Noé Frédéric, Quaine F, Martin L
Laboratoire Sport et Performance Motrice, Université Joseph Fourier Grenoble 1, UFRAPS, BP 53, 38041 Grenoble Cedex 9, France.
Neurosci Lett. 2004 Mar 25;358(2):115-8. doi: 10.1016/j.neulet.2004.01.009.
We studied the anticipatory postural adjustments (APAs) associated with a voluntary rocking on heels movement performed in a self-paced manner. Ground reaction forces and the EMG activity of the leg muscles were recorded. Such a movement shifted the centre of gravity (CG) backwards, due to APAs on the lower limbs. It is generally assumed that APAs only generate corrections in the opposite direction to the perturbation due to the focal movement. However, our study shows that APAs, by creating the initial backward oriented impulse, displace the CG backwards and generate the dynamic conditions required to move.
我们研究了与以自定节奏进行的足跟踮起的自愿性摇摆运动相关的预期姿势调整（APA）。记录了地面反作用力和腿部肌肉的肌电图活动。由于下肢的APA，这种运动会使重心（CG）向后移动。一般认为，APA仅产生与焦点运动引起的扰动方向相反的校正。然而，我们的研究表明，APA通过产生初始向后的冲动，使CG向后移位并产生移动所需的动态条件。
