Hiraoka K, Nagata A
Department of Physical Therapy, College of Physical and Occupational Therapy of Hakone National Hospital, Kanagawa, Japan.
Electromyogr Clin Neurophysiol. 1999 Jan-Feb;39(1):21-6.
Modulation of the gain of the soleus H reflex pathway produced by passive movement of the elbow joint was investigated and compared to that produced by passively maintained displacement of the elbow joint position. Little modulation of the gain of the soleus H reflex pathway was observed during passive displacement of the elbow joint position. In contrast, passive movement of the elbow joint facilitated the gain of the soleus H reflex amplitude and the degree of modulation was large as the velocity increased. The degree of the facilitatory effect upon passive movement of the upper extremity ipsilateral to the leg under test was larger than that obtained upon passive movement of the upper extremity contralateral to the leg under test. The modulation may be caused by discharge at the primary endings of the spindles in the upper extremity which is likely to excite propriospinal interneurons connecting to motor neurons of the lower extremity.
研究了肘关节被动运动对比目鱼肌H反射通路增益的调制作用，并与肘关节位置被动维持性位移所产生的调制作用进行了比较。在肘关节位置被动位移过程中，未观察到比目鱼肌H反射通路增益的明显调制。相比之下，肘关节的被动运动会促进比目鱼肌H反射幅度的增益，且随着速度增加，调制程度增大。对受试腿同侧上肢进行被动运动时的促进作用程度大于对受试腿对侧上肢进行被动运动时的促进作用程度。这种调制可能是由上肢肌梭初级末梢的放电引起的，这种放电可能会兴奋连接到下肢运动神经元的脊髓 propriospinal 中间神经元。
