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Autonomic nervous function after evening bright light therapy: Spectral analysis of heart rate variability
Author(s) -
Sakakibara Satoshi,
Honma Hiroshi,
Kohsaka Masako,
Fukuda Noriko,
Kawai Ikuko,
Kobayashi Riko,
Koyama Tsukasa
Publication year - 2000
Publication title -
psychiatry and clinical neurosciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.609
H-Index - 74
eISSN - 1440-1819
pISSN - 1323-1316
DOI - 10.1046/j.1440-1819.2000.00716.x
Subject(s) - evening , autonomic nervous system , spectral analysis , heart rate variability , analysis of variance , cardiology , sympathetic nervous system , medicine , heart rate , physics , blood pressure , quantum mechanics , astronomy , spectroscopy
In order to investigate the effects of 5000 lx evening bright light on autonomic nervous function, a spectral analysis was used to assess heart rate variability in consecutive 5‐min epochs just after 60 min of bright light therapy was given to 12 young women (range: 20–21 years of age). The study revealed that a low frequency band (LF) increased in bright light conditions (BL) in comparison with controlled conditions (CL). High frequency band (HF), LF : HF ratio and the coefficient of variance (CV R‐R) were not significantly different between the two conditions. These results indicate that 5000 lx evening bright light may affect sympathetic nervous system activity in healthy women.