Night Shift and Decreased Brain Activity of ICU Nurses: A Near-Infrared Spectroscopy Study

Background: Shift working is associated with a profound desynchronization of circadian rhythm and in particular, night-shift work disrupts normal circadian physiology. Sleep deprivation affects the functioning of certain brain areas and thus impairs cognitive performance. The purpose of this study w...

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Autores principales:	Noelia Durán-Gómez, Jorge Guerrero-Martín, Demetrio Pérez-Civantos, Casimiro Fermín López-Jurado, Jesús Montanero-Fernández, Macarena C. Cáceres
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	nurses night shift sleep anxiety dorsolateral prefrontal cortex Medicine R
Acceso en línea:	https://doaj.org/article/51da2e7f9e144e6caca09c77df7c4bc2
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spelling	oai:doaj.org-article:51da2e7f9e144e6caca09c77df7c4bc22021-11-25T17:49:33ZNight Shift and Decreased Brain Activity of ICU Nurses: A Near-Infrared Spectroscopy Study10.3390/ijerph1822119301660-46011661-7827https://doaj.org/article/51da2e7f9e144e6caca09c77df7c4bc22021-11-01T00:00:00Zhttps://www.mdpi.com/1660-4601/18/22/11930https://doaj.org/toc/1661-7827https://doaj.org/toc/1660-4601Background: Shift working is associated with a profound desynchronization of circadian rhythm and in particular, night-shift work disrupts normal circadian physiology. Sleep deprivation affects the functioning of certain brain areas and thus impairs cognitive performance. The purpose of this study was to investigate the effects of the night shift on cognitive performance and cerebral oxygenation/haemodynamics. Methods: A prospective, observational, comparative, randomized and cross-over study was carried out. A total of 74 intensive care unit nurses in Spain were included in the study. The following variables were measured: sociodemographic, burnout, anxiety, baseline cerebral oxygenation levels on night and day shift using a near-infrared spectroscopy system and cognitive task performance during a verbal fluency task to evaluate the alterations in the prefrontal cortex, assessed as changes in regional saturation index. Results: The average regional saturation index decreased significantly in the night shift (r = 0.560, <i>p</i> < 0.001). The ICU nurses showed a significant decrease in the verbal fluency test on average (8.53 ± 8.49, <i>p</i> < 0.001) and, in general, there was also a significant increase in anxiety score (3.17 ± 7.56, <i>p</i> = 0.001). Conclusions: Sleep deprivation during the night shift was considered to be related to decreased dorsolateral PFC reactivity. After the night shift, the nurses showed a decrease in prefrontal cortex activity and in cognitive performance.Noelia Durán-GómezJorge Guerrero-MartínDemetrio Pérez-CivantosCasimiro Fermín López-JuradoJesús Montanero-FernándezMacarena C. CáceresMDPI AGarticlenursesnightshiftsleepanxietydorsolateral prefrontal cortexMedicineRENInternational Journal of Environmental Research and Public Health, Vol 18, Iss 11930, p 11930 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	nurses night shift sleep anxiety dorsolateral prefrontal cortex Medicine R
spellingShingle	nurses night shift sleep anxiety dorsolateral prefrontal cortex Medicine R Noelia Durán-Gómez Jorge Guerrero-Martín Demetrio Pérez-Civantos Casimiro Fermín López-Jurado Jesús Montanero-Fernández Macarena C. Cáceres Night Shift and Decreased Brain Activity of ICU Nurses: A Near-Infrared Spectroscopy Study
description	Background: Shift working is associated with a profound desynchronization of circadian rhythm and in particular, night-shift work disrupts normal circadian physiology. Sleep deprivation affects the functioning of certain brain areas and thus impairs cognitive performance. The purpose of this study was to investigate the effects of the night shift on cognitive performance and cerebral oxygenation/haemodynamics. Methods: A prospective, observational, comparative, randomized and cross-over study was carried out. A total of 74 intensive care unit nurses in Spain were included in the study. The following variables were measured: sociodemographic, burnout, anxiety, baseline cerebral oxygenation levels on night and day shift using a near-infrared spectroscopy system and cognitive task performance during a verbal fluency task to evaluate the alterations in the prefrontal cortex, assessed as changes in regional saturation index. Results: The average regional saturation index decreased significantly in the night shift (r = 0.560, <i>p</i> < 0.001). The ICU nurses showed a significant decrease in the verbal fluency test on average (8.53 ± 8.49, <i>p</i> < 0.001) and, in general, there was also a significant increase in anxiety score (3.17 ± 7.56, <i>p</i> = 0.001). Conclusions: Sleep deprivation during the night shift was considered to be related to decreased dorsolateral PFC reactivity. After the night shift, the nurses showed a decrease in prefrontal cortex activity and in cognitive performance.
format	article
author	Noelia Durán-Gómez Jorge Guerrero-Martín Demetrio Pérez-Civantos Casimiro Fermín López-Jurado Jesús Montanero-Fernández Macarena C. Cáceres
author_facet	Noelia Durán-Gómez Jorge Guerrero-Martín Demetrio Pérez-Civantos Casimiro Fermín López-Jurado Jesús Montanero-Fernández Macarena C. Cáceres
author_sort	Noelia Durán-Gómez
title	Night Shift and Decreased Brain Activity of ICU Nurses: A Near-Infrared Spectroscopy Study
title_short	Night Shift and Decreased Brain Activity of ICU Nurses: A Near-Infrared Spectroscopy Study
title_full	Night Shift and Decreased Brain Activity of ICU Nurses: A Near-Infrared Spectroscopy Study
title_fullStr	Night Shift and Decreased Brain Activity of ICU Nurses: A Near-Infrared Spectroscopy Study
title_full_unstemmed	Night Shift and Decreased Brain Activity of ICU Nurses: A Near-Infrared Spectroscopy Study
title_sort	night shift and decreased brain activity of icu nurses: a near-infrared spectroscopy study
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/51da2e7f9e144e6caca09c77df7c4bc2
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Night Shift and Decreased Brain Activity of ICU Nurses: A Near-Infrared Spectroscopy Study

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