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General Myoclonus

Abstract

You are reading a NORD Rare Disease Report Abstract. NORD’s full collection of reports on over 1200 rare diseases is available to subscribers (click here for details). We are now also offering two full rare disease reports per day to visitors on our Web site.

NORD is very grateful to John N. Caviness, MD, Professor of Neurology, Mayo Clinic College of Medicine, for assistance in the preparation of this report.

Synonyms of General Myoclonus

  • No synonyms found.

Disorder Subdivisions

  • action myoclonus
  • arrhythmic myoclonus
  • cortical myoclonus
  • cortical-subcortical myoclonus
  • dyssynergia cerebellaris myoclonica
  • familial arrhythmic myoclonus
  • hereditary essential myoclonus
  • infantile myoclonic encephalopathy and polymyoclonia
  • intention myoclonus
  • Lance-Adams syndrome
  • myoclonic epilepsy
  • nocturnal myoclonus
  • opsoclonus
  • palatal myoclonus
  • paramyoclonus multiple
  • pathological myoclonus
  • peripheral myoclonus
  • postanoxic intention myoclonus
  • postencephalitic intention myoclonus
  • progressive myoclonic epilepsy
  • respiratory myoclonus
  • rhythmical myoclonus
  • segmental myoclonus
  • stimulus-sensitive myoclonus
  • subcortical/non-segmental myoclonus

General Discussion

Myoclonus is the term used to describe the sudden, involuntary jerking of a muscle or group of muscles caused by muscle contractions (positive myoclonus) or muscle relaxation (negative myoclonus). The twitching or jerking of muscles cannot be controlled by the person experiencing it. Myoclonic jerks may occur infrequently or many times a minute. They sometimes occur in response to an external event or when a person attempts to make a movement. By itself, myoclonus may be seen as a symptom rather than a disease. To some degree, it may occur occasionally to otherwise healthy people. (For instance, hiccups may be considered a type of myoclonus.) In severe cases, it can interfere with movement control and balance, and limit various everyday activities such as eating or talking.

General Myoclonus Resources

Organizations:

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