Effectiveness of evening phototherapy for insomnia is reduced by bright daytime light exposure
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چکیده
منابع مشابه
Effect of evening exposure to bright or dim light after daytime bright light on absorption of dietary carbohydrates the following morning.
We had previously reported on the effect of exposure to light on the human digestive system: daytime bright light exposure has a positive effect, whereas, evening bright light exposure has a negative effect on the efficiency of dietary carbohydrate absorption from the evening meal. These results prompted us to examine whether the light intensity to which subjects are exposed in the evening affe...
متن کاملExposure to bright light during evening class hours increases alertness among working college students.
OBJECTIVE To evaluate the effects of exposure to bright light on sleepiness during evening hours among college students. METHODS Twenty-seven healthy college students, all males, with ages ranging from 21 to 24years, working during the day and studying in the evening, participated in this study. During the 3week study, the students wore actigraphs and recorded levels of sleepiness. In a cross...
متن کاملTime-of-day-dependent effects of bright light exposure on human psychophysiology: comparison of daytime and nighttime exposure.
Bright light can influence human psychophysiology instantaneously by inducing endocrine (suppression of melatonin, increasing cortisol levels), other physiological changes (enhancement of core body temperature), and psychological changes (reduction of sleepiness, increase of alertness). Its broad range of action is reflected in the wide field of applications, ranging from optimizing a work envi...
متن کاملDaytime Light Exposure Dynamically Enhances Brain Responses
In humans, light enhances both alertness and performance during nighttime and daytime [1-4] and influences regional brain function [5]. These effects do not correspond to classical visual responses but involve a non-image forming (NIF) system, which elicits greater endocrine, physiological, neurophysiological, and behavioral responses to shorter light wavelengths than to wavelengths geared towa...
متن کاملEvening melatonin and bright light administration induce additive phase shifts in dim light melatonin onset.
In healthy young men, administration of a single light pulse (5000 lux for 3 hr) or a single melatonin pill (5 mg) at 20:40 hr under controlled constant routine conditions of <10 lux, yielded a phase delay and a phase advance, respectively, in the circadian marker of dim light melatonin onset 24 hr later. Phase shifts after combining the two interventions were additive. Melatonin suppression is...
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ژورنال
عنوان ژورنال: Sleep Medicine
سال: 2011
ISSN: 1389-9457
DOI: 10.1016/j.sleep.2011.02.005