Vedel J P
Exp Brain Res. 1975;22(2):113-28.
Effects of repetitive stimulation of the contralateral caudate nucleus on the static discharge and dynamic sensitivity of soleus muscle spindle primary and secondary endings were studied in cats anaesthetized with Halothane (Fluothane). By progressive increasing the depth of anaesthesia two different fusimotor effects could be observed. 1. A static facilitatory effect; under light anaesthesia the static discharge of primary and secondary endings were strongly increased. The response of the primary endings to phasic stretch of the muscle was generaly decreased. 2. A depressant effect; under deep anaesthesia the static discharge of primary and secondary endings were decreased. The dynamic sensitivity of the primary endings was lightly increased or remained unaltered. The ventro-lateral part of the caudate nucleus is mainly responsible for these effects; Caudate nucleus fusimotor effects were compared with those induced by gamma dynamic and gamma static fibers stimulations.
在氟烷麻醉的猫身上，研究了对侧尾状核重复刺激对比目鱼肌肌梭初级和次级末梢的静态放电及动态敏感性的影响。通过逐步加深麻醉深度，可以观察到两种不同的梭外肌运动效应。1. 静态易化效应；在浅麻醉下，初级和次级末梢的静态放电显著增加。初级末梢对肌肉相位性牵张的反应通常降低。2. 抑制效应；在深麻醉下，初级和次级末梢的静态放电减少。初级末梢的动态敏感性轻度增加或保持不变。尾状核的腹外侧部分主要负责这些效应；将尾状核的梭外肌运动效应与γ动态和γ静态纤维刺激所诱导的效应进行了比较。
