Local loss of proprioception results in disruption of interjoint coordination during locomotion in the cat
Local loss of proprioception results in disruption of interjoint coordination during locomotion in the cat
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DOI：
10.1152/jn.2000.84.5.2709
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发表时间：
2000-11-01
影响因子：
2.5
通讯作者：
Nichols, TR
中科院分区：
文献类型：
--
作者：
Abelew, TA;Miller, MD;Nichols, TR
要调查的作用，本地化的，本体感觉反馈在运动过程中的关节间协调的调节，我们大大衰减的小腿三头肌肌肉的神经反馈，在每一个后肢在四只猫使用的方法自我神经支配。在允许运动神经支配恢复后，在水平和坡道行走期间拍摄动物。在水平表面或坡道上行走时，缺陷很小或无法检测到，这些行为需要小腿三头肌肌肉的大范围力量。在走下坡路时，小腿三头肌在正常情况下进行主动延长，踝关节发生了较大的屈服，踝膝之间的协调性被破坏。的相关性的赤字与方向的长度变化，而不是肌肉力量表明，从肌梭受体的反馈损失是主要负责赤字。这些结果表明，运动过程中的牵张反射和刚度调节的重要作用。
To investigate the role of localized, proprioceptive feedback in the regulation of interjoint coordination during locomotion, we substantially attenuated neural feedback from the triceps surae muscles in one hindlimb in each of four cats using the method of self-reinnervation. After allowing the recovery of motor innervation, the animals were filmed during level and ramp walking. Deficits were small or undetectable during walking on the level surface or up the ramp, behaviors that require a large range of forces in the triceps surae muscles. During walking down the ramp, when the triceps surae muscles normally undergo active lengthening, the ankle joint underwent a large yield and the coordination between ankle and knee was disrupted. The correlation of the deficit with the direction of length change and not muscle force suggested that a loss of feedback from muscle spindle receptors was primarily responsible for the deficit. These results indicate an important role for the stretch reflex and stiffness regulation during locomotion.