Borg J
J Neurol Neurosurg Psychiatry. 1983 Apr;46(4):317-21. doi: 10.1136/jnnp.46.4.317.
The slowing of the conduction of an impulse travelling in the relative refractory period of a prior impulse was studied in single short toe extensor motor units in man. Paired electrical stimuli were delivered to the peroneal nerve and single motor unit recordings were achieved by special electromyographic techniques. The delay of the second impulse, propagated during the relative refractory period of the prior impulse, limited the unit discharge, frequency. The shortest motor unit response interval ranged from 3 to 5 ms and was inversely related to the axonal conduction velocity. The delay of the second impulse in the proximal nerve segment was most pronounced close to the stimulus point but continued during propagation for several milliseconds. Further delay occurred distally. The slowing of the conduction of the second impulse after delivering paired electrical nerve stimuli offers a new parameter in single motor unit studies and also makes it possible to measure the axonal refractory period after electrical nerve excitation without using blocking nerve impulses.
在人体单个短趾伸肌运动单位中，研究了在前一个冲动的相对不应期内传导的冲动传导减慢的情况。将成对的电刺激施加到腓神经，并通过特殊的肌电图技术记录单个运动单位。在前一个冲动的相对不应期内传播的第二个冲动的延迟，限制了单位放电频率。最短的运动单位反应间隔为3至5毫秒，且与轴突传导速度呈负相关。第二个冲动在近端神经节段的延迟在刺激点附近最为明显，但在传播过程中会持续数毫秒。在更远端还会出现进一步的延迟。施加成对的电神经刺激后第二个冲动传导的减慢为单个运动单位研究提供了一个新参数，并且还使得在不使用阻断神经冲动的情况下测量电神经兴奋后的轴突不应期成为可能。
