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</div><div><span>Focal seizure</span></div></div>
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<article><div id="d-article"><div class="page-info"><div class="page-title"><a name="start" id="start">
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</a><h1 class="with-also" itemprop="name">Focal seizure</h1>
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</noscript></div><div class="main"><div id="ency_summary"><p>All seizures are caused by abnormal electrical disturbances in the brain. Focal seizures occur when this electrical activity is in a limited area of the brain. Sometimes the seizures stay only in one part of the brain, while at other times, the seizures can turn into <a test="test" href="./000695.htm">bilateral tonic-clonic seizures</a>, which affect the whole brain. This is called secondary generalization.</p><p>Focal seizures can be divided into whether they affect awareness or not:</p><ul><li>Focal, aware</li><li>Focal, awareness impaired</li></ul><p>Focal seizures are also classified by whether they are motor (movements with the seizures) or not.</p></div><section><div class="section"><div class="section-header"><div class="section-title"><h2>Causes</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">
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</div></div><div class="section-body" id="section-1"><p>Focal seizures are the most common type of seizure in people 1 year and older. In people older than 65 who have blood vessel disease of the brain or brain tumors, focal seizures are very common. Focal seizures are usually associated with an area of the brain in which nerve cells are easily excitable. This is often due to brain injury that can result from conditions such as stroke, infection, trauma, or from problems present at birth.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Symptoms</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">
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</div></div><div class="section-body" id="section-2"><p>People with focal, awareness impaired seizures may or may not remember any or all of the symptoms or events during the seizure.</p><p>Depending on where in the brain the seizure starts, symptoms may include:</p><ul><li>Abnormal <a test="test" href="./003193.htm">muscle contraction</a>, such as abnormal head or limb movements</li><li>Staring spells, sometimes with repetitive movements such as picking at clothes or lip smacking</li><li>Eyes moving from side to side</li><li>Abnormal sensations, such as <a test="test" href="./003206.htm">numbness</a>, tingling, crawling sensation (like ants crawling on the skin)</li><li>Seeing, smelling, or sometimes hearing things that are not there (<a test="test" href="./003258.htm">hallucinations</a>)</li><li>Abdominal pain or discomfort</li><li>Nausea</li><li>Sweating</li><li><a test="test" href="./003241.htm">Flushed face</a></li><li>Dilated pupils</li><li><a test="test" href="./003077.htm">Rapid heart rate/pulse</a></li></ul><p>Other symptoms may include:</p><ul><li>Blackout spells, periods of time lost from memory</li><li><a test="test" href="./003029.htm">Changes in vision</a></li><li>Sensation of déjà vu (feeling like current place and time have been experienced before)</li><li><a test="test" href="./003213.htm">Changes in mood</a> or emotion</li><li>Temporary inability to speak </li></ul></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Exams and Tests</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">
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</div></div><div class="section-body" id="section-3"><p>Your health care provider will perform a physical exam. This will include a detailed look at the brain and nervous system.</p><p>An <a test="test" href="./003931.htm">electroencephalogram</a> (EEG) will be done to check the electrical activity in the brain. People with seizures often have abnormal electrical activity seen on this test. In some cases, the test shows the area in the brain where the seizures start. The brain may appear normal after a seizure or between seizures.</p><p>Blood and urine tests may also be ordered to check for other health problems that may be causing the seizures.</p><p><a test="test" href="./003786.htm">Head CT</a> or <a test="test" href="./003791.htm">MRI scan</a> may be done to find the cause and location of the problem in the brain.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Treatment</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">
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</div></div><div class="section-body" id="section-4"><p><a test="test" href="./000694.htm">Treatment</a> for focal seizures includes medicines, changes in lifestyle for <a test="test" href="../patientinstructions/000128.htm">adults</a> and <a test="test" href="../patientinstructions/000127.htm">children</a>, such as activity and diet, and sometimes surgery. Your provider can tell you more about these options.</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">
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</div></div><div class="section-body" id="section-Alt"><p>Jacksonian seizure; Seizure - partial (focal); Temporal lobe seizure; Epilepsy - partial seizures; Partial (focal) seizure</p></div></div></section><section><div class="section sec-mb"><div class="section-header"><div class="section-title"><h2>Patient Instructions</h2></div><div class="section-button"><button type="submit" aria-controls="section-carepnt" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div name="Patient Instructions" class="section-body" id="section-carepnt"><ul class="side-nav"><li><a href="../patientinstructions/000221.htm">Epilepsy in adults - what to ask your doctor</a></li>
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<li><a href="../patientinstructions/000222.htm">Epilepsy in children - what to ask your doctor</a></li>
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</ul></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">
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</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">
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</div></div><div class="section-body" id="section-Ref"><p>Abou-Khalil BW, Gallagher MJ, Macdonald RL. Epilepsies. In: Jankovic J, Mazziotta JC, Pomeroy SL, Newman NJ, eds. <em>Bradley and Daroff's Neurology in Clinical Practice</em>. 8th ed. Philadelphia, PA: Elsevier; 2022:chap 100.</p><p>Kanner AM, Ashman E, Gloss D, et al. Practice guideline update summary: efficacy and tolerability of the new antiepileptic drugs I: treatment of new-onset epilepsy: Report of the Guideline Development, Dissemination, and Implementation Subcommittee of the American Academy of Neurology and the American Epilepsy Society. <em>Neurology</em>. 2018;91(2):74-81. PMID: 29898971 <a href="https://pubmed.ncbi.nlm.nih.gov/29898971/" target="_blank">pubmed.ncbi.nlm.nih.gov/29898971/</a>.</p><p>Mikati MA, Tchapyjnikov D, Rathke KM. Seizures in childhood. In: Kliegman RM, St. Geme JW, Blum NJ, et al, eds. <em>Nelson Textbook of Pediatrics</em>. 22nd ed. Philadelphia, PA: Elsevier; 2025:chap 633.</p><p>Wiebe S. The epilepsies. In: Goldman L, Cooney KA, eds. <em>Goldman-Cecil Medicine</em>. 27th ed. Philadelphia, PA: Elsevier; 2024:chap 372. </p></div></div></section>
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<section><div class="section"><div class="section-header"><div class="section-title"><h2>Review Date 3/31/2024</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">
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<div id="section-version" class="section-body"><p>Updated by: Joseph V. Campellone, MD, Department of Neurology, Cooper Medical School at 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>
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