直線加速度負荷による耳石機能の変化と空間識・姿勢制御の研究 [in Japanese] Studies on Spatial Orientation and Posture Control and Changes in Otolith Function Due to Linear Acceleration Loading [in Japanese]
Access this Article
Search this Article
Otolith function is directly affected by weightlessness at the time of movement in outer space, and changes occur in the mode of response. It has been known for some time that such changes occur in the posture and gait of astronauts just after they return from a trip into space. It is thought that the cause of these changes is disuse atrophy of the antigravity muscles. However, in the present study, experimental subjects underwent repeated linear acceleration loading over a long period of time, and instability of the head and a decrease in posture control, especially in relation to the gait, were observed for the first time. To date, it has been said that the otolith function has a close relationship with ocular counter rolling. However, when the otolith organ was stimulated, the response was seen to be head instability and an irregular effect on the gait. It is surmised that these findings will facilitate future research into the otolith function under gravity-free conditions.
- Biological Sciences in Space
Biological Sciences in Space 13(1), 14-17, 1999-03
Japanese Society for Biological Sciences in Space