CYTOLOGY OF PERIOLIVARY CELLS AND THE ORGANIZATION OF THEIR PROJECTIONS IN THE CAT
CYTOLOGY OF PERIOLIVARY CELLS AND THE ORGANIZATION OF THEIR PROJECTIONS IN THE CAT
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DOI：
10.1002/cne.902150304
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发表时间：
1983-01-01
影响因子：
2.5
通讯作者：
ADAMS, JC
中科院分区：
文献类型：
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作者：
ADAMS, JC
用辣根过氧化物酶或荧光示踪剂分别向耳蜗、耳蜗核和下丘内注射，研究了位于上级橄榄主核附近的细胞的投射。至少有2个不同的细胞学类的橄榄周细胞被发现项目的每一个这些结构。标记大、小橄榄耳蜗细胞。发现它们的细胞学和位置如先前所述。一些橄榄耳蜗细胞也投射到耳蜗核。投射到耳蜗核的其他主要橄榄周细胞类别包括外侧组多极细胞，其成员位于同侧外侧上级橄榄周围，并具有粗糙的深色尼氏物质。投射到耳蜗核的另一类主要的橄榄周细胞是斜方体腹侧核的小细胞。该细胞的特征在于其大小和仅1或2个强烈染色的尼氏物质团块。这些细胞从两侧投射到耳蜗核。投射到下丘的橄榄周细胞包括内侧群和外侧群。侧群细胞从两侧突出。这些细胞呈多极状，含有淡染的絮状尼氏物质。它们主要位于外侧上级橄榄体的腹侧。内侧组的突出主要是同侧的，并且从内侧区域到内侧上级橄榄体。细胞为多极细胞，含有聚集的尼氏物质。它们通常位于大的橄榄耳蜗细胞附近，它们类似于尼氏材料，但与后者在Protargol材料中的区别在于具有环形轴体末梢。这6类橄榄周细胞的外观和位置使我们有可能在非实验材料中识别它们，并有信心地推断它们的投射是什么。这些结果显示了这些以前很少了解的结构的相当大的组织。
Projections of cells located near principal nuclei of the superior olive, periolivary cells, were studied by injecting horseradish peroxidase or fluorescent tracers into the chochlea, cochlear nucleus and inferior colliculus. At least 2 distinct cytological classes of periolivary cells were found to project to each of these structures. Large and small olivocochlear cells were labeled. Their cytology and locations were found to be as was previously described. Some olivocochlear cells also project to the cochlear nucleus. Other major periolivary cell classes that project to the cochlear nucleus include a lateral group of multipolar cells whose members are located around the ipsilateral lateral superior olive and have coarse, darkly staining Nissl substance. The other major periolivary cell class that projects to the cochlear nucleus is the small cell of the ventral nucleus of the trapezoid body. This cell is characterized by its size and by only 1 or 2 intensely staining clumps of Nissl substance. Projections of these cells to the cochlear nucleus is from both sides. Periolivary cells that project to the inferior colliculus include medial and lateral groups. Cells of the lateral group project from both sides. These cells are multipolar in shape and contain lightly staining, flocculent Nissl substance. They are predominantly located immediately ventral to the lateral superior olive. Projections from the medial group are predominantly ipsilateral and arise from the region medial to the medial superior olive. The cells are multipolar and contain clumped Nissl substance. They often lie near large olivocochlear cells, which they resemble in Nissl material but are distinguished from the latter in Protargol material by having ring-type axosomatic endings. The appearance and locations of these 6 classes of periolivary cells make it possible to recognize them in nonexperimental material and to infer with confidence what their projections are. These results show considerable organization of these previously little understood structures.