The result is an epileptic seizure. Seizures can be generalized or partial.
Generalized seizures involve the whole brain.
One form is a convulsion, which results in a complete lack of consciousness. Another form appears to the onlooker like a brief period of fixed staring. Partial seizures are localized in one part of the brain. They may involve voluntary movements or temporary changes in the way things look, taste, sound, feel or smell. Some partial seizures produce periods of automatic behavior and altered consciousness.