Color-dependent changes in humans during a verbal fluency task under colored light exposure assessed by SPA-fNIRS

Abstract Light evokes robust visual and nonvisual physiological and psychological effects in humans, such as emotional and behavioral responses, as well as changes in cognitive brain activity and performance. The aim of this study was to investigate how colored light exposure (CLE) and a verbal flue...

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Autores principales:	Hamoon Zohdi, Rahel Egli, Daniel Guthruf, Felix Scholkmann, Ursula Wolf
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f5a4844b303241329aea0439da974001
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spelling	oai:doaj.org-article:f5a4844b303241329aea0439da9740012021-12-02T14:49:26ZColor-dependent changes in humans during a verbal fluency task under colored light exposure assessed by SPA-fNIRS10.1038/s41598-021-88059-02045-2322https://doaj.org/article/f5a4844b303241329aea0439da9740012021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88059-0https://doaj.org/toc/2045-2322Abstract Light evokes robust visual and nonvisual physiological and psychological effects in humans, such as emotional and behavioral responses, as well as changes in cognitive brain activity and performance. The aim of this study was to investigate how colored light exposure (CLE) and a verbal fluency task (VFT) interact and affect cerebral hemodynamics, oxygenation, and systemic physiology as determined by systemic physiology augmented functional near-infrared spectroscopy (SPA-fNIRS). 32 healthy adults (17 female, 15 male, age: 25.5 ± 4.3 years) were exposed to blue and red light for 9 min while performing a VFT. Before and after the CLE, subjects were in darkness. We found that this long-term CLE-VFT paradigm elicited distinct changes in the prefrontal cortex and in most systemic physiological parameters. The subjects’ performance depended significantly on the type of VFT and the sex of the subject. Compared to red light, blue evoked stronger responses in cerebral hemodynamics and oxygenation in the visual cortex. Color-dependent changes were evident in the recovery phase of several systemic physiological parameters. This study showed that the CLE has effects that endure at least 15 min after cessation of the CLE. This underlines the importance of considering the persistent influence of colored light on brain function, cognition, and systemic physiology in everyday life.Hamoon ZohdiRahel EgliDaniel GuthrufFelix ScholkmannUrsula WolfNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hamoon Zohdi Rahel Egli Daniel Guthruf Felix Scholkmann Ursula Wolf Color-dependent changes in humans during a verbal fluency task under colored light exposure assessed by SPA-fNIRS
description	Abstract Light evokes robust visual and nonvisual physiological and psychological effects in humans, such as emotional and behavioral responses, as well as changes in cognitive brain activity and performance. The aim of this study was to investigate how colored light exposure (CLE) and a verbal fluency task (VFT) interact and affect cerebral hemodynamics, oxygenation, and systemic physiology as determined by systemic physiology augmented functional near-infrared spectroscopy (SPA-fNIRS). 32 healthy adults (17 female, 15 male, age: 25.5 ± 4.3 years) were exposed to blue and red light for 9 min while performing a VFT. Before and after the CLE, subjects were in darkness. We found that this long-term CLE-VFT paradigm elicited distinct changes in the prefrontal cortex and in most systemic physiological parameters. The subjects’ performance depended significantly on the type of VFT and the sex of the subject. Compared to red light, blue evoked stronger responses in cerebral hemodynamics and oxygenation in the visual cortex. Color-dependent changes were evident in the recovery phase of several systemic physiological parameters. This study showed that the CLE has effects that endure at least 15 min after cessation of the CLE. This underlines the importance of considering the persistent influence of colored light on brain function, cognition, and systemic physiology in everyday life.
format	article
author	Hamoon Zohdi Rahel Egli Daniel Guthruf Felix Scholkmann Ursula Wolf
author_facet	Hamoon Zohdi Rahel Egli Daniel Guthruf Felix Scholkmann Ursula Wolf
author_sort	Hamoon Zohdi
title	Color-dependent changes in humans during a verbal fluency task under colored light exposure assessed by SPA-fNIRS
title_short	Color-dependent changes in humans during a verbal fluency task under colored light exposure assessed by SPA-fNIRS
title_full	Color-dependent changes in humans during a verbal fluency task under colored light exposure assessed by SPA-fNIRS
title_fullStr	Color-dependent changes in humans during a verbal fluency task under colored light exposure assessed by SPA-fNIRS
title_full_unstemmed	Color-dependent changes in humans during a verbal fluency task under colored light exposure assessed by SPA-fNIRS
title_sort	color-dependent changes in humans during a verbal fluency task under colored light exposure assessed by spa-fnirs
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f5a4844b303241329aea0439da974001
work_keys_str_mv	AT hamoonzohdi colordependentchangesinhumansduringaverbalfluencytaskundercoloredlightexposureassessedbyspafnirs AT rahelegli colordependentchangesinhumansduringaverbalfluencytaskundercoloredlightexposureassessedbyspafnirs AT danielguthruf colordependentchangesinhumansduringaverbalfluencytaskundercoloredlightexposureassessedbyspafnirs AT felixscholkmann colordependentchangesinhumansduringaverbalfluencytaskundercoloredlightexposureassessedbyspafnirs AT ursulawolf colordependentchangesinhumansduringaverbalfluencytaskundercoloredlightexposureassessedbyspafnirs
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Color-dependent changes in humans during a verbal fluency task under colored light exposure assessed by SPA-fNIRS

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