Executive function on the 16-day of bed rest in young healthy men

Yuko Ishizaki*, Hideoki Fukuoka, Hidetaka Tanaka, Tatsuro Ishizaki, Yuri Fujii, Yuko Hattori-Uchida, Minako Nakamura, Kaoru Ohkawa, Hodaka Kobayashi, Shoichiro Taniuchi, Kazunari Kaneko

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)864-868
Number of pages5
JournalActa Astronautica
Issue number9-10
Publication statusPublished - 2009 May
Externally publishedYes

ASJC Scopus subject areas

  • Aerospace Engineering


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