The Effects of Red and Blue Lights on Circadian Variations in Cortisol, Alpha Amylase, and Melatonin

International Journal of Endocrinology, Journal Year: 2010, Volume and Issue: 2010, P. 1 - 9

Published: Jan. 1, 2010

The primary purpose of the present study was to expand our understanding impact light exposures on endocrine and autonomic systems as measured by acute cortisol, alpha amylase, melatonin responses. We utilized from narrowband long-wavelength (red) narrow-band short-wavelength (blue) lights more precisely understand role suprachiasmatic nuclei (SCN) in these In a within-subjects experimental design, twelve subjects periodically received one-hour corneal 40 lux blue or red while continuously awake for 27 hours. Results showed-that, expected, only reduced nocturnal melatonin. contrast, both affected cortisol levels and, although less clear, amylase well. data bring into question whether nonvisual pathway mediating suppression is same that other responses exhibited nervous systems.

Language: Английский

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Non-visual effects of light: How to use light to promote circadian entrainment and elicit alertness

Lighting Research & Technology, Journal Year: 2017, Volume and Issue: 50(1), P. 38 - 62

Published: July 25, 2017

In addition to stimulating the visual system, light incident on retina stimulates other biological functions, also referred as non-visual responses. Among most notable functions are human circadian rhythms, which bodily rhythms that, in constant darkness, oscillate with a period close to, but typically slightly longer than 24 hours. Twenty-four-hour light-dark patterns major synchronizer of local time Earth. Entrainment has been implicated health and well-being. Light can elicit an acute alerting effect people, similar "cup coffee." This review summarizes literature how affects entrainment alertness it be used achieve these aims.

Language: Английский

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Direct Effects of Light on Alertness, Vigilance, and the Waking Electroencephalogram in Humans Depend on Prior Light History

SLEEP, Journal Year: 2013, Volume and Issue: 36(8), P. 1239 - 1246

Published: July 31, 2013

Light can induce an acute alerting response in humans; however, it is unknown whether the magnitude of this simply a function absolute illuminance light itself, or depends on history preceding stimulus. Here, we compared effects to subsequent

Language: Английский

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Light Pollution as a New Risk Factor for Human Breast and Prostate Cancers

Springer eBooks, Journal Year: 2013, Volume and Issue: unknown

Published: Jan. 1, 2013

Language: Английский

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Daytime light exposure: Effects on biomarkers, measures of alertness, and performance

Behavioural Brain Research, Journal Year: 2014, Volume and Issue: 274, P. 176 - 185

Published: Aug. 15, 2014

Language: Английский

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