Selective activation of muscle groups in the feline hindlimb through electrical microstimulation of the ventral lumbo-sacral spinal cord
Selective activation of muscle groups in the feline hindlimb through electrical microstimulation of the ventral lumbo-sacral spinal cord
复制标题
DOI：
10.1109/86.830944
复制
发表时间：
2000-03-01
期刊：
影响因子：
--
通讯作者：
Horch, KW
中科院分区：
文献类型：
--
作者：
Mushahwar, VK;Horch, KW
研究了电刺激猫腰骶脊髓腹侧对猫后肢肌群的选择性激活作用。使用穿透钨针电极标测脊髓L5至S1节段。当用40 μ A或更小的电流刺激时，产生四头肌、胫骨前肌或小腿三头肌/跖肌的孤立收缩的位置，以及在将刺激增加到至少两倍阈值水平后未检测到活动扩散到其他肌肉的位置，被定义为属于目标肌肉的“激活池”。股四头肌激活池从L5的开始延伸到L 6的中部，胫骨前肌激活池从L 6的开始延伸到L7的中部，小腿三头肌/跖三头肌激活池从L 6的尾端延伸到S1的开始。这三个激活池位于Rexed运动板IX和他们的空间组织被认为是对应的解剖定义的运动池支配相同的肌肉。在脊髓水平表现出的运动池的空间和功能分离可以在功能性电刺激和运动控制领域中具有直接应用。
Selective activation of muscle groups in the feline hindlimb by electrical stimulation of the ventral lumbo-sacral spinal cord was investigated. Spinal cord segments L5 to S1 were mapped using a penetrating tungsten needle electrode. Locations that produced isolated contraction of quadriceps, tibialis anterior or triceps surae/plantaris muscles when stimulated with a current of 40 mu A or less, and in which spread of activity to other muscles was not detected after increasing the stimulus to at least twice the threshold level, were defined as belonging to the target muscle's "activation pool." The quadriceps activation pool was found to extend from the beginning of L5 to the middle of L6, The tibialis anterior activation pool extended from the beginning of L6 to the middle of L7, and the triceps surae/plantaris activation pool extended from the caudal end of L6 to the beginning of S1. The three activation pools were located in Rexed motor lamina IX and their spatial organization was found to correspond well with that of the anatomically defined motor pools innervating the same muscles. The spatial and functional segregation of motor pools manifested at the spinal cord level can have direct applications in the areas of functional electrical stimulation and motor control.