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Determining whether a seizure has a focal or generalized onset is often
important both for diagnostic and therapeutic purposes.
Focal Seizures imply that the seizure begins
in a certain area of the brain, which is often manifested by activity of the
functions that area controls. Focal seizures may or may not generalize. The
focality of the seizure more often implies a structural problem such as an
arteriovenous
malformation, stroke or tumor.
Primary Generalized
Seizures involve the entire
brain and loss of consciousness always occurs. Most often, generalized seizures
are inherited, metabolic, toxic or drug-induced.
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Signs and Symptoms Suggesting Focal Onset
• Any aura (olfactory, gustatory, emotional)
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Shaking of one limb or side of the body
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Sensory symptoms of one limb or side of the body
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Lateral eye deviation
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Lateral neck deviation
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Any focal neurologic sign in the post-ictal state
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