CORTICAL AREAS WITHIN THE LATERAL SULCUS CONNECTED TO CUTANEOUS REPRESENTATIONS IN AREA-3B AND AREA-1 - A REVISED INTERPRETATION OF THE 2ND SOMATOSENSORY AREA IN MACAQUE MONKEYS
CORTICAL AREAS WITHIN THE LATERAL SULCUS CONNECTED TO CUTANEOUS REPRESENTATIONS IN AREA-3B AND AREA-1 - A REVISED INTERPRETATION OF THE 2ND SOMATOSENSORY AREA IN MACAQUE MONKEYS
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DOI：
10.1002/cne.903550405
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发表时间：
1995-05-15
影响因子：
2.5
通讯作者：
ALLOWAY, K
中科院分区：
文献类型：
--
作者：
BURTON, H;FABRI, M;ALLOWAY, K
在18只猕猴中，观察了3b区和1区的各种身体表征与侧顶叶皮质之间的联系。我们将示踪剂（固蓝、二脒基黄、辣根过氧化物酶和罗丹明葡聚糖）单独或组合注射到密切相关的皮肤反应部位，例如，相邻的数字。在所有注射部位的顶骨盖和顶骨上发现了分离的标记斑块。根据细胞构筑标准，标记的区域包括第二躯体感觉区（SII）、岛后区（Ri）和颗粒区（IG）。假设连接是同伦从生理上确定的身体表示在初级躯体感觉皮层，标记模式SII包括完整的前部和后部的身体地图。身体的方向是直立在后方和仰卧在前面的SII区。区域3b与前SII的连接密度更大。标测图是沿远端四肢沿着对齐的镜像。“SII区”的前后（A-P）长度超过7 mm;它在冠状面上从外侧沟底部延伸到顶内沟前端附近的表面皮质。两个额外的地形组织地图可能在里。这些是沿着A-P轴定向的“蠕虫状”身体贴图，并在头部表示处连接。与IG中心的连接不是躯体定位组织的。参考之前对猴子SII的映射，讨论了标记连接所揭示的侧顶叶皮质体感区的多样性，并与其他物种该皮质区域多个区域的报道进行了比较。(C)1995年Wiley-Liss，Inc.
Cortical connections between various body representations in areas 3b and 1 and lateral parietal cortex were examined in 18 macaque monkeys. We injected tracers (Fast Blue, Diamidino Yellow, Horseradish Peroxidase, and Rhodamine Dextran), alone or in combination, into closely related cutaneous responsive sites, e.g., adjacent digits. Separated patches of labeling were found across the parietal operculum and insula for all injected locations. On the basis of cytoarchitectural criteria, the labeled regions include the second somatosensory area (SII), retroinsular area (Ri) and granular insula (Ig). Assuming the connections are homotopical from physiologically identified body representations in primary somatosensory cortex, the labeling patterns in SII include complete anterior and posterior body maps. The orientation of the body is erect in the posterior and supine in the anterior SII region. Area 3b has greater density of connections with anterior SII. The maps are mirror images aligned along the distal extremities. The anterior-posterior (A-P) length of the ''SII region'' exceeds 7 mm; it extends in the coronal plane from the fundus of the lateral sulcus to surface cortex near the anterior tip of the intraparietal sulcus. Two additional topographically organized maps are likely in Ri. These are ''worm-like'' body maps oriented along the A-P axis and joined at the head representation. Connections with the center of Ig are not somatotopically organized.The diversity of somatosensory areas in lateral parietal cortex revealed by the labeled connections was discussed in reference to prior mapping of SII in monkeys and was compared to reports of multiple areas in this region of cortex in other species. (C) 1995 Wiley-Liss, Inc.