Zalkind V I
Fiziol Zh SSSR Im I M Sechenova. 1981 May;67(5):752-9.
In 75 primary endings of passive muscle spindles with high dynamic sensitivity, static thresholds, position sensitivity and discharge regularity were studied on stepwise stretching of the m. triceps surde in anesthetized cats. Receptors with more regular discharges revealed low static thresholds, high static responses, monotonously rising curve "the length of muscle -- the mean firing rate" and oftener displays of spontaneous activity. Receptors with less regular discharges revealed high static thresholds and low static responses; the probability of mean firing rate increment for each "step" of muscle stretching is rather small in them. Low dispersion of interspike intervals seems to characterize is rather small in them. Low dispersion of interspike intervals seems to characterize discharges of those primary endings whose large terminal branch makes contact mainly with the chain intrafusal fibers.
在75个具有高动态敏感性的被动肌梭的初级终末中，通过对麻醉猫的小腿三头肌进行逐步拉伸，研究了其静态阈值、位置敏感性和放电规律性。放电更规律的感受器表现出低静态阈值、高静态反应、“肌肉长度-平均放电频率”曲线单调上升以及更频繁的自发活动表现。放电不太规律的感受器表现出高静态阈值和低静态反应；在它们中，肌肉拉伸每“步”平均放电频率增加的概率相当小。峰间间隔的低离散度似乎是那些大终末分支主要与链状肌梭内纤维接触的初级终末放电的特征。
