Seizures are sudden bursts of abnormal electrical activity in
the brain that may affect a person's muscle control, movement,
speech, vision, or awareness (consciousness). The effects of
seizures depend on a person's individual response, as well as
the seizure type, frequency, and severity. Some seizures make a
person fall to the ground in convulsions, in which the muscles
stiffen or jerk out of control. Others may stare as if in a
trance, have only a few muscle twitches, or sense a strange
smell or visual disturbance not experienced by anyone else.
Sometimes a seizure is a symptom of another medical problem,
such as a high fever (especially in children), a stroke,
infection, low blood sugar (hypoglycemia), very low blood
pressure, or a brain tumor. eMedicineHealth Medical Reference
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