Blue light improves cognitive performance

Lehrl, S; Gerstmeyer, Kristian; Jacob, Jürgen Harald; Frieling, Helge; Henkel, Andreas; Meyrer, Robert; Wiltfang, Jens; Kornhuber, Johannes; Bleich, Stefan

doi:10.1007/s00702-006-0621-4

Cited by 102 publications

(72 citation statements)

References 12 publications

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“…21 Recent functional magnetic resonance imaging (fMRI) studies confirm these results showing that very short duration (50 sec) 470-nm blue light exposure induces greater neural activation as compared to 555-nm green light exposure. 8 Similarly, a 2-h daytime (evening) exposure to monochromatic blue light (456 nm) induced greater subjective alertness and reduced sleepiness as compared to intensitymatched 548-nm exposure, although this difference did not reach statistical significance.…”

Section: Diurnal Spectral Sensitivity Of the Acute Alerting Effects Osupporting

confidence: 63%

Diurnal Spectral Sensitivity of the Acute Alerting Effects of Light

Rahman

Flynn‐Evans

Aeschbach

et al. 2014

Sleep

166

168

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Study Objectives:Previous studies have demonstrated short-wavelength sensitivity for the acute alerting response to nocturnal light exposure. We assessed daytime spectral sensitivity in alertness, performance, and waking electroencephalogram (EEG). Design: Between-subjects (n = 8 per group). Setting: Inpatient intensive physiologic monitoring unit. Participants: Sixteen healthy young adults (mean age ± standard deviation = 23.8 ± 2.7 y). Interventions: Equal photon density exposure (2.8 × 10 13 photons/cm 2 /s) to monochromatic 460 nm (blue) or 555 nm (green) light for 6.5 h centered in the middle of the 16-h episode of wakefulness during the biological day. Results were compared retrospectively to 16 individuals who were administered the same light exposure during the night. Measurements and Results: Daytime and nighttime 460-nm light exposure significantly improved auditory reaction time (P < 0.01 and P < 0.05, respectively) and reduced attentional lapses (P < 0.05), and improved EEG correlates of alertness compared to 555-nm exposure. Whereas subjective sleepiness ratings did not differ between the two spectral conditions during the daytime (P > 0.05), 460-nm light exposure at night significantly reduced subjective sleepiness compared to 555-nm light exposure at night (P < 0.05). Moreover, nighttime 460-nm exposure improved alertness to near-daytime levels. Conclusions:The alerting effects of short-wavelength 460-nm light are mediated by counteracting both the circadian drive for sleepiness and homeostatic sleep pressure at night, but only via reducing the effects of homeostatic sleep pressure during the day.

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Section: Diurnal Spectral Sensitivity Of the Acute Alerting Effects Osupporting

confidence: 63%

Diurnal Spectral Sensitivity of the Acute Alerting Effects of Light

Rahman

Flynn‐Evans

Aeschbach

et al. 2014

Sleep

166

168

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“…It can be related to the fact that the red colour has a stimulating effect and helps to increase alertness. Other findings support the idea that blue light improves performance (Lehrl et al, 2007). These findings are more convincing and report a more substantial effect on cognitive performance than the findings about the effect of red colour.…”

Section: On Adaptivity In Information Presentationsupporting

confidence: 55%

“…Cognitive performance is affected by the human's activation state, or alertness (Lehrl et al, 2007). Alertness is a physiological state that affects the attentional system and varies depending on internal and external factors (Thiffault and Bergeron, 2002).…”

Section: On Adaptivity In Information Presentationmentioning

confidence: 99%

An Integrative Agent Model for Adaptive Human-Aware Presentation of Information during Demanding Tasks

Mee¹,

Mogles²,

Treur³

2009

Active Media Technology

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Abstract. This paper presents an integrative agent model for adaptive human-aware information presentation. Within the agent model, meant to support humans in demanding tasks, a domain model is integrated which consists of a dynamical model for human functioning, and a model determining the effects of information presentation. The integrative agent model applies modelbased reasoning methods to the domain model to analyse the state of the human and to determine how to adapt the presentation of information to this state.

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“…Such effects include potential positive cognitive enhancement (18), increased alertness (19), and antidepressive effects (20) of blue light; these effects are counterbalanced by the negative effects of this portion of the spectrum when presented in the evening. Further study of these phenomena will be essential for informed policy on questions such as appropriate spectra of LED-based lighting and computer monitors.…”

mentioning

confidence: 99%

A tablet that shifts the clock

Gelder

2015

Proc. Natl. Acad. Sci. U.S.A.

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Blue light improves cognitive performance

Cited by 102 publications

References 12 publications

Diurnal Spectral Sensitivity of the Acute Alerting Effects of Light

Diurnal Spectral Sensitivity of the Acute Alerting Effects of Light

An Integrative Agent Model for Adaptive Human-Aware Presentation of Information during Demanding Tasks

A tablet that shifts the clock

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