Pierrot-Deseilligny E, Bergego C, Katz R, Morin C
Exp Brain Res. 1981;42(3-4):351-61. doi: 10.1007/BF00237500.
Variations in the H-reflex of soleus (Sol), quadriceps (Q) and short head of biceps femoris (Bi) muscles in normal man were used to investigate the effect of volleys in low threshold cutaneous afferents from the ipsilateral limb on transmission of Ib effects from ankle and Q muscles to these different motoneurone (MN) pools. Stimulation of cutaneous afferents from the foot sole and the toes (but not from the thigh, knee or calf), which did not modify the size of the test reflexes when applied alone, strongly depressed Ib reflex pathways to MNs supplying muscles operating at the knee. The very brief central latency of this depression suggests that tactile cutaneous afferents from the foot have oligosynaptic spinal connexions with the interneurones intercalated in the Ib pathways to MNs. The same cutaneous stimuli did not all modify Ib inhibition of Sol MNs from triceps surae. These findings are discussed with regard to the role of the different muscles in human locomotion. It is suggested that during the stance phase of heel bipedal locomotion, the cutaneous depression of Ib reflex pathways to MNs supplying muscles operating at the knee might operate in association with the strong Ia connexions from ankle to knee muscles described in the previous paper.
通过研究正常人体中比目鱼肌（Sol）、股四头肌（Q）和股二头肌短头（Bi）的H反射变化，来探究同侧肢体低阈值皮肤传入神经冲动对从踝关节和Q肌到不同运动神经元（MN）池的Ib类效应传递的影响。刺激足底和脚趾的皮肤传入神经（但不包括大腿、膝盖或小腿的皮肤传入神经），单独施加时不会改变测试反射的大小，但会强烈抑制向支配膝关节运动肌肉的运动神经元的Ib类反射通路。这种抑制作用的中枢潜伏期非常短暂，表明来自足部的触觉皮肤传入神经与插入到向运动神经元的Ib类通路中的中间神经元具有少突触脊髓连接。相同的皮肤刺激并非都能改变来自小腿三头肌对比目鱼肌运动神经元的Ib类抑制。结合不同肌肉在人类运动中的作用对这些发现进行了讨论。有人提出，在足跟双足行走的站立阶段，向支配膝关节运动肌肉的运动神经元的Ib类反射通路的皮肤抑制作用，可能与前文所述的从踝关节到膝关节肌肉的强大Ia类连接共同发挥作用。
