VISUAL TOPOGRAPHY OF AREA TEO IN THE MACAQUE
VISUAL TOPOGRAPHY OF AREA TEO IN THE MACAQUE
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DOI：
10.1002/cne.903060403
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发表时间：
1991-04-22
影响因子：
2.5
通讯作者：
UNGERLEIDER, LG
中科院分区：
文献类型：
--
作者：
BOUSSAOUD, D;DESIMONE, R;UNGERLEIDER, LG
以前的研究已经绘制了视觉区域的视觉组织图，从枕叶皮质的V1到V4，以及颞叶皮质的TE区域，但位于枕颞交界处的介于两者之间的皮质仍然相对未被探索。为了确定该区域的视觉组织，在5只猕猴的腹枕叶和颞叶皮质的370个穿透部位上，在1200个视觉反应部位绘制了感受野图。我们确定了一个新的视觉区域，大致对应于细胞构造区Teo，位于V4腹侧部分和TE区之间。TEO的感受野大小介于V4和TE之间，视觉组织较粗糙。总体而言，TEO的感受野似乎覆盖了几乎整个对侧视野。TEO的中心凹和副中央凹位于颞下回的凸面，外周野位于大脑半球腹面的内侧，位于枕颞沟内和内侧。在Teo的内侧边界之外，在细胞构造区Tf内，是另一个视觉响应区，我们称之为VTF；这个区域也可能有一些原始的视觉地形图。TEO的恒定偏心带与V2、V3v和V4的偏心带似乎是连续的。TEO的上场表示与腹侧V4的上场表示相邻，水平子午线的表示构成了这两个区域之间的边界。TEO中的下场表示正好位于上场的前面，但较小。与TEO中偏心率的有序表示相比，我们发现除了上下场的分离外，极角几乎没有一致的表示。在两只动物身上注射解剖示踪剂的结果表明，Teo是将视觉信息从V1传递到下颞叶皮质的重要环节。因此，TEO很可能在图形知觉中起重要作用。
Previous studies have mapped the visuotopic organization of visual areas from V1 through V4 in the occipital cortex and of area TE in the temporal cortex, but the cortex in between, at the occipito-temporal junction, has remained relatively unexplored. To determine the visuotopic organization of this region, receptive fields were mapped at 1,200 visually responsive sites on 370 penetrations in the ventral occipital and temporal cortex of five macaques. We identified a new visual area, roughly corresponding to cytoarchitectonic area TEO, located between the ventral portion of V4 and area TE. Receptive fields in TEO are intermediate in size between those in V4 and TE and have a coarse visuotopic organization. Collectively, receptive fields in TEO appear to cover nearly the entire contralateral visual field. The foveal and parafoveal representation of TEO is located laterally on the convexity of the inferior temporal gyrus, and the peripheral field is represented medially on the ventral surface of the hemisphere, within and medial to the occipitotemporal sulcus. Beyond the medial border of TEO, within cyteoarchitectonic area TF, is another visually responsive region, which we have termed VTF; this region may also have some crude visual topography. Bands of constant eccentricity in TEO appear to be continuous with those in V2,V3v, and V4. The upper field representation in TEO is located adjacent to that in ventral V4, with a representation of the horizontal meridian forming the boundary between the two areas. The lower field representation in TEO is located just anterior to the upper field but is smaller. In contrast to the orderly representation of eccentricity in TEO, we found little consistent representation of polar angle, other than the separation of upper and lower fields. The results of injecting anatomical tracers in two animals suggest that TEO is an important link in the pathway that relays visual information from V1 to the inferior temporal cortex. TEO is thus likely to play an important role in pattern perception.