Crossed inhibition of the soleus H reflex during passive pedalling movement
Crossed inhibition of the soleus H reflex during passive pedalling movement
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DOI：
10.1016/s0006-8993(97)01168-2
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发表时间：
1998-01-01
期刊：
影响因子：
2.9
通讯作者：
Staines, WR
中科院分区：
文献类型：
--
作者：
Cheng, JG;Brooke, JD;Staines, WR
我们假设来自运动腿的感觉输入诱导对侧静止腿的比目鱼肌H反射通路的突触前抑制。结果表明，交叉抑制在被动蹬踏运动的腿，这是没有消除的比目鱼肌在静止的腿低水平的紧张性收缩。抑制与运动速度呈指数相关（R-2 = 0.934，P < 0.05），与运动腿通过的象限无关。静止腿静态屈曲引起同侧反射抑制（t = 5.590，P < 0.05），与另一腿的方向无关。我们的结论是，感觉流入从运动腿引起突触前抑制在静止的腿，在脊髓或大脑的感觉输入的复杂的转换的基础上的紧张性交叉抑制和相位同侧抑制，和下行运动命令施加一个强大的控制这些感觉运动的调制机制。(C)1998年Elsevier Science B.V.
We hypothesized that sensory input from the moving leg induces presynaptic inhibition of the soleus H reflex pathway in the contralateral stationary leg. The results showed a crossed inhibition during passive pedalling movement of the leg, which was not removed by low levels of tonic contraction of soleus in the stationary leg. The inhibition was correlated exponentially to the rate of the movement (R-2 = 0.934, P < 0.05) and was not dependent on the quadrants through which the moving leg was passing. Static flexion of the stationary leg caused ipsilateral inhibition of the reflexes (t = 5.590, P < 0.05), independent of the orientations of the other leg. We concluded that sensory inflow from the moving leg induces presynaptic inhibition in the stationary leg, that a complex transformation of the sensory input in the spinal cord or brain underlies the tonic crossed inhibition and phasic ipsilateral inhibition, and that descending motor commands exert a powerful control over these sensorimotor modulatory mechanisms. (C) 1998 Elsevier Science B.V.