大鼠终纹床核区的垂体后叶投射细胞

POSTERIOR PITUITARY PROJECTING NEURONS IN THE BED NUCLEI OF THE STRIA TERMINALIS IN THE RAT

在大鼠垂体后叶内注入霍乱毒素结合辣根过氧化物酶后,在终纹床核群区发现一些逆行标记细胞。根据最近对于终纹床核群的细胞构筑学的研究,本文分析了其逆行标记细胞的分布。在终纹床核群的前腹区内,在纹旁核内有少量树突,核周有少量细胞;有一些散在的大细胞核神经元;腹侧核内也有一些标记细胞。在终纹床核群后部的背侧半附近,有若干比较明显的标记细胞群,包括前穹窿核、内侧背副细胞群、外侧背副细胞群及室间孔下群。这些细胞群紧靠终纹床核群,却难以归入终纹床核群本身。但其树突往往伸入至终纹床核后部的主核或束间核内,与终纹床核具有共同的传入来源。还有少量细胞非恒定地散在于终纹床核群各处。

After injecting the posterior pituitery of the albino rats with cholera-toxin conjugated HRP,retrogradely labeled neurons were found in the area of the bed nuclei of the stria terminalis (BST),which were then analyzed,based on the recent cytoarchitectonical study of the BST.In the anterior subdivision of the BST dendrites could be seen in the parastrial nucleus with a few labeled cells surround- ing it;cells of the magnocellular nucleus were found scattered in the subdivision; some labeled cells were also identified in the ventral nucleus.Surrounding the dor- sal half of the posterior division of the BST there were several fairly distinct labe- led cell groups,viz.,the anterior fornical nucleus,medial and lateral dorsal accessory groups,and the subinterventricular group.Though these cell groups are contiguous with the BST,they do not seem to belong to the BST itself,but their dendrites often extend into the posterior division of the BST,thus sharing some common afferents with the latter.A few less constant cells were sometimes seen scattered in various parts of the BST.