Analysis of Alertness and Diumal Rhythms in Astronauts before and after An Orbital Mission.
Ma Huan
Liu Zhizhen
Tian Yu
Wang Peiliang
Huang Weifen
Chen Xiaoping
Wang Chunhui
Chen Shanguang
Guo Jinhu
Abstract：Objective To analyze the changes in alertness and diumal rhythms of astronauts before and after a space mission,and investigate the impacts of orbital flight on the cognition and rhythmicity.Methods The alertness changes in three astronauts were detected with psychomotor vigilance task (PVT) before and after orbital flight.Results As compared with the data derived before flight,the PVT data of two astronauts after flight showed significant differences.The mean PVT value of the first astronaut decreased while the third increased.The mean PVT value of the second astronaut showed no difference before and after flight.These data suggested an individual difference in alertness changes due to the space mission.The changes of PVT data in diumal rhythm parameters were analyzed,which showed different alteration amongst the subjects before,during and after the mission.Conclusion Orbital flight may impose influence on the rhythms of cognitive performance and its diumal rhythimicity,and the influence also displays individual difference.
Keywords：orbital flightalertnesscircadian rhythmperformance
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 391-395 )