title: Periodic limb movements and sleep-wake disorder.
abstract: The relationship of periodic limb movements (PLM) and sleep-wake disorders in 11 patients was investigated. Two patients complained of insomnia. A patient with cervical spinal canal stenosis had a complaint of difficulty in initiating sleep. Movement index (MI) was 51 and PLM arousal index was 8. A patient with chronic hemodialysis had a complaint of difficulty in initiating and maintaining sleep. MI was 79 and PLM arousal index was 51. One patient with myotonic dystrophy showed 79 in MI and 3 in PLM arousal index. It is suspected that myotonic dystrophy is less sensitive to stimuli during sleep (i.e. PLM). These results suggest that the sleep-wake disorders associated with PLM relate to the threshold of awakening.
authors.affiliation: Department of Neurology, Showa University School of Medicine, Tokyo, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Nozawa
authors.forename: H
authors.initials: H
authors.lastname: Ichikawa
authors.forename: T
authors.initials: T
authors.lastname: Takeuchi
mesh_terms: D000328:Adult; D001143:Arousal; D002940:Circadian Rhythm; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017286:Polysomnography; D012148:Restless Legs Syndrome / Q000175:diagnosis* / Q000209:etiology; D012893:Sleep Wake Disorders / Q000175:diagnosis* / Q000209:etiology; D014851:Wakefulness