Zalkind V I
Neurosci Behav Physiol. 1984 Jul-Aug;14(4):318-26. doi: 10.1007/BF01149618.
The regularity of receptor discharges of passive muscle spindles adapted to a different length of the triceps of the calf of narcotized cats was investigated in the range of average frequencies from 5.6 to 40 impulses/sec. The values of the coefficients of variation of the impulse intervals in discharges of the primary endings are distributed in the range from 2.5 to 18.0% and of the secondary from 1.2 to 12%. The discharges of the primary endings are less variable than the discharges of the primary. Among the latter are found receptors with less, moderately, and more regular discharges at any length of the muscle. The shape of the "average impulse interval vs. coefficient of variation" relationship is nonlinear and differs for different units. For samples of receptors having approximately the same variability of the impulse intervals the average values of the coefficients of variation decrease significantly with muscle tension and increase of the rate of impulse flow. In some cases a decrease of the values of the coefficients of variation occurs due to a decrease of the dispersion at the same rate of flow and in other cases both parameters change simultaneously. A decrease of the dispersion of the intervals in receptor discharges apparently reflects an increase of the number of uniformly depolarized endings as their tension increases.
在5.6至40次冲动/秒的平均频率范围内，研究了麻醉猫小腿三头肌被动肌梭感受器放电的规律性，该肌梭适应于不同的长度。初级终末放电冲动间隔的变异系数值分布在2.5%至18.0%范围内，次级终末的变异系数值分布在1.2%至12%范围内。初级终末的放电比次级终末的放电变异性小。在次级终末中，发现在肌肉的任何长度下，都有放电规律性较低、中等和较高的感受器。“平均冲动间隔与变异系数”关系的形状是非线性的，并且不同单位有所不同。对于冲动间隔变异性大致相同的感受器样本，变异系数的平均值随着肌肉张力和冲动发放率的增加而显著降低。在某些情况下，变异系数值的降低是由于在相同发放率下离散度的降低，而在其他情况下，两个参数同时变化。感受器放电间隔离散度的降低显然反映了随着张力增加，均匀去极化终末数量的增加。
