1996 Fiscal Year Final Research Report Summary
Effects of Body Posture during Daytime on the Sleep at Night
| Project/Area Number |
06640921
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
人類学(含生理人類学)
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| Research Institution | Kyushu Institute of Design (1995-1996)
Osaka City University (1994) |
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Principal Investigator |
WATANUKI Shigeki Kyushu Institute of Design Faculty of Design Associate Professor, 芸術工学部, 助教授 (00158677)
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| Project Period (FY) |
1994 – 1996
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| Keywords | posture / sleep / autonomic nervous activity / skin temperature / electroencephalogram / heart rate variability |
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| Research Abstract |
To investigate the effect of the difference of autonomic nervous activity by body posture change, i.e.head up tilting and supine position, on the quality of the sleep evaluated by electroencephalogram, seven male subjects slept in the climatic chamber from 11 p.m.to 8 a.m.after six hours rest in each posture at daytime. Sympathetic activity evaluated by spectral analysis of heart rate variability in head up tilting was higher than in supine position at daytime. The sleep efficiency calculated by some measurements (time in bed, sleep latency, SWS latency etc.) in supine was higher than in head up tilting position. It suggests that passive strain during daytime might decrease the quality of sleep.
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