ILAE Logo
Epilepsy Diagnosis Logo

ATONIC SEIZURE

An atonic seizure involves sudden loss or diminution of muscle tone without apparent preceding myoclonic or tonic features. Atonic seizures are very brief (<2 seconds) and may involve the head, trunk or limbs. Atonic seizures often occur in individuals with intellectual impairment.

NOTE Atonic seizures are one type of seizure that can result in a "drop attack", other causes of drop attacks include myoclonic (especially in younger children), tonic and myoclonic-atonic seizures.

Feedback | Home | Contact Us | Privacy | Terms & Conditions of Use | Log In For Videos
Creative Commons License
This website is owned by the International League Against Epilepsy. Text on this website, last updated July 15, 2022,
is available under a Creative Commons Attribution-ShareAlike 4.0 International License,
EXCEPTING all videos and images, which remain copyrighted by the International League Against Epilepsy.