Executive function on the 16-day of bed rest in young healthy men |
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| Authors: | Yuko Ishizaki Hideoki Fukuoka Hidetaka Tanaka Tatsuro Ishizaki Yuri Fujii Yuko Hattori-Uchida Minako Nakamura Kaoru Ohkawa Hodaka Kobayashi Shoichiro Taniuchi Kazunari Kaneko |
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| Institution: | 1. Department of Pediatrics, Kansai Medical University, Fumizono-cho 10-15, Moriguchi, Osaka 570-8506, Japan;2. Department of Developmental Medical Sciences, University of Tokyo, Hongo 7-3-1, Bunkyo, Tokyo 113-0033, Japan;3. Department of Pediatrics, Osaka Medical College, 2-7 Daigaku-cho, Takatsuki, Osaka 569-8686, Japan;4. Department of Healthcare and Economics and Quality Management, School of Public Health, Kyoto University, Yoshida Konoecho, Kyoto 606-8501, Japan;1. Department of Psychological Sciences, Purdue University, United States;2. Department of Psychology, University of Maine, Maine Graduate School of Biomedical Sciences and Engineering, United States;3. VA San Diego Healthcare System, University of California, San Diego, United States;4. Department of Psychology, University of Texas, Austin, United States;1. Department of Experimental Psychology, Ghent University, Belgium;2. Laboratoire de Neurosciences Cognitives, UMR7291, Aix-Marseille Université, CNRS, Marseille, France;1. Forensic Chemistry and Toxicology Unit, University Center of Legal Medicine Lausanne – Geneva, CH-1011 Lausanne, Switzerland;2. Forensic Imaging Unit, University Center of Legal Medicine Lausanne – Geneva, CH-1011 Lausanne, Switzerland;3. HESAV – Department of Radiography, Avenue de Beaumont 21, CH-1011 Lausanne, Switzerland;4. Department of Diagnostic and Interventional Radiology, University Hospital of Lausanne, Bugnon 46, 1011 Lausanne, Switzerland |
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| Abstract: | Microgravity due to prolonged bed rest may cause changes in cerebral circulation, which is related to brain function. We evaluate the effect of simulated microgravity due to a 6° head-down tilt bed rest experiment on executive function among 12 healthy young men. Four kinds of psychoneurological tests—the table tapping test, the trail making test, the pointing test and losing at rock–paper–scissors—were performed on the baseline and on day 16 of the experiment. There was no significant difference in the results between the baseline and day 16 on all tests, which indicated that executive function was not impaired by the 16-day 6° head-down tilting bed rest. However, we cannot conclude that microgravity did not affect executive function because of the possible contribution of the following factors: (1) the timing of tests, (2) the learning effect, or (3) changes in psychophysiology that were too small to affect higher brain function. |
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