Focal autonomic seizure - the most frequent autonomic symptom is gastrointestinal (~75%, including nausea, retching, vomiting), such that the seizure can mistaken for acute gastroenteritis or migraine. Other symptoms can be pupillary (e.g. mydriasis), thermoregulatory, circulatory (e.g. pallor, cyanosis) or cardiorespiratory (breathing and heart rate). There may be incontinence and excessive salivation. Apnoea, cardiac asystole and/or syncope can occur.
More than 70% of seizures occur from sleep. Seizures are often prolonged i.e. autonomic status epilepticus, lasting minutes to hours.
Seizures can progress to include head and eye deviation, loss of tone, impaired awareness, clonic (including hemiclonic) motor activity or to a focal to bilateral tonic-clonic seizure.
All other seizure types.