Bussel B, Morin C, Pierrot-Deseilligny E
J Neurol Neurosurg Psychiatry. 1978 Jan;41(1):40-4. doi: 10.1136/jnnp.41.1.40.
The facilitating effect of the Jendrassik manoeuvre on monosynaptic reflexes in man has been studied by comparing H and T reflexes of the soleus and by blocking the effects of spindle activation by ischaemia of the leg. The Jendrassik manoeuvre equally enhances H and T reflexes provided that the test reflexes are small. The H reflex remains facilitated when the spindle activation cannot affect the soleus alpha-motoneurones--that is, when the Ia afferent nerve fibres from the soleus are blocked by ischaemia. It is concluded that the facilitating effect of the Jendrassik manoeuvre on the alpha-motoneurones is not predominantly routed via the gamma-loop.
通过比较比目鱼肌的H反射和T反射,并通过腿部缺血阻断肌梭激活的影响,研究了Jendrassik动作对人体单突触反射的促进作用。只要测试反射较小,Jendrassik动作就会同等程度地增强H反射和T反射。当肌梭激活不能影响比目鱼肌α运动神经元时,即当来自比目鱼肌的Ia传入神经纤维被缺血阻断时,H反射仍会受到促进。由此得出结论,Jendrassik动作对α运动神经元的促进作用并非主要通过γ环路传导。