Wada N
Department of Physiology, School of Medicine Chiba University, Japan.
Arch Ital Biol. 1991 Sep;129(4):289-94.
The effects of group II muscle (PBSt, GS) and cutaneous afferent (Sur, SPc, Tib) inputs from the hindlimb on the monosynaptic reflexes of motoneurons innervating tail muscles were studied in lower spinalized cats. Stimulation of the cutaneous nerves at the conditioning-test stimulus interval of about 10-20 ms facilitated and inhibited the monosynaptic reflexes of ipsilateral and contralateral tail muscles, respectively. The effects of the muscle nerve stimulation were not so prominent as those elicited by cutaneous nerve stimulation. The monosynaptic reflex was also inhibited by muscle nerve stimulation at 10-50 ms intervals. The effects of conditioning stimulation of the hindlimb peripheral nerves at short intervals were depressed or blocked by section of the ipsilateral lateral funiculus at S1 spinal segment. These findings show that the neuronal pathway from hindlimb afferents to tail muscle motoneurons passed the lateral funiculus of the spinal cord and modulates the motoneuronal activity of tail muscles.
在低位脊髓横断的猫中，研究了后肢Ⅱ类肌肉（PBSt、GS）和皮肤传入神经（Sur、SPc、Tib）输入对支配尾部肌肉的运动神经元单突触反射的影响。在约10 - 20毫秒的条件 - 测试刺激间隔下刺激皮肤神经，分别促进和抑制同侧和对侧尾部肌肉的单突触反射。肌肉神经刺激的效果不如皮肤神经刺激所引发的效果显著。肌肉神经在10 - 50毫秒间隔刺激时，单突触反射也受到抑制。在S1脊髓节段切断同侧外侧索，可抑制或阻断后肢周围神经在短间隔的条件刺激效应。这些发现表明，从后肢传入神经到尾部肌肉运动神经元的神经通路经过脊髓外侧索，并调节尾部肌肉的运动神经元活动。
