Definition: A type of seizure that is characterized by a loss of muscle tone. These seizures are usually sudden and result in a brief loss of consciousness.
These attacks may cause people to fall suddenly or drop their head forward.
Atonic Seizure
From Reza Shouri, MD, former About.com Guide
Updated September 08, 2008
About.com Health's Disease and Condition content is reviewed by the Medical Review Board
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