Caccia M R, McComas A J, Upton A R, Blogg T
J Neurol Neurosurg Psychiatry. 1973 Dec;36(6):960-77. doi: 10.1136/jnnp.36.6.960.
A study has been made of the responses of motoneurones innervating small muscles of the hand to electrical and mechanical stimulation of the skin. Both excitatory and inhibitory effects could be observed in the same muscle after a single stimulus to a given area of skin. The earliest excitatory and inhibitory responses are probably mediated by group III and the smaller group II afferent nerve fibres. A later inhibition results from activity in the larger group II fibres which are connected to cutaneous mechanoreceptors, especially those in the tips of the fingers and thumb. This late inhibitory reflex may operate through the fusimotor system. The possible roles of these reflexes are discussed in relation to previous investigations in man and the cat.
一项关于支配手部小肌肉的运动神经元对皮肤电刺激和机械刺激反应的研究已经展开。对给定皮肤区域进行单次刺激后,在同一块肌肉中既能观察到兴奋效应,也能观察到抑制效应。最早的兴奋和抑制反应可能由Ⅲ类以及较细的Ⅱ类传入神经纤维介导。后来的抑制是由与皮肤机械感受器相连的较粗的Ⅱ类纤维的活动引起的,尤其是手指尖和拇指处的那些感受器。这种晚期抑制性反射可能通过肌梭运动系统起作用。结合之前对人类和猫的研究,讨论了这些反射可能发挥的作用。