How is myoclonus diagnosed?

The pediatrician will ask about the child’s medical history and general health. You should provide detailed information about your family’s medical history and about any medications or toxins (poisons) your child might have been exposed to. You should also try to observe whether the movements occur while the child is resting or moving, and whether they appear to be caused by light, sounds, touch, or other factors.

The doctor may order certain tests to learn what is causing the myoclonus. These may include:

  • Electroencephalogram, or EEG (a record of brain activity)
  • Electromyography (measures muscle activity and the electrical impulses associated with myoclonus)
  • Imaging tests, including MRI, CT scan, or PET scan, to look for abnormalities, such as a tumor or a lesion
  • Blood tests to see whether there are any medical conditions that could be causing the twitching

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