PHASIC GAIN CONTROL OF REFLEXES FROM DORSUM OF PAW DURING SPINAL LOCOMOTION
PHASIC GAIN CONTROL OF REFLEXES FROM DORSUM OF PAW DURING SPINAL LOCOMOTION
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DOI：
10.1016/0006-8993(77)90710-7
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发表时间：
1977-01-01
期刊：
影响因子：
2.9
通讯作者：
ROSSIGNOL, S
中科院分区：
文献类型：
--
作者：
FORSSBERG, H;GRILLNER, S;ROSSIGNOL, S
在慢性脊髓猫步行与他们的后肢上跑步机带，触觉刺激施加到爪背在各个阶段的步骤周期。在摆动阶段的刺激引起的屈曲反应，伴随着交叉延伸，而在立场，它引起了增加同侧的扩展。肌电图记录显示屈肌和伸肌分别有短潜伏期反射反应。组织的反应，使膝关节肌肉的韧带比踝关节和髋关节肌肉的韧带短。在正常条件下，刺激诱导的运动在补偿运动期间干扰爪运动的任何不可预测的障碍物方面似乎非常有意义。在前屈和在支持阶段的反应是很好地适应正在进行的运动活动，并没有影响肢体间的协调，而刺激时，接近地面的屈曲结束后，扰乱了定期的交替模式。不同的可能机制，这种相位依赖的反射逆转进行了讨论。
In chronic spinal cats walking with their hindlimbs on a treadmill belt, tactile stimuli were applied to the dorsum of the paw during various phases of the step cycle. A stimulation during the swing phase evoked a flexion response with a concomitant crossed extension, whereas in stance it induced an increased ipsilateral extension. EMG [electromyographic] recordings showed short latency reflex responses in flexors and extensors, respectively. The responses were organized such that latencies of knee muscles were shorter than those of ankle and hip muscles. The movements induced by the stimulations appeared to be very meaningful during normal conditions in compensating for any unpredicted obstacle disturbing the movement of the paw during locomotion. Responses during forward flexion and during the support phase were well adapted to the ongoing locomotor activity and did not influence the interlimb coordination whereas a stimulation when the foot approached the ground after the end of flexion disturbed the regular alternating pattern. Different possible mechanisms underlying this phase-dependent reflex reversal were discussed.