Effects of bright light exposure on heart rate variability during sleep in young women

To investigate the effects of evening bright light on the autonomic nervous system, heart rate variability (HRV) during sleep was analyzed in dim light (DL) and bright light (BL) conditions. We recorded polysomnography in nine healthy young women aged 20–21 years. Time series of % delta power was ca...

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Bibliographic Details
Published in:Psychiatry and clinical neurosciences 2001-06, Vol.55 (3), p.283-284
Main Authors: Kohsaka, Masako, Kohsaka, Shinobu, Fukuda, Noriko, Honma, Hiroshi, Sakakibara, Satoshi, Kawai, Ikuko, Miyamoto, Tamaki, Kobayashi, Riko
Format: Article
Language:English
Subjects:
Adult
autonomic nervous system
Autonomic Nervous System - physiology
Circadian Rhythm - physiology
evening bright light
Female
Heart Rate - physiology
heart rate variability
Humans
Light
Polysomnography
Sleep - physiology
Sleep Stages - physiology
slow wave sleep
women
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Summary:To investigate the effects of evening bright light on the autonomic nervous system, heart rate variability (HRV) during sleep was analyzed in dim light (DL) and bright light (BL) conditions. We recorded polysomnography in nine healthy young women aged 20–21 years. Time series of % delta power was calculated in the 0.49–2.20 Hz band. Heart rate variability was analyzed from a 10‐min segment of slow wave sleep. The low‐ to high‐frequency ratio and the low‐frequency component decreased significantly in the BL conditions compared with the DL conditions. However, the power of the high‐frequency component did not change in the two conditions. These results indicate that evening BL affects the autonomic nervous system during slow wave sleep.
ISSN:1323-1316
1440-1819
DOI:10.1046/j.1440-1819.2001.00861.x