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电镜下观察了猫肠系膜正常Ｐａｃｉｎｉ小体的结构及双侧切断内脏大神经后其中央轴突和邻近结构的变性改变。位于猫肠系膜Ｐａｃｉｎｉ小体内的主轴突由近侧包有髓鞘的终末前纤维及远侧的无髓终末部构成。含有较多囊泡、少囊泡或无囊泡的小型终末和轴突样结构包绕中央主轴突的无髓部及其突起的周围。双侧切断内脏大神经３～５ｄ后，中央主轴突发生明显的变性。与此同时，周围的含较多囊泡、少囊泡或无囊泡的小结构亦由于变性而消失。根据上述结果及以往的研究可以认为，这些小型终末和轴突样结构是随内脏大神经走行的交感节后传出成分，它们可能对猫肠系膜Ｐａｃｉｎｉ小体的感受性产生影响。
The morphological changes of the normal Pacini bodies in cat mesentery and the degeneration of the central axons and adjacent structures were observed under electron microscope. The main axons located in the cat’s mesentery Pacini bodies are composed of proximal myelinated end-pre-fibers and distal, non-myelinated termini. Small terminal and axonal-like structures, with more vesicles, fewer vesicles, or no vesicles, wrap around the unmyelinated portion of the central major axis and its protuberances. Bilateral cut off the visceral nerve 3 ~ 5d, the central spindle suddenly degeneration occurred. At the same time, the surrounding small structures with fewer vesicles, fewer vesicles, or no vesicles also disappear due to denaturation. Based on the above results and previous studies, we conclude that these small terminal and axon-like structures are the effector components of the sympathetic postganglionic nerve that travel along the visceral nerves and may have an impact on the susceptibility of the cat’s mesentery Pacini bodies.