Periodic limb movements and sleep-wake disorder |
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Authors: | TANEYOSHI NOZAWA MD HIROO ICHIKAWA MD TORU TAKEUCHI MD |
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Affiliation: | Department of Neurology, Showa University School of Medicine, Tokyo, Japan |
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Abstract: | 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. |
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Keywords: | arousal threshold daytime sleepiness insomnia myotonic dystrophy periodic limb movement |
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