Clément G, Gurfinkel V S, Lestienne F, Lipshits M I, Popov K E
Aviat Space Environ Med. 1985 Jul;56(7):666-71.
The control of goal-directed arm movement and of body stability before, during, and 3 d after a 7-d spaceflight has been investigated. The findings show that the anticipatory and compensatory activities of the postural muscles were highly reproducible during the first days of the space mission. The sequence of these activities, studied in two situations--in which the platform either was fixed or could rotate about near the rotation axis of the ankle--was similar to a ground-based situation. The trajectory of various body segments demonstrates that a 7-d exposure to microgravity did not result in major changes in posture. Furthermore, vision seemed to play an important role in the control of standing posture at the beginning of the flight. Postural perturbations, elicited by unexpected displacements of the foot support, involved leg muscle reflexes whose amplitudes were greatly reduced compared to those on earth.
对为期7天的太空飞行前、飞行期间及飞行后3天内目标导向性手臂运动和身体稳定性的控制进行了研究。研究结果表明，在太空任务的最初几天，姿势肌肉的预期和补偿活动具有高度可重复性。在两种情况下研究了这些活动的顺序——平台要么固定，要么可绕踝关节旋转轴附近旋转——这与地面情况相似。身体各部位的轨迹表明，7天的微重力暴露并未导致姿势发生重大变化。此外，在飞行开始时，视觉似乎在站立姿势的控制中发挥重要作用。由足部支撑意外位移引起的姿势扰动涉及腿部肌肉反射，其幅度与在地球上相比大幅降低。
