Effects of day-time exposure to different light intensities on light-induced melatonin suppression at night
نویسندگان
چکیده
منابع مشابه
The influence of light at night exposure on melatonin levels among Canadian rotating shift nurses.
BACKGROUND Shift work has been identified as a risk factor for several cancer sites in recent years, with melatonin as a potential intermediate on the proposed causal pathway. This study examined the influence of nighttime light exposure on melatonin levels among 123 rotating shift nurses. METHODS Nurses working a rotating shift schedule (two 12-hour days, two 12-hour nights, and five days of...
متن کاملEffectiveness of a red-visor cap for preventing light-induced melatonin suppression during simulated night work.
Bright light at night improves the alertness of night workers. Melatonin suppression induced by light at night is, however, reported to be a possible risk factor for breast cancer. Short-wavelength light has a strong impact on melatonin suppression. A red-visor cap can cut the short-wavelength light from the upper visual field selectively with no adverse effects on visibility. The purpose of th...
متن کاملEffects of bright light and melatonin on sleep propensity, temperature, and cardiac activity at night.
Melatonin increases sleepiness, decreases core temperature, and increases peripheral temperature in humans. Melatonin may produce these effects by activating peripheral receptors or altering autonomic activity. The latter hypothesis was investigated in 16 supine subjects. Three conditions were created by using bright light and exogenous melatonin: normal endogenous, suppressed, and pharmacologi...
متن کاملThe effects of sleep and light at night on melatonin in adolescents.
OBJECTIVE The circadian hormone melatonin has wide-reaching effects on human physiology. In adolescents, the impact of nighttime light exposure and other modifiable behavioral factors on melatonin levels is poorly understood. DESIGN We cross-sectionally examined the influence of nighttime behaviors on melatonin levels in 100 adolescents (average age: 15.7; 55 female, 45 male), who completed a...
متن کاملDo Wild Great Tits Avoid Exposure to Light at Night?
Studies of wild populations have provided important insights into the effects of artificial light at night on organisms, populations and ecosystems. However, in most studies the exact amount of light at night individuals are exposed to remains unknown. Individuals can potentially control their nighttime light exposure by seeking dark spots within illuminated areas. This uncertainty makes it dif...
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ژورنال
عنوان ژورنال: Journal of Physiological Anthropology
سال: 2015
ISSN: 1880-6805
DOI: 10.1186/s40101-015-0067-1