THE LAMINAR DISTRIBUTION OF CORTICAL CONNECTIONS WITH THE TECTO-RECIPIENT AND CORTICO-RECIPIENT ZONES IN THE CATS LATERAL POSTERIOR NUCLEUS
THE LAMINAR DISTRIBUTION OF CORTICAL CONNECTIONS WITH THE TECTO-RECIPIENT AND CORTICO-RECIPIENT ZONES IN THE CATS LATERAL POSTERIOR NUCLEUS
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DOI：
10.1016/0306-4522(85)90125-3
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发表时间：
1985-01-01
期刊：
影响因子：
3.3
通讯作者：
CHALUPA, LM
中科院分区：
文献类型：
--
作者：
ABRAMSON, BP;CHALUPA, LM
用辣根过氧化物酶标记的麦胚凝集素的顺行和逆行运输方法，观察了与构成猫S外侧后核的两个视区的皮质联系的层状组织。在后外侧核的内侧部，示踪剂沉积到主要的顶盖接受区，显示了与下列皮质区域的相互联系：19区和21a区，视上中沟的内侧和外侧岸，视上外侧沟的背侧和腹侧岸，对应于视上外侧背侧区和视上外侧腹侧视区，以及后上丘底的一个区域。在每一个皮质区域，有两个不同的细胞群被标记：VI层的小锥体神经元和V层的大锥体细胞。在这些回填的细胞上有两条顺行标记带，I层有一条窄带，IV层中心有一条宽带。小麦胚芽凝集素与辣根过氧化物酶结合沉积在外侧后核外侧的纹状受体区，在17，18，19，20a和b，21a区，鞍上沟中部的内侧和外岸，后上沟和脾沟的底部形成皮质标记。在除17和18以外的所有皮质区域，LABEL的板层分布与示踪剂沉积到后外侧核的内侧部后的分布相同。相反，17区和18区的回填细胞仅限于第V层，顺行标记仅限于第I层。接受外侧膝状体背侧核A层的直接投射的皮质区域明显地维持着与膝外膝状体视丘脑的相互联系的明显的层状组织。皮质的所有其他视觉区域与外侧后核的顶盖和纹状接受区都有一个共同的相互联系模式。
The anterograde and retrograde transport of wheat germ agglutinin conjugated to horseradish peroxidase was used to examine the laminar organization of cortical connections with the 2 visual zones that comprise the cat''s lateral posterior nucleus. Microelectrophoretic deposits of the tracer into the principal tecto-recipient zone in the medial division of the lateral posterior nucleus revealed reciprocal connections with the following cortical fields: areas 19 and 21a, the medial and lateral banks of the middle suprasylvian sulcus, and the dorsal and ventral banks of the lateral suprasylvian sulcus, which correspond to the dorsal lateral suprasylvian and ventral lateral suprasylvian visual areas and an area in the fundus of the posterior suprasylvian sulcus. In each of these cortical areas, 2 distinct populations of cells were labeled: small pyramidal neurons in layer VI and large pyramidal cells in layer V. Overlying these backfilled cells were 2 bands of anterograde label, a narrow strip in layer I and a wide band centered in layer IV. Deposits of wheat germ agglutinin conjugated to horseradish peroxidase confined to the striate-recipient zone in the lateral portion of the lateral posterior nucleus resulted in cortical label in areas 17, 18, 19, 20a and b, 21a, the medial and lateral banks of the middle suprasylvian sulcus, the posterior suprasylvian sulcus and in the fundus of the splenial sulcus. In all cortical areas other than 17 and 18, the laminar distribution of label was the same as that found after deposits of the tracer into the medial division of the lateral posterior nucleus. In contrast, areas 17 and 18 contained backfilled cells that were confined to layer V and anterograde label that was restricted to layer I. The cortical areas that receive a direct projection from the A laminae of the dorsal lateral geniculate nucleus evidently maintain a distinct laminar organization of reciprocal connections with the extrageniculate visual thalamus. All other visual areas of the cortex share a common pattern of reciprocal connections with both the tecto- and striate-recipient zones of the lateral posterior nucleus.