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).
Also Known As:
Nocturnal Myoclonus; Myoclonic Jerk; Myoclonus, Sleep; Myoclonic Jerking; Myoclonus Simplex; Myoclonus, Eyelid; Myoclonus, Intention; Myoclonus, Lower Extremity; Myoclonus, Oculopalatal; Myoclonus, Segmental; Myoclonus, Upper Extremity; Action Myoclonus; Extremity Myoclonus, Lower; Extremity Myoclonus, Upper; Eyelid Myoclonus; Intention Myoclonus; Jerk, Myoclonic; Jerking, Myoclonic; Jerks, Myoclonic; Lower Extremity Myoclonus; Myoclonic Jerks; Oculopalatal Myoclonus; Palatal Myoclonus; Segmental Myoclonus; Simplex, Myoclonus; Sleep Myoclonus; Upper Extremity Myoclonus; Myoclonus, Action; Myoclonus, Nocturnal; Myoclonus, Palatal; Polymyoclonus