Propriospinal myoclonus at sleep onset

Definition

Propriospinal myoclonus at sleep onset consists of sudden myoclonic jerks of the trunk, hips, and knees in a fixed pattern that occur during the transition from wakefulness to sleep and, more rarely, during nighttime awakenings or upon awakening in the morning. The jerks arise mainly in spinally innervated muscles and thereafter propagate to rostral and caudal muscles at a low speed, typical of propriospinal pathways. The movements result in clinically significant difficulty with sleep initiation or maintenance.

Also indexed as

Nearby in Sleep-related movement disorders

• 7A80Restless legs syndrome
• 7A81Periodic limb movement disorder
• 7A82Sleep-related leg cramps
• 7A83Sleep-related bruxism
• 7A84Sleep-related rhythmic movement disorder
• 7A85Benign sleep myoclonus of infancy
• 7A87Sleep-related movement disorder due to a medical condition
• 7A88Sleep-related movement disorder due to a medication or substance