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myokymia

Etiology: - successive & rapid contractions of motor units associated with chronic nerve injury - discharges arise from the peripheral aspects of regenerating nerves Genetics: - associated with defects in KCNA1 (myokymia isolated type 1) Clinical manifestations: - a nearly continuous undulation of the body surface overlying the muscle Special laboratory: - electromyography typically shows continuous motor unit activity ith spontaneous oligo- & multiplet-discharges of high intraburst frequency (myokymic discharges) Notes: - isolated spontaneous muscle twitches occur in many persons & have no grave significance

General

sign/symptom

Database Correlations

OMIM 160120

References

  1. NLM MeSH Browser http://www.nlm.nih.gov/mesh/meshhome.html
  2. Adams et al., Principles of Neurology, 6th ed, p1491