Nerve Fiber Synapses on Spiral Ganglion Cells in the Human Cochlea
Nerve Fiber Synapses on Spiral Ganglion Cells in the Human Cochlea
复制标题
人类耳蜗螺旋神经节细胞上的神经纤维突触
DOI：
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发表时间：
1979
期刊：
影响因子：
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通讯作者：
Tadahiko Takahashi
中科院分区：
文献类型：
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作者：
R. Kimura;C. Y. Ota;Tadahiko Takahashi
在人耳蜗有髓和无髓螺旋神经节细胞上观察到神经纤维突触。神经纤维穿过成鞘卫星细胞与髓鞘连接处，并部分内陷于胞体周围，形成轴体突触。一个小的有髓神经元与神经纤维突触显示多极细胞过程。然而，大多数具有相同超微结构特征的小神经元没有显示这些突触。在小神经元的树突状突起上以及离小神经元一定距离的曲张神经与无髓神经纤维之间也可见轴树突触。虽然这些观察结果在某些方面符合耳蜗中副交感神经纤维和神经元的概念，但它们也与小神经元可能具有受来自橄榄耳蜗束的传出纤维的突触接触影响的听觉功能的想法相一致。
Nerve fiber synapses were observed on the small myelinated and unmyelinated spiral ganglion cells of the human cochlea. The nerve fibers penetrated the junctions of the ensheathing satellite cells and myelin lamellae, and partly invaginated into the perikarya to establish axosomatic synapses. One small myelinated neuron with a nerve fiber synapse demonstrated multipolar cell processes. However, most small neurons with identical ultrastructural characteristics did not show these synapses. Axodendritic synapses were also seen on the dendritic processes of the small neurons and between varicose nerves and unmyelinated nerve fibers some distance from the small neurons. While these observations conform in some aspects with the concept of parasympathetic nerve fibers and neurons in the cochlea, they are also compatible with the idea that the small neurons may have an auditory function influenced by the synaptic contacts of efferent fibers from the olivocochlear bundle.