| Position Change During Sleep Period in Patients with Multiple System Atrophy |
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남현우, 홍윤호, 권형민, 조진환 |
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| Position Change During Sleep Period in Patients with Multiple System Atrophy |
| Hyunwoo Nam, Yoon-Ho Hong, Hyung-Min Kwon, Jinwhan Cho |
| Department of Neurology, Boramae Hospital, Seoul National University College of Medicine |
| Corresponding Author:
Jinwhan Cho ,Tel: +82-2-840-2507, Fax: +82-2-831-2826, Email: praisecho@hanmail.net |
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Received: December 8, 2007 Accepted: December 23, 2007 Published online: December 31, 2007 |
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| ABSTRACT |
Background and Purpose: We wanted to investigate whether patients with multiple system atrophy (MSA) change their positions less
frequently compared to the controls during sleep and during the sleep period time.
Methods: Fifteen MSA patients and fifteen controls were compared. They were matched in sex, age, apnea-hypopnea index (AHI),
and PLMI (periodic limb movements index during sleep). Technician-attended standard polysomnography was performed. Position changes
were divided into 3 categories depending on the interval between the arousal and the start of the position change. Category 1 was the
position changes that initiated within 3 seconds after arousal. Category 2 was the position changes that occurred between 3 and 10
seconds of arousal and category 3 was the position change after 10 seconds of arousal.
Results: As a whole, position changes are less frequent in the MSA group. Category 1 position change is decreased in stages 1 and
REM in MSA group compared to the control group. The frequency of category 2 position change is also dramatically lower in the
MSA group as a whole and especially with prior stages 1 and 2. Category 3 position change shows marked difference between the
two groups when they are compared as position change per hour of WASO.
Conclusions: Our study shows less frequent position changes during sleep in MSA patients. Longer period of wakefulness during
night seems to be a compensatory mechanism for the position change. |
| Keywords:
Multiple system atrophy | Position change | Sleep | Polysomnography |
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