「Effects of acute simulated microgravity on nocturnal sleep, daytime vigilance, and psychomotor performance: comparison of horizontal and 6 degree head-down bed rest」

This study examined the effect of acute simulated microgravity on nocturnal sleep, daytime vigilance, and psychomotor performance. The results suggest that nocturnal sleep, daytime vigilance, and psychophysiological functions were not disturbed in head-down condition, although there was a mild deterioration of higher attentional function in the morning. (急性の模擬微小重力環境が睡眠、日中の注意機能、および精神作業能力に及ぼす影響を検討し、午前中の高度な注意機能のみやや低減するという結果を得た。)
pp.307-317
Komada Y, Inoue Y, Mizuno K, Tanaka H, Shirakawa S

Percept Mot Skills