Proske U
Exp Brain Res. 1982;45(3):364-70. doi: 10.1007/BF01208596.
Responses of muscle spindles of the iliofibularis muscle of frog Litoria aurea have been recorded during single shock and repetitive stimulation of single functional motor axons. Repetitive stimulation of axons which innervated slow muscle, and on four occasions, axons which innervated twitch muscle, produced a large increase in the dynamic response of the spindle to a ramp-and-hold stretch. While extrafusal slow muscle did not respond to a single motor volley, some spindles did, especially if at the same time the muscle was being stretched. In an explanation of the effect of muscle stretch on responses of spindles to slow motor volleys it was proposed that stretch acted to reduce the internal motion in muscle fibres produced by a non-uniform distribution of sarcomere lengths. It was proposed that this kind of effect may account for dynamic fusimotor actions in all vertebrate spindles.
在对青蛙绿雨滨蛙的髂腓肌单根功能性运动轴突进行单次电击和重复刺激期间，已记录了该肌肉肌梭的反应。对支配慢肌的轴突进行重复刺激，以及在四种情况下对支配快肌的轴突进行重复刺激，均使肌梭对斜坡-保持拉伸的动态反应大幅增加。虽然肌外慢肌对单个运动冲动无反应，但一些肌梭有反应，尤其是在肌肉同时被拉伸时。在解释肌肉拉伸对肌梭对慢运动冲动反应的影响时，有人提出拉伸的作用是减少由肌节长度不均匀分布所产生的肌纤维内部运动。有人提出，这种效应可能解释了所有脊椎动物肌梭中的动态肌梭运动作用。
