Objective and Subjective Characteristics of Vigilance under Different Narrow-Bandwidth Light Conditions: Do Shorter Wavelengths Have an Alertness-Enhancing Effect?

Šmotek, Michal; Vlček, Přemysl; Saifutdinova, Elizaveta; Kopřivová, Jana

doi:10.1159/000502962

Cited by 19 publications

(10 citation statements)

References 62 publications

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“…28 Interestingly, Smotek and coworkers reported an alerting effect for selected variables after exposure to a shortwavelength (blue) light. 29 Further, increased body temperature and heart rate have also been documented after exposure to shortwavelength light (460 nm). 30 These non-image forming effects are believed to be mediated by intrinsically photosensitive retinal ganglion cells (ipRGCs) with particular sensitivity to blue light spectrum from 460 to 480 nm wavelength.…”

Section: Cognitive-behavioral Therapy For Insomniamentioning

confidence: 99%

“…The wavelengths in the blue part of the spectrum (400‐490 nm) significantly suppress melatonin secretion 28 . Interestingly, Smotek and coworkers reported an alerting effect for selected variables after exposure to a short‐wavelength (blue) light 29 . Further, increased body temperature and heart rate have also been documented after exposure to short‐wavelength light (460 nm) 30 .…”

Section: Non‐pharmacologic Therapiesmentioning

confidence: 99%

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Non‐pharmacologic treatment of insomnia in primary care settings

Hrehová

Mezian

2021

Int J Clinical Practice

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Introduction Prevalence of insomnia is higher in females and increases with higher age. Besides primary insomnia, comorbid sleep disorders are also common, accompanying different conditions. Considering the possible adverse effects of commonly used drugs to promote sleep, a non‐pharmacologic approach should be preferred in most cases. Although generally considered first‐line treatment, the non‐pharmacologic approach is often underestimated by both patients and physicians. Objective To provide primary care physicians an up‐to‐date approach to the non‐pharmacologic treatment of insomnia. Methods PubMed, Web of Science, and Scopus databases were searched for relevant articles about the non‐pharmacologic treatment of insomnia up to December 2020. We restricted our search only to articles written in English. Main message Most patients presenting with sleep disorder symptoms can be effectively managed in the primary care setting. Primary care physicians may use pharmacologic and non‐pharmacologic approaches, while the latter should be generally considered first‐line treatment. A primary care physician may opt to refer the patient to a subspecialist for refractory cases. Conclusions This paper provides an overview of current recommendations and up‐to‐date evidence for the non‐pharmacologic treatment of insomnia. This article emphasizes the importance of cognitive‐behavioral therapy for insomnia, likewise, exercise and relaxation techniques. Complementary and alternative approaches are also covered, eg, light therapy, aromatherapy, music therapy, and herbal medicine.

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Section: Cognitive-behavioral Therapy For Insomniamentioning

confidence: 99%

Section: Non‐pharmacologic Therapiesmentioning

confidence: 99%

Non‐pharmacologic treatment of insomnia in primary care settings

Hrehová

Mezian

2021

Int J Clinical Practice

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“…Baek et al [38] found that blue light (short wavelength) significantly reduced EEG alpha activity but increased work productivity after lunch. Michal et al [39] confirmed that short-wavelength light could enhance cognitive efficiency in task-specific scenarios. Eroglu et al [40] proposed that the types and luminance of visual stimuli can be revealed by changing the activity power of the brain.…”

Section: Introduction 1background and Literature Reviewmentioning

confidence: 96%

Effect of Color Temperature and Illuminance on Psychology, Physiology, and Productivity: An Experimental Study

2022

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In this study, we investigated the impact of the lighting environment on psychological perception, physiology, and productivity and then designed lighting control strategies based on the experimental results. The research was conducted in a smart lighting laboratory, and 67 subjects were tested in different illuminances and correlated color temperatures (CCTs). During the experiment, the physiological data of subjects were continuously recorded, while the psychology and productivity results were evaluated by questionnaires and working tests, respectively. The experimental results found that both illuminance and CCT could significantly influence the feeling of comfort and relaxation of the subjects. Warm CCT and higher illuminance (3000 K–590 lux) made subjects feel more comfortable. Productivity reached its maximum value with illuminance above 500 lux and equivalent melanopic lux (EML) higher than 150. The brain-wave and heart-rate changes did not have a close relationship with either illuminance or CCT, but the heart rate slightly increased in the adjustable lighting mode. Regardless of the initial value setting, the subjects preferred intermediate CCT (4200 K) and bright illumination (500 lux) after self-adjustment. Finally, we proposed three comprehensive lighting control strategies based on psychology, productivity, circadian rhythm, and energy-saving.

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“…Šmotek et al [61] compared the alerting effects of 455 nm, 508 nm and 629 nm at identical irradiance (14 µW/cm²) but different illuminance (Table 3) against dim light. The investigation took place in the afternoon and lasted 20 minutes.…”

Section: First Authormentioning

confidence: 99%

Alerting Effect of Light: A Review of Daytime Studies

Alwalidi

Hoffmann

2022

Journal of Daylighting

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Light affects humans beyond only image formation. Several studies have reported that light can increase daytime alertness and can therefore be positively utilized to counter daytime fatigue and increase productivity in workspaces. This systematic review summarized and analysed relevant literature that investigated the daytime alerting effect of light. Using keywords “alertness” and “light” in the title we retrieved a total of 142 studies via three search engines. Out of 142 studies, only 26 investigated the alerting effect of light during daytime. Six studies were excluded from the review based on the exclusion criteria. We reviewed twenty articles from the year 1991 until 2022 that have investigated the alerting effect of polychromatic and monochromatic light sources. Only seven out of twenty studies found an alerting effect that was recorded through positive self-assessment or enhancement of cognitive processes. The studies in which the lighting application would be transferrable for office use were highlighted. A specific common trend regarding the enhancement of alertness was not detected, as different lighting conditions and protocols were applied in the reviewed studies. More studies that investigate the effect of polychromatic light with intensities and spectral compositions that are suitable for application in realistic working environments are necessary to determine whether the daytime alerting effect of light will be significant.

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Objective and Subjective Characteristics of Vigilance under Different Narrow-Bandwidth Light Conditions: Do Shorter Wavelengths Have an Alertness-Enhancing Effect?

Cited by 19 publications

References 62 publications

Non‐pharmacologic treatment of insomnia in primary care settings

Non‐pharmacologic treatment of insomnia in primary care settings

Effect of Color Temperature and Illuminance on Psychology, Physiology, and Productivity: An Experimental Study

Alerting Effect of Light: A Review of Daytime Studies

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