Clément G, Lestienne F
Laboratoire de Physiologie Neurosensorielle du CNRS, Paris, France.
Exp Brain Res. 1988;72(2):381-9. doi: 10.1007/BF00250259.
Adaptation of static posture was studied before, during, and after a 7-day space flight. Body segment orientations, body stability, and muscle activity underlying the reproduction of several postural attitudes were examined in various visual situations either with the shoes attached to the floor or during free floating. In standing or relaxed subjects whose shoes were attached to the floor, the tonic activity of the ankle flexor was enhanced relative to that in the same posture on earth, whereas the extensor activity disappeared. Errors in attempting to reproduce the normal terrestrial upright posture and a forward-leaning posture were accompanied by major changes in the synergies between neck, hip, knee, and ankle joints. These changes are mainly attributed to cumulative adjustments in response to nonvestibular signals such as tactile, articular, and proprioceptive cues.
在为期7天的太空飞行前、飞行期间和飞行后，对静态姿势的适应性进行了研究。在各种视觉情况下，无论是鞋子固定在地板上还是处于自由漂浮状态，都对身体各节段的方向、身体稳定性以及几种姿势再现背后的肌肉活动进行了检查。在鞋子固定在地板上的站立或放松受试者中，相对于在地球上相同姿势时，踝屈肌的紧张性活动增强，而伸肌活动消失。试图再现正常地面直立姿势和前倾姿势时的误差，伴随着颈部、髋部、膝部和踝关节之间协同作用的重大变化。这些变化主要归因于对触觉、关节和本体感觉线索等非前庭信号的累积调整。
