Clément G, Rézette D
Exp Brain Res. 1985;59(3):478-84. doi: 10.1007/BF00261337.
The present study examines the control of equilibrium by trained acrobats standing balanced upside-down on their hands. The focus of the experiment was to analyze the postural attitudes of various body segments and the underlying motor activity, and to evaluate the influence of vision. We found a strong correlation between the motor activity of two antagonist muscles of the forearm and the anteriorposterior position of the center of gravity. The upside-down standing posture was most stable when the neck was dorsiflexed, indicating that the tonic neck reflex and the tonic labyrinthine reflex play an important role in the stability of this posture. Comparison between known data about the normal standing posture, on the feet, and the upside-down standing posture, on the hands, shows that motor behavior of the two postures is similarly organized.
本研究考察了经过训练的杂技演员用手倒立保持平衡时的平衡控制。实验重点是分析身体各部位的姿势态度及潜在的运动活动，并评估视觉的影响。我们发现前臂两块拮抗肌的运动活动与重心的前后位置之间存在很强的相关性。当颈部背屈时，倒立姿势最稳定，这表明紧张性颈反射和紧张性迷路反射在该姿势的稳定性中起重要作用。对已知的正常双脚站立姿势和手倒立姿势的数据进行比较表明，这两种姿势的运动行为组织方式相似。
