A<unk> , commonly known as a grand mal seizure or GTCS, is a type of<unk>  seizure that produces bilateral, convulsive<unk>  and<unk>  muscle contractions.<unk><unk><unk>  seizures are the seizure type most commonly associated with epilepsy and seizures in general and the most common seizure associated with metabolic imbalances. It is a misconception that they are the sole type of seizure, as they are the main seizure type in approximately 10% of those with epilepsy. These seizures typically initiate abruptly with either a focal or<unk>  onset. A prodrome (a vague sense of impending seizure) may also be present before the seizure begins. The seizure itself includes both<unk>  and<unk>  contractions, with<unk>  contractions usually preceding<unk>  contractions. After these series of contractions, there is an extended postictal state where the person is unresponsive and commonly sleeping with loud snoring. There is usually pronounced confusion upon awakening.
Generalized tonic–clonic seizure
Reflex seizure
Intercalated seizure
Absence seizure
Focal seizure
Atonic seizure
Status epilepticus
Febrile seizure