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medical : a disorder of the nervous system that can cause people to suddenly become unconscious and to have violent, uncontrolled movements of the body
Full Definition of EPILEPSY
: any of various disorders marked by abnormal electrical discharges in the brain and typically manifested by sudden brief episodes of altered or diminished consciousness, involuntary movements, or convulsions
Middle English epilencie, from Anglo-French & Latin; Anglo-French epelempsie, modification of Late Latin epilepsia, from Greek epilēpsia, from epilambanein to seize, from epi- + lambanein to take, seize — more at latch
Neurological disorder caused by paroxysmal malfunction of neurons in the brain (seizures). It is characterized by strange movements or sensations in parts of the body, odd behaviours, emotional disturbances, and sometimes convulsions and momentary lapses of consciousness. Seizures may result from abnormal electrical activity in most or all of the brain (generalized), or they may originate in a specific brain area (partial). Causes include brain tumours, infections, genetic or developmental abnormalities, stroke, and head trauma, although no cause can be found in most cases. Treatment is usually with anticonvulsant medications; brain surgery may be beneficial if drugs cannot control seizures.