Advanced

The influence of light on circarhythms in humans

Küller, Rikard LU (2002) In Journal of Physiological Anthropology Applied Human Science1999-01-01+01:002005-01-01+01:00 21(2). p.87-91
Abstract
The present review discusses two types of biological rhythms, namely, circadian rhythms and circannual rhythms. Humans possess a circadian rhythm of approximately 24 hours, which is regulated by neural and hormonal processes. The synchronisation of this rhythm with the solar day and night is maintained through entrainment mainly by light. Dark environments completely lacking windows may have a negative effect on well-being and work capacity. During shift work the biological clock tends to maintain its normal 'diurnal' rhythm, which may lead to extreme tiredness and increased risk of accidents. Negative effects such as these may be partially alleviated by means of bright light during the night. During air travel across several time zones... (More)
The present review discusses two types of biological rhythms, namely, circadian rhythms and circannual rhythms. Humans possess a circadian rhythm of approximately 24 hours, which is regulated by neural and hormonal processes. The synchronisation of this rhythm with the solar day and night is maintained through entrainment mainly by light. Dark environments completely lacking windows may have a negative effect on well-being and work capacity. During shift work the biological clock tends to maintain its normal 'diurnal' rhythm, which may lead to extreme tiredness and increased risk of accidents. Negative effects such as these may be partially alleviated by means of bright light during the night. During air travel across several time zones there is little time for the biological clock to adjust, but the resulting 'jet lag' may possibly be overcome by means of appropriately timed exposure to bright light. In countries situated far from the equator, the biological clock may become seriously disrupted during the short days of the dark season. Characterised by fatigue, sadness and sleep problems, these seasonal affective disorders may be cured or alleviated by means of regular periods outdoors, better lighting indoors, or, in the most serious cases, light therapy. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Fatigue, Circadian Rhythm, Human, Mood Disorders : etiology, Light, Phototherapy, Sleep Disorders : etiology
in
Journal of Physiological Anthropology Applied Human Science1999-01-01+01:002005-01-01+01:00
volume
21
issue
2
pages
87 - 91
publisher
BioMed Central
ISSN
1345-3475
DOI
10.2114/jpa.21.87
language
English
LU publication?
yes
id
1044c16f-4cce-482d-b5d7-39fd412a4b78 (old id 108713)
alternative location
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12056181&dopt=Abstract
date added to LUP
2007-07-02 14:25:26
date last changed
2016-10-28 12:11:28
@misc{1044c16f-4cce-482d-b5d7-39fd412a4b78,
  abstract     = {The present review discusses two types of biological rhythms, namely, circadian rhythms and circannual rhythms. Humans possess a circadian rhythm of approximately 24 hours, which is regulated by neural and hormonal processes. The synchronisation of this rhythm with the solar day and night is maintained through entrainment mainly by light. Dark environments completely lacking windows may have a negative effect on well-being and work capacity. During shift work the biological clock tends to maintain its normal 'diurnal' rhythm, which may lead to extreme tiredness and increased risk of accidents. Negative effects such as these may be partially alleviated by means of bright light during the night. During air travel across several time zones there is little time for the biological clock to adjust, but the resulting 'jet lag' may possibly be overcome by means of appropriately timed exposure to bright light. In countries situated far from the equator, the biological clock may become seriously disrupted during the short days of the dark season. Characterised by fatigue, sadness and sleep problems, these seasonal affective disorders may be cured or alleviated by means of regular periods outdoors, better lighting indoors, or, in the most serious cases, light therapy.},
  author       = {Küller, Rikard},
  issn         = {1345-3475},
  keyword      = {Fatigue,Circadian Rhythm,Human,Mood Disorders : etiology,Light,Phototherapy,Sleep Disorders : etiology},
  language     = {eng},
  number       = {2},
  pages        = {87--91},
  publisher    = {ARRAY(0xb7966f8)},
  series       = {Journal of Physiological Anthropology Applied Human Science1999-01-01+01:002005-01-01+01:00},
  title        = {The influence of light on circarhythms in humans},
  url          = {http://dx.doi.org/10.2114/jpa.21.87},
  volume       = {21},
  year         = {2002},
}