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 SYSTEM DISEASES; (e.g., EPILEPSY, MYOCLONIC). Nocturnal myoclonus is the principal feature of the NOCTURNAL MYOCLONUS SYNDROME. (From Adams et al., Principles of Neurology, 6th ed, pp102-3).

Annotation

for "myoclonic seizure" consider MYOCLONUS or EPILEPSY, MYOCLONIC or SPASMS, INFANTILE; note other myoclonus terms are also available

DUI

D009207 MeSH Browser

CUI

M0014345

History note

1963; for MYOCLONIC JERKING use EPILEPSY, MYOCLONIC 1992-1999; for MYOCLONIC JERKING, MASSIVE use SPASMS, INFANTILE 1977-1999

Public note

1963; for MYOCLONIC JERKING see EPILEPSY, MYOCLONIC 1992-1999; for MYOCLONIC JERKING, MASSIVE see SPASMS, INFANTILE 1977-1999