Influence of the modern light environment on mood

@article{Bedrosian2013InfluenceOT,
  title={Influence of the modern light environment on mood},
  author={Tracy A. Bedrosian and Randy J Nelson},
  journal={Molecular Psychiatry},
  year={2013},
  volume={18},
  pages={751-757}
}
Humans and other organisms have adapted to a consistent and predictable 24-h solar cycle, but over the past ∼130 years the widespread adoption of electric light has transformed our environment. Instead of aligning behavioral and physiological processes to the natural solar cycle, individuals respond to artificial light cycles created by social and work schedules. Urban light pollution, night shift work, transmeridian travel, televisions and computers have dramatically altered the timing of… Expand

Paper Mentions

Interventional Clinical Trial
The purpose of this pilot study is to evaluate wether a naturalistic indoor light environment can improve sleep and mood in psychiatric inpatients  
ConditionsMental Illness
InterventionOther
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References

SHOWING 1-10 OF 79 REFERENCES
The dark side of light at night: physiological, epidemiological, and ecological consequences
TLDR
This review addresses the complicated web of potential behavioral and physiological consequences resulting from exposure to light at night, as well as the large‐scale medical and ecological implications that may result. Expand
Dim Nighttime Light Impairs Cognition and Provokes Depressive-Like Responses in a Diurnal Rodent
TLDR
Investigation of the effect of nighttime light on behavior and the brain of a diurnal rodent, the Nile grass rat, suggests that exposure to dLAN can alter affective responses and impair cognition in adiurnal animal. Expand
Aberrant light directly impairs mood and learning through melanopsin-expressing neurons
TLDR
It is shown, using an aberrant light cycle that neither changes the amount and architecture of sleep nor causes changes in the circadian timing system, that light directly regulates mood-related behaviours and cognitive functions in mice. Expand
Light at Night Alters Daily Patterns of Cortisol and Clock Proteins in Female Siberian Hamsters
TLDR
Although locomotor activity remained entrained to the light cycle, the diurnal fluctuation of cortisol concentrations was blunted and the expression patterns of clock proteins in the suprachiasmatic nucleus and hippocampus were altered, demonstrating that chronic exposure to dim LAN can dramatically affect fundamental cellular function and emergent physiology. Expand
Exposure to bright light and darkness to treat physiologic maladaptation to night work.
TLDR
It is concluded that maladaptation of the human circadian system to night work, with its associated decline in alertness, performance, and quality of daytime sleep, can be treated effectively with scheduled exposure to bright light at night and darkness during the day. Expand
Photic Regulation of Melatonin in Humans: Ocular and Neural Signal Transduction
TLDR
Acute, light-induced suppression of melatonin is proving to be a powerful tool for clarifying how elements of ocular and neural physiology influence the interaction between light and the secretion ofmelatonin from the human pineal gland. Expand
Effects of bright light treatment on depression- and anxiety-like behaviors of diurnal rodents maintained on a short daylight schedule
TLDR
Predictive validity is evaluated by testing the effects of bright light treatment in Sand rats exposed to chronic SD to support the possibility that the diurnal Sand rat might be a preferred model animal for the study of SAD. Expand
Dim light at night provokes depression-like behaviors and reduces CA1 dendritic spine density in female hamsters
TLDR
It is demonstrated dim light at night is sufficient to reduce synaptic spine connections to CA1, and night-time low level illumination, comparable to levels that are pervasive in North America and Europe, may contribute to the increasing prevalence of mood disorders. Expand
Influence of light at night on murine anxiety- and depressive-like responses
TLDR
Evidence is provided that exposure to unnatural lighting can induce significant changes in affect, increasing depressive-like and decreasing anxiety-like responses and that glucocorticoid concentrations were reduced suggesting that the affective behavioural responses to LL are not the result of elevated corticosterone. Expand
Action Spectrum for Melatonin Regulation in Humans: Evidence for a Novel Circadian Photoreceptor
TLDR
The results suggest that, in humans, a single photopigment may be primarily responsible for melatonin suppression, and its peak absorbance appears to be distinct from that of rod and cone cellphotopigments for vision. Expand
...
1
2
3
4
5
...