The type of seizure depends on which part and how much of the brain is affected and what happens during the seizure. The two broad categories of epileptic seizures are focal and generalized seizures.
If the abnormal burst of brain activity is generated from one single seizure focus, the seizure is a focal seizure and the condition is called focal epilepsy. If the burst is generated simultaneously from the brain's pacemaker, the thalamus, the condition is called primary generalized epilepsy because the seizure waves are generalized to the whole brain from the very beginning. If seizures are generated from multiple sources, the condition is called multifocal epilepsy.
Within these categories, there are several different types of seizures:
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