Gurfinkel V S, Lipshits M I, Lestienne F G
Laboratoire de Physiologie Neurosensorielle, C.N.R.S., Paris, France.
Neurosci Lett. 1988 Nov 22;94(1-2):104-8. doi: 10.1016/0304-3940(88)90278-9.
This study reveals the existence of a backward acceleration of the head prior to the onset of voluntary raising movements of the upper limb. This backward acceleration is produced by the displacement of the head-trunk as a whole. The anticipatory head movement is organized according to a sequence of activation and desactivation of the neck muscles, time locked with the anticipatory leg muscle activity. These findings highlight the existence of a complex postural behavior selected in advance of movement. It is proposed that the feedforward type of neural control of neck muscles should not be interpreted as a compensation to postural perturbation. This anticipatory process might play an important role in the widespread postural fixation of the cervical and dorsal spine.
本研究揭示了在上肢自主上举运动开始之前头部存在向后加速的现象。这种向后加速是由头部 - 躯干整体的位移产生的。预期性头部运动是根据颈部肌肉激活和去激活的顺序组织的，与预期性腿部肌肉活动时间锁定。这些发现突出了在运动之前就已选定的复杂姿势行为的存在。有人提出，颈部肌肉的前馈型神经控制不应被解释为对姿势扰动的补偿。这个预期过程可能在颈椎和胸椎的广泛姿势固定中起重要作用。
