A seizure is an abnormal and overtly strong condition of hyper-stimulated electrical activity in the brain.
Frequently sudden and occurring without warning, seizures are characterized by convulsions and spasms, altered cognition, and sometimes loss of consciousness.
Seizures can happen only once, but if they are repeatedly occurring then the individual may be diagnosed with epilepsy. Seizures can be divided into two categories: generalized and partial (or focal). Generalized seizures begin in both sides of the brain and include grand mal (tonic-clonic), petit mal (absence), and infantile spasms. Partial seizures begin in a localized and specific area of the brain. Sometimes they stay within the area they started and sometimes they spread to the rest of the brain. Causes of seizures include drug and alcohol withdrawal, stroke, brain tumors, brain injury, brain infection, eletcrolyte imbalance, blood sugar levels, cancer, and some medications. Seizures can also be induced by repeated flashing lights like a strobe light or in some video games.