Canadian Medical Guide > Diseases > Nervous System Diseases > Neurologic Manifestations > Dyskinesias > Myoclonus Terms and Definitions

Myoclonus

Medical Definition:	Involuntary shock-like contractions, irregular in rhythm and amplitude, followed by relaxation, of a muscle or a group of muscles. This condition may be a feature of some CENTRAL NERVOUS SYSTEMS DISEASES (e.g., EPILEPSY, MYOCLONIC). Nocturnal myoclonus may represent a normal physiologic event or occur as the principal feature of the NOCTURNAL MYOCLONUS SYNDROME. (From Adams et al., Principles of Neurology, 6th ed, pp102-3).
Guide Notes:	for "myoclonic seizure" consider MYOCLONUS or EPILEPSY, MYOCLONIC or SPASMS, INFANTILE; NOCTURNAL MYOCLONUS SYNDROME is also available
Also Called:	Myoclonus Simplex,Myoclonus, Action,Myoclonus, Eyelid,Myoclonus, Intention,Myoclonus, Lower Extremity,Myoclonus, Nocturnal,Myoclonus, Oculopalatal,Myoclonus, Palatal,Myoclonus, Segmental,Myoclonus, Upper Extremity,Polymyoclonus

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