_blank"><img src="https://medlineplus.gov/images/i_share_twitter.png" class="follow-icon" alt="X" title="X"></a>
|
||
<a href="https://facebook.com/Mplus.gov/" class="follow-item" target="_blank"><img src="https://medlineplus.gov/images/i_share_fb.png" class="follow-icon" alt="Facebook" title="Facebook"></a>
|
||
<a href="https://www.instagram.com/mplusgov/" class="follow-item" target="_blank"><img src="https://medlineplus.gov/images/Instagram_Glyph_Gradient_RGB.png" class="follow-icon" alt="Instagram" title="Instagram"></a>
|
||
</li>
|
||
<li><a href="https://medlineplus.gov/social-media-toolkit/" class="social-media-toolkit-item">Social Media Toolkit<img src="https://medlineplus.gov/images/i_social_media_toolkit.png" class="social-media-toolkit-icon" alt="Social Media Toolkit" title="Social Media Toolkit"></a></li>
|
||
</ul>
|
||
</div>
|
||
<div class="footer2">
|
||
<ul>
|
||
<li><a href="https://www.nlm.nih.gov/web_policies.html" target="_blank">NLM Web Policies</a></li>
|
||
<li><a href="https://medlineplus.gov/about/using/usingcontent/" >Copyright</a></li>
|
||
<li><a href="//medlineplus.gov/accessibility.html">Accessibility</a></li>
|
||
<li><a href="https://medlineplus.gov/about/using/criteria/">Guidelines for Links</a></li>
|
||
<li><a href="//medlineplus.gov/plugins.html">Viewers & Players</a></li>
|
||
<li><a href="https://www.hhs.gov/vulnerability-disclosure-policy/index.html" target="_blank">HHS Vulnerability Disclosure</a></li>
|
||
<li><a href="https://medlineplus.gov/medlineplus-connect/">MedlinePlus Connect for EHRs</a></li>
|
||
<li><a href="https://medlineplus.gov/about/developers/">For Developers</a></li>
|
||
</ul>
|
||
<div class="address">
|
||
<a href="//www.nlm.nih.gov" target="_blank">National Library of Medicine</a>
|
||
<span>8600 Rockville Pike, Bethesda, MD 20894</span>
|
||
<a href="//www.hhs.gov" target="_blank">U.S. Department of Health and Human Services</a>
|
||
<a href="//www.nih.gov" target="_blank">National Institutes of Health</a>
|
||
</div>
|
||
<div class="return-top"><a href="#top" title="Return to top"><img class="return-top-icon" alt="Return to top" src="https://medlineplus.gov/images/return-top.png"></a></div>
|
||
</div>
|
||
</div>
|
||
|
||
</footer>
|
||
</div><!-- End Wrap -->
|
||
<script src="https://medlineplus.gov/jslib/jquery-3.6.0.min.js" type="text/javascript">
|
||
</script>
|
||
<script src="https://medlineplus.gov/jslib/mplus-frontend-controls.js" type="text/javascript">
|
||
</script>
|
||
<!--[if lte IE 9]>
|
||
<script src="https://medlineplus.gov/jslib/jquery.placeholder.js" type="text/javascript"></script>
|
||
<![endif]-->
|
||
<script src="https://medlineplus.gov/jslib/mplus-share.js?id=1112022" type="text/javascript">
|
||
</script>
|
||
<script src="https://medlineplus.gov/jslib/control.js" type="text/javascript">
|
||
</script>
|
||
<script src="https://medlineplus.gov/uswds/js/uswds.min.js" type="text/javascript">
|
||
</script>
|
||
<script src="https://medlineplus.gov/jslib/ency/ency.js" type="text/javascript">
|
||
</script>
|
||
</body>
|
||
</html> |