Effects of light on human circadian rhythms, sleep and mood

Somnologie - Schlafforschung und Schlafmedizin, Journal Year: 2019, Volume and Issue: 23(3), P. 147 - 156

Published: Aug. 20, 2019

Humans live in a 24-hour environment, which light and darkness follow diurnal pattern. Our circadian pacemaker, the suprachiasmatic nuclei (SCN) hypothalamus, is entrained to solar day via pathway from retina synchronises our internal biological rhythms. Rhythmic variations ambient illumination impact behaviours such as rest during sleep activity wakefulness well their underlying processes. Rather recently, availability of artificial has substantially changed especially evening night hours. This may increase risk developing rhythm sleep-wake disorders (CRSWD), are often caused by misalignment endogenous rhythms external light-dark cycles. While exact relationship between CRSWD remains be established, nocturnal been shown alter humans. On other hand, can also used an effective noninvasive therapeutic option with little no side effects, improve sleep,mood general well-being. article reviews current state knowledge regarding effects on rhythms, sleep, mood.

Language: Английский

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Health consequences of electric lighting practices in the modern world: A report on the National Toxicology Program's workshop on shift work at night, artificial light at night, and circadian disruption

The Science of The Total Environment, Journal Year: 2017, Volume and Issue: 607-608, P. 1073 - 1084

Published: July 27, 2017

Language: Английский

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Why artificial light at night should be a focus for global change research in the 21st century

Global Change Biology, Journal Year: 2017, Volume and Issue: 24(3), P. 872 - 882

Published: Nov. 10, 2017

The environmental impacts of artificial light at night have been a rapidly growing field global change science in recent years. Yet, pollution has not achieved parity with other phenomena the level concern and interest it receives from scientific community, government nongovernmental organizations. This is despite globally widespread, expanding changing nature night-time lighting immediacy, severity phylogenetic breath its impacts. In this opinion piece, we evidence 10 reasons why should be focus for research 21st century. Our extend beyond those concerned principally environment, to also include on human health, culture biodiversity conservation more generally. We conclude that use will continue raise numerous ecological, health cultural issues, but opportunities exist mitigate by combining novel technologies sound evidence. potential gains appropriate management far indeed may play key role transitioning towards sustainable society.

Language: Английский

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Circadian rhythms and exercise — re-setting the clock in metabolic disease

Nature Reviews Endocrinology, Journal Year: 2019, Volume and Issue: 15(4), P. 197 - 206

Published: Jan. 17, 2019

Language: Английский

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Circadian Rhythms Disrupted by Light at Night and Mistimed Food Intake Alter Hormonal Rhythms and Metabolism

International Journal of Molecular Sciences, Journal Year: 2023, Volume and Issue: 24(4), P. 3392 - 3392

Published: Feb. 8, 2023

Availability of artificial light and light-emitting devices have altered human temporal life, allowing 24-hour healthcare, commerce production, expanding social life around the clock. However, physiology behavior that evolved in context 24 h solar days are frequently perturbed by exposure to at night. This is particularly salient circadian rhythms, result endogenous biological clocks with a rhythm ~24 h. Circadian rhythms govern features behavior, set precisely primarily during day, though other factors, such as timing meals, can also affect rhythms. significantly affected night shift work because nocturnal light, electronic devices, shifts meals. Night workers increased risk for metabolic disorder, well several types cancer. Others who exposed or late mealtimes show disrupted cardiac disorders. It imperative understand how alter function develop strategies mitigate their negative effects. In this review, we provide an introduction physiological regulation homeostasis suprachiasmatic nucleus (SCN), SCN-mediated hormones display including melatonin glucocorticoids. Next, discuss circadian-gated processes sleep food intake, followed modern lighting disrupts molecular clock Lastly, identify disruptions metabolism increase susceptibility syndrome cardiovascular diseases, various harmful consequences associated on health.

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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Human-centric lighting: Myth, magic or metaphor?

Lighting Research & Technology, Journal Year: 2020, Volume and Issue: 53(2), P. 97 - 118

Published: Oct. 6, 2020

This paper discusses the rise of human-centric lighting and its current status in lighting. We summarise human benefits associated with light show that has sound motivations, despite being tainted by misleading marketing claims. The phrase integrative avoids hype encapsulates what aspires to be. Embodied these concepts are some things old new. is twofold. First, without diminishing value products, core ingredient for good outcomes design, driven a design team. Second, still vision, visibility, visual comfort amenity as important ever. Complementing new awareness responsibility how influence non-visual responses humans. Circadian, neuroendocrine neurobehavioural health should be considered on-par responses. leads toward solutions increased contrast between day night. parties responsible addressing evolving. Architects, professionals, equipment manufacturers, medical building owners individuals all have stake, but who drive decisions proportion?

Language: Английский

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Circadian-effective light and its impact on alertness in office workers

Lighting Research & Technology, Journal Year: 2018, Volume and Issue: 51(2), P. 171 - 183

Published: Jan. 9, 2018

A field study was conducted at two U.S. federal government office sites and embassies to demonstrate whether circadian-effective lighting (providing circadian stimulus (CS) values of CS ≥ 0.3) could be installed in buildings, determine this intervention would reduce sleepiness increase alertness, vitality energy workers while work. Desktop and/or overhead luminaires provided participants’ eyes during a two-day intervention. pendant-mounted Daysimeter device used measure participant-specific the baseline days. Participants also completed questionnaires inquiring about sleep habits, stress subjective feelings energy. The data showed that participants were exposed significantly higher amounts light work days compared day. Self-reported scores reduced As hypothesised, reported feeling more vital, energetic alert on present results from four independent environments systems delivering 0.3 can alertness workers.

Language: Английский

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Effect of daylight LED on visual comfort, melatonin, mood, waking performance and sleep

Lighting Research & Technology, Journal Year: 2019, Volume and Issue: 51(7), P. 1044 - 1062

Published: March 24, 2019

LED *Shared senior authors. light sources have a discontinuous spectrum with prominent ‘blue’ peak between 450 and 470 nm that influences non-image forming responses in humans. We tested an lighting solution mimicking daylight on visual comfort, circadian physiology, daytime alertness, mood, cognitive performance sleep. Fifteen young males twice spent 49 hours the laboratory under conventional-LED daylight-LED condition balanced cross over design flanked by baseline post-light exposure night. Despite different spectra, photopic lux correlated colour temperature of were same for both LEDs. The rendering index melanopic strength 25.3% 21%, respectively, higher than conventional LED. volunteers had better felt more alert happier morning evening LED, while diurnal melatonin profile, psychomotor vigilance working memory not significantly different. Delta EEG activity (0.75–4.5 Hz) was after during evidence has beneficial effects mood sleep intensity healthy volunteers.

Language: Английский

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Human-Centric Lighting: Foundational Considerations and a Five-Step Design Process

Frontiers in Neurology, Journal Year: 2021, Volume and Issue: 12

Published: Jan. 27, 2021

At its best, human-centric lighting considers the visual and non-visual effects of light in support positive human outcomes. worst, it is a marketing phrase used to healthwash products or design solutions. There no doubt that environmental contributes health, but how might one practice given both credible potential implausible hype? Marketing literature filled with promises. Technical societies have summarized science not yet offered guidance. Meanwhile, designers are middle, attempting distinguish knowledge from which dubious make decisions affect people directly. This article intended to: (1) empower reader fundamental understandings ways affects health; (2) provide process for can dovetail decision-making already part designer's workflow.

Language: Английский

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