Jahnke M T, Struppler A
Department of Neurology and Clinical Neurophysiology, Technical University of Munich, F.R.G.
Brain Res. 1990 May 7;515(1-2):181-6. doi: 10.1016/0006-8993(90)90594-2.
Discharge characteristics of muscle spindle primary afferents from human finger flexors were investigated during load-bearing isotonic position holding, and intentional shortening or lengthening contractions. During position holding, units mostly showed a negative relationship between muscle length and impulse rate, particularly when the load was small. When the load was increased, Ia-discharge rates increased more in the elongated than in the shortened muscle, and the inverse position response became less pronounced. During active lengthening contractions, a stretch response pattern was sometimes absent or could be abolished by increasing the load.
在承重等张姿势维持、主动缩短或主动延长收缩过程中，对人类手指屈肌肌梭初级传入纤维的放电特性进行了研究。在姿势维持过程中，神经元大多表现出肌肉长度与冲动频率之间呈负相关，尤其是在负荷较小时。当负荷增加时，拉长肌肉时Ia类纤维的放电频率比缩短肌肉时增加得更多，相反的姿势反应变得不那么明显。在主动延长收缩过程中，有时不存在牵张反应模式，或者通过增加负荷可以消除这种模式。
