Brooke J D, Misiaszek J E, Cheng J
School of Human Biology and Biophysics Interdepartmental Group, University of Guelph, Ontario, Canada.
Somatosens Mot Res. 1993;10(4):357-64. doi: 10.3109/08990229309028843.
Human soleus H reflexes are depressed with passive movement of the leg. We investigated the limb segment origin of this inhibition. In the first experiment, H reflexes were evoked in four subjects during (1) passive pedaling movement of the test leg at 60 rpm; (2 and 3) pedaling-like flexion and extension of the hip and the knee of the test leg separately; and (4) stationary controls. In the second experiment, with the test leg stationary, the same series of movements occurred in the opposite leg. Rotation of the hip or the knee of the test leg significantly reduced mean reflex amplitudes (p < 0.01) to levels similar to those for whole-leg movement (mean H reflexes: stationary, 71%; test leg pedaling movement, 10%; knee rotation, 15%; hip rotation, 13% [all data are given as percentages of Mmax]). The angle of the stationary joint did not significantly affect the results. Rotation of the contralateral hip significantly reduced mean reflex magnitudes. Rotation of the contralateral knee had a similar effect in three of the four subjects. We infer that a delimited field of receptors induces the movement conditioning of both the ipsilateral and contralateral spinal paths. It appears that somatosensory receptor discharge from movement of the hip or knee of either leg induces inhibition as the foundation for the modulation of H reflexes observed during human movement.
人体比目鱼肌的H反射会随着腿部的被动运动而受到抑制。我们研究了这种抑制作用的肢体节段起源。在第一个实验中，对4名受试者进行测试，分别在以下情况下诱发H反射：(1) 测试腿以60转/分钟的速度进行被动蹬踏运动；(2) 和(3) 分别对测试腿的髋关节和膝关节进行类似蹬踏的屈伸运动；(4) 静止对照。在第二个实验中，测试腿保持静止，对另一条腿进行相同系列的运动。测试腿的髋关节或膝关节的旋转显著降低了平均反射幅度（p<0.01），降至与全腿运动相似的水平（平均H反射：静止时为71%；测试腿蹬踏运动时为10%；膝关节旋转时为15%；髋关节旋转时为13% [所有数据均以Mmax的百分比表示]）。静止关节的角度对结果没有显著影响。对侧髋关节的旋转显著降低了平均反射幅度。在4名受试者中的3名中，对侧膝关节的旋转也有类似效果。我们推断，一个限定的感受器区域会诱发同侧和对侧脊髓通路的运动调节。似乎来自任何一条腿的髋关节或膝关节运动的体感感受器放电会诱发抑制作用，作为人类运动过程中观察到的H反射调制的基础。
