A type of epilepsy where seizures or abnormal electrical activity is limited to one side of the brain or one hemisphere.
From Greek 'hemi-' (half) + 'epilepsy' (from 'epilambanein,' to seize). The term describes epileptic activity that is lateralized or confined to one cerebral hemisphere.
Hemiepilepsy is a neurologist's clue—if seizures always start on one side, it points to a specific injury or lesion that side, which helps doctors target treatment without damaging the whole brain.
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