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Nonepileptic seizures (pseudoseizures)

Repetitive abnormal posturing

Tetanus

Neuroleptic malignant syndrome

Rigors

Myoclonic jerks

Tremors

Involuntary movements including hemiballismus

Morbidity in generalized convulsive status epilepticus is related to the duration of the seizures and, importantly, to any underlying medical causes of the seizures. Modern definitions of generalized convulsive status epilepticus use a period as short as 5 minutes of continuous seizures to define the status and indicate the need to initiate treatment to terminate the seizures [30]. The other component of the definition is generalized seizures without recovery to full consciousness between seizures. There is a differential diagnosis for generalized convulsive status epilepticus (Box 17.4).