VISUOTOPIC ORGANIZATION OF THE LATERAL SUPRASYLVIAN AREA AND OF AN ADJACENT AREA OF THE ECTOSYLVIAN GYRUS OF CAT CORTEX - A PHYSIOLOGICAL AND CONNECTIONAL STUDY
VISUOTOPIC ORGANIZATION OF THE LATERAL SUPRASYLVIAN AREA AND OF AN ADJACENT AREA OF THE ECTOSYLVIAN GYRUS OF CAT CORTEX - A PHYSIOLOGICAL AND CONNECTIONAL STUDY
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DOI：
10.1017/s0952523800006568
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发表时间：
1991-04-01
影响因子：
1.9
通讯作者：
SHIPP, S
中科院分区：
文献类型：
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作者：
GRANT, S;SHIPP, S
我们通过电生理测绘探索了猫大脑皮层中侧裂上沟 (MSS) 周围区域的视觉组织，并使用麦芽凝集素辣根过氧化物酶 (WGA-HRP) 追踪其皮质和皮质下连接的地形。 两种方法的观察结果是一致的，并证实了 MSS 中存在两个独立的视觉区域，它们与 Palmer 等人的后内侧和后外侧外侧上侧 (PMLS、PLLS) 区域的位置和内部组织近似但并不完全对应。 (1978)。我们将 MSS 的内侧岸和外侧岸的尾端上的区域定义为外侧外侧上 (LS) 区域的一部分，该区域接收来自代表下视觉象限的 17 区区域的地形组织投影。 该区域与本身为条纹接收器的其他结构（皮质区域 18 和 19，以及外侧后核 (LPl) 的外侧部分）相连，并与接收直接视网膜输入的各种核相连，例如 LGd 的 C 层、内侧层间核 (MIN) 和上丘 (SC) 的浅层。 它与 LPl、LGd、MIN 和 SC 的连接在地形上与区域 17 的输入相对应。区域 LS 的修订地图是根据生理和连接数据生成的：其吻侧边界由较低视觉高度的表示形成，水平子午线在尾部表示，其横向边界由垂直子午线形成； LS 区域与尾端侧岸的视觉区域共享注视中心的表示。相邻的侧岸区域具有比 LS 区域更大的感受野，并且连接性也截然不同。 它不接收来自区域 17 的输入，也几乎不接收来自纹状体接收结构（包括 LS 区）的输入，而是连接到更遥远的纹外视觉区域，例如岛叶皮质中的前外裂视觉 (AEV) 区域，以及接受顶盖输入的丘脑区域（LPm 和外侧内侧-上膝状核复合体）。 根据两种绘图方法，侧岸区域包含上视觉象限和下视觉象限的表示，但视觉顺序的程度相当有限。 我们将其称为后侧外侧视觉 (PEV) 区域，因为它似乎在功能上和连接上与 LS 区域分离，但可能是 AEV 区域的功能前身。
We have explored the visuotopic organization of the territory surrounding the middle suprasylvian sulcus (MSS) of cat cerebral cortex by electrophysiological mapping, and by tracing the topography of its cortical and subcortical connections using wheatgerm-agglutinin horseradish peroxidase (WGA-HRP). Observations from the two approaches were concordant, and confirmed the presence of two separate visual areas in the MSS that approximate, but do not exactly correspond, to the location and internal organization of the posterior medial and posterior lateral lateral suprasylvian (PMLS, PLLS) areas of Palmer et al. (1978).We define as part of the lateral suprasylvian (LS) area the territory on the medial bank and caudal end of the lateral bank of the MSS that receives a topographically organized projection from the region of area 17 representing the lower visual quadrant. This territory is connected with other structures that are themselves striate-recipient (cortical areas 18 and 19, and the lateral division of the lateral posterior (LPl) nucleus), and with a variety of nuclei that receive direct retinal input, such as the C-laminae of the LGd, the medial interlaminar nucleus (MIN), and the superficial layers of the superior colliculus (SC). Its connections with the LPl, LGd, MIN, and SC correspond topographically with the input from area 17. Revised maps of area LS were produced from the physiological and connectional data: its rostral border is formed by a representation of lower visual elevations with the horizontal meridian represented caudally, and its lateral border is formed by the vertical meridian; area LS shares a representation of the center of gaze with the visual area of the lateral bank at its caudal end.The adjacent lateral bank area has larger receptive fields than area LS, and very different connectivity. It receives no input from area 17 and little input from striate-recipient structures, including area LS, but instead is connected to more remote extrastriate visual areas, such as the anterior ectosylvian visual (AEV) area in insular cortex, and to zones of the thalamus in receipt of tectal input (LPm and the lateromedial-suprageniculate nuclear complex). According to both mapping approaches, the lateral bank area contains representations of both the upper and lower visual quadrants but a rather limited degree of visuotopic order. We refer to it as the posterior ectosylvian visual (PEV) area, because it appears to be functionally and connectionally dissociated from area LS, but is possibly a functional antecedent of area AEV.