Kato M
Department of Physiology, Hokkaido University School of Medicine, Sapporo, Japan.
Neurosci Lett. 1992 Oct 12;145(2):129-32. doi: 10.1016/0304-3940(92)90003-p.
We have investigated interlimb coordination during walking by observing locomotion of cats on a grid. Control cats made no error in forelimb placement on the grid, and landed their hindlimbs on the rung where each ipsilateral forelimb left moments earlier. This suggests that locomotor command signals were modified by grid information including its size and direction and affected the pattern generators of both forelimbs and hindlimbs. Hemisected cats, made both at high cervical and lower thoracic, showed deteriorated placement of the hindlimbs suggesting that interlimb coordination is carried out mainly by descending pathways from the brainstem such as ventrolateral fasciculus and dorsolateral fasciculus. Interlimb reflex pathways may play a limited role.
我们通过观察猫在网格上的运动来研究行走过程中的肢体间协调。对照猫在网格上放置前肢时没有出错，后肢落在同侧前肢刚刚离开的横档上。这表明运动指令信号被包括网格大小和方向在内的网格信息所修改，并影响了前肢和后肢的模式发生器。在高颈段和下胸段进行半横切的猫，后肢放置情况变差，这表明肢体间协调主要由来自脑干的下行通路如腹外侧束和背外侧束来完成。肢体间反射通路可能起有限的作用。
