Tachibana T, Fujiwara N, Nawa T
Department of Oral Anatomy, Iwate Medical University School of Dentistry, Morioka, Japan.
Arch Histol Cytol. 1990 May;53(2):147-56. doi: 10.1679/aohc.53.147.
A ganglionated nerve plexus (GNP) found in the nasal vestibular mucosa of the adult musk shrew, and most likely belonging to the nervus terminalis, was studied by electron microscopy. The GNP, which contained ganglion cells and both myelinated and unmyelinated nerve fibers, was located in the subepithelial layer of the mesial vestibular mucosa of the snout processes. The ganglion cells were characterized by an eccentrically located round nucleus, dispersed mitochondria and Golgi apparatuses, and many small vesicles. Nissl bodies were rare. The ganglion cells, solitary or in a small group, were entirely covered with satellite cell sheaths. Semiserial sections suggested that a given ganglion cell directly extends one nerve process and plural modified cilia. There were no synaptic contacts between the ganglion cells and efferent nerve elements. On the other hand, it was seen that the epithelium overlying the GNP contained many nerve terminals which probably originated from the GNP. It is suggested that the ganglion cells in the nasal vestibular GNP of the musk shrew represent primary sensory neurons.
利用电子显微镜对成年麝鼩鼻前庭黏膜中发现的神经节状神经丛（GNP）进行了研究，该神经丛很可能属于终神经。GNP包含神经节细胞以及有髓和无髓神经纤维，位于吻突内侧前庭黏膜的上皮下层。神经节细胞的特征是细胞核呈圆形且偏位，线粒体和高尔基体分散，还有许多小泡。尼氏体很少见。神经节细胞单个或成小群存在，完全被卫星细胞鞘覆盖。半连续切片显示，单个神经节细胞直接伸出一个神经突起和多个修饰的纤毛。神经节细胞与传出神经元件之间没有突触联系。另一方面，可以看到覆盖在GNP上的上皮含有许多可能起源于GNP的神经末梢。提示麝鼩鼻前庭GNP中的神经节细胞代表初级感觉神经元。
