Effects of prolonged head-down bed rest on working memory

Qing Liu,1,2 Renlai Zhou,1–4 Xin Zhao,5 Tian Po S Oei6 1Beijing Key Lab of Applied Experimental Psychology, School of Psychology, 2Research Center of Emotion Regulation, 3State Key Laboratory of Cognitive Neuroscience and Learning, International Data Group/McGovern Institute for Brain Re...

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Autores principales:	Liu Q, Zhou R, Zhao X, Oei TPS
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2015
Materias:	Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Neurology. Diseases of the nervous system RC346-429
Acceso en línea:	https://doaj.org/article/c1483df393b6467fac0954b225847eec
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spelling	oai:doaj.org-article:c1483df393b6467fac0954b225847eec2021-12-02T01:16:27ZEffects of prolonged head-down bed rest on working memory1178-2021https://doaj.org/article/c1483df393b6467fac0954b225847eec2015-03-01T00:00:00Zhttp://www.dovepress.com/effects-of-prolonged-head-down-bed-rest-on-working-memory-peer-reviewed-article-NDThttps://doaj.org/toc/1178-2021 Qing Liu,1,2 Renlai Zhou,1–4 Xin Zhao,5 Tian Po S Oei6 1Beijing Key Lab of Applied Experimental Psychology, School of Psychology, 2Research Center of Emotion Regulation, 3State Key Laboratory of Cognitive Neuroscience and Learning, International Data Group/McGovern Institute for Brain Research, Beijing Normal University, Beijing, People’s Republic of China; 4Department of Psychology, School of Social and Behavioral Science, Nanjing University, Nanjing, People’s Republic of China; 5Behavior Rehabilitation Training Research Institution, School of Psychology, Northwest Normal University, Lanzhou, People’s Republic of China; 6School of Psychology, University of Queensland, Brisbane, QLD, Australia Background: The weightlessness caused by prolonged bed rest results in changes in cerebral circulation and thus, brain functions, which is of interest. Methods: We investigated the effects of 45-day, -6° head-down bed rest, which stimulated microgravity, on working memory in 16 healthy male participants. The 2-back task was used to test the working memory variations on the 2nd day before bed rest (R-2); on the 11th (R11), 20th (R20), 32nd (R32), and 40th (R40) days of bed rest; and on the eighth day after bed rest (R+8). The cognitive response and the physiological reactivity (such as galvanic skin response, heart rate, and heart rate variability) under the 2-back task were recorded simultaneously. Results: The results showed that compared with R-2, on the R+8, the participants’ galvanic skin response increased significantly, and the high frequency of heart rate variability (HF), low frequency of heart rate variability (LF), and reaction time in the 2-back task decreased significantly. There were positive correlations between the participants’ reaction time of working memory and the LF/HF under head-down bed rest (at R11, R20, and R32). Conclusion: The results suggested that the prolonged head-down bed rest may have a detrimental effect on individual physiology and working memory. Physiology indices, such as galvanic skin response and heart rate variability, were sensitive to the prolonged bed rest. Keywords: galvanic skin response, heart rate, heart rate variabilityLiu QZhou RZhao XOei TPSDove Medical PressarticleNeurosciences. Biological psychiatry. NeuropsychiatryRC321-571Neurology. Diseases of the nervous systemRC346-429ENNeuropsychiatric Disease and Treatment, Vol 2015, Iss default, Pp 835-842 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Neurology. Diseases of the nervous system RC346-429
spellingShingle	Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Neurology. Diseases of the nervous system RC346-429 Liu Q Zhou R Zhao X Oei TPS Effects of prolonged head-down bed rest on working memory
description	Qing Liu,1,2 Renlai Zhou,1–4 Xin Zhao,5 Tian Po S Oei6 1Beijing Key Lab of Applied Experimental Psychology, School of Psychology, 2Research Center of Emotion Regulation, 3State Key Laboratory of Cognitive Neuroscience and Learning, International Data Group/McGovern Institute for Brain Research, Beijing Normal University, Beijing, People’s Republic of China; 4Department of Psychology, School of Social and Behavioral Science, Nanjing University, Nanjing, People’s Republic of China; 5Behavior Rehabilitation Training Research Institution, School of Psychology, Northwest Normal University, Lanzhou, People’s Republic of China; 6School of Psychology, University of Queensland, Brisbane, QLD, Australia Background: The weightlessness caused by prolonged bed rest results in changes in cerebral circulation and thus, brain functions, which is of interest. Methods: We investigated the effects of 45-day, -6° head-down bed rest, which stimulated microgravity, on working memory in 16 healthy male participants. The 2-back task was used to test the working memory variations on the 2nd day before bed rest (R-2); on the 11th (R11), 20th (R20), 32nd (R32), and 40th (R40) days of bed rest; and on the eighth day after bed rest (R+8). The cognitive response and the physiological reactivity (such as galvanic skin response, heart rate, and heart rate variability) under the 2-back task were recorded simultaneously. Results: The results showed that compared with R-2, on the R+8, the participants’ galvanic skin response increased significantly, and the high frequency of heart rate variability (HF), low frequency of heart rate variability (LF), and reaction time in the 2-back task decreased significantly. There were positive correlations between the participants’ reaction time of working memory and the LF/HF under head-down bed rest (at R11, R20, and R32). Conclusion: The results suggested that the prolonged head-down bed rest may have a detrimental effect on individual physiology and working memory. Physiology indices, such as galvanic skin response and heart rate variability, were sensitive to the prolonged bed rest. Keywords: galvanic skin response, heart rate, heart rate variability
format	article
author	Liu Q Zhou R Zhao X Oei TPS
author_facet	Liu Q Zhou R Zhao X Oei TPS
author_sort	Liu Q
title	Effects of prolonged head-down bed rest on working memory
title_short	Effects of prolonged head-down bed rest on working memory
title_full	Effects of prolonged head-down bed rest on working memory
title_fullStr	Effects of prolonged head-down bed rest on working memory
title_full_unstemmed	Effects of prolonged head-down bed rest on working memory
title_sort	effects of prolonged head-down bed rest on working memory
publisher	Dove Medical Press
publishDate	2015
url	https://doaj.org/article/c1483df393b6467fac0954b225847eec
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Effects of prolonged head-down bed rest on working memory

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