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Epilepsy Health Center

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Tonic seizures

Tonic seizures are fairly uncommon. They occur mostly in people with Lennox-Gastaut syndrome, a severe form of generalized epilepsy that begins during early childhood. (Children with Lennox-Gastaut syndrome may also have atonic seizures.)

When a tonic seizure occurs, the muscles in the body suddenly contract and the entire body stiffens. This occurs suddenly, without warning, and often causes the person to fall down.

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People who have tonic or atonic seizures are likely to be injured when they fall. Children may have to wear helmets and restrict their activities to prevent serious injury.

By Healthwise Staff
Primary Medical Reviewer Kathleen Romito, MD - Family Medicine
Specialist Medical Reviewer Steven C. Schachter, MD - Neurology
Last Revised October 15, 2009

WebMD Medical Reference from Healthwise

Last Updated: October 15, 2009
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.