先前阈下肌腱反射刺激对H反射的条件作用。
Conditioning of H reflex by a preceding subthreshold tendon reflex stimulus.
作者信息
Katz R, Morin C, Pierrot-Deseilligny E, Hibino R
出版信息
J Neurol Neurosurg Psychiatry. 1977 Jun;40(6):575-80. doi: 10.1136/jnnp.40.6.575.
Abstract
The soleus H reflex excitability cycle has been studied using, as conditioning stimulus, a mechanical tap, subthreshold for the tendon reflex, which was applied either on the Achilles tendon, the short biceps tendon, or the quadriceps tendon. In all cases there was an early facilitation followed by a longlasting inhibition of the test H reflex. The same results were obtained in patients with a complete spinal cord section. Wherever the site of the conditioning stimulation, these modifications disappeared after ischaemia of the leg. It is concluded that the effects observed are due to the activation by the tendon tap of the Ia nerve fibres from the soleus muscle, and that the longlasting inhibition is probably due to a transmitter depletion.
摘要
已使用机械轻敲作为条件刺激来研究比目鱼肌H反射兴奋性周期，该轻敲强度低于肌腱反射阈值，施加于跟腱、肱二头肌短肌腱或股四头肌肌腱。在所有情况下，均出现早期易化，随后对测试H反射产生持久抑制。在完全性脊髓横断患者中也获得了相同结果。无论条件刺激的部位在哪里，腿部缺血后这些改变都会消失。得出的结论是，观察到的效应是由于肌腱轻敲激活了比目鱼肌的Ia神经纤维，而持久抑制可能是由于递质耗竭所致。
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