Focal hemiclonic seizure

What it means

A type of focal clonic seizure characterized by sustained rhythmic jerking rapidly involves one side of the body at seizure onset.

A seizure type typically occurring in certain epilepsy syndromes, such as Dravet syndrome and self-limited neonatal seizures.

Rare diseases that can present with this4

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Hemiclonic seizure · Hemiclonic seizures · Unilateral clonic seizure · Unilateral clonic seizures