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Epilepsy: Myoclonic Seizures - Topic Overview

Myoclonic seizures affect a small number of children and adults with generalized epilepsy of unknown cause (idiopathic). In children and teens with juvenile myoclonic epilepsy, the seizures seem to occur most often after waking up or while falling asleep.

During a myoclonic seizure:

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Understanding Seizures -- Diagnosis and Treatment

To diagnose an apparent first-time seizure, your doctor will: Take a detailed medical history (including a family history of seizures). Gather information about your behavior before, during, and after the episode. It is very important to have someone with you who witnessed the episode and can describe it to the doctor. Do a physical exam These are tests that may be done: An electroencephalogram (EEG) to identify any abnormal electrical misfiring in the brain and help predict t...

Read the Understanding Seizures -- Diagnosis and Treatment article > >

  • The arms, legs, torso, or facial muscles jerk rapidly as though they are being shocked.
  • The body may jerk once or many times, on one or both sides of the body, in a rhythmic or random pattern.
  • The person usually does not lose consciousness.

Myoclonic seizures are almost always very brief.

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WebMD Medical Reference from Healthwise

Last Updated: August 26, 2011
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.
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