| Myoclonic Jerk; Myoclonic Jerking; Myoclonus Simplex; Myoclonus, Eyelid; Myoclonus, Intention; Myoclonus, Lower Extremity; Myoclonus, Oculopalatal; Myoclonus, Segmental; Myoclonus, Sleep; Myoclonus, Upper Extremity; Action Myoclonus |
| 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). |
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