Baizer J S, Desimone R, Ungerleider L G
Laboratory of Neuropsychology, National Institute of Mental Health, Bethesda, MD 20892.
Vis Neurosci. 1993 Jan-Feb;10(1):59-72. doi: 10.1017/s0952523800003229.
To investigate the subcortical connections of the object vision and spatial vision cortical processing pathways, we injected the inferior temporal and posterior parietal cortex of six Rhesus monkeys with retrograde or anterograde tracers. The temporal injections included area TE on the lateral surface of the hemisphere and adjacent portions of area TEO. The parietal injections covered the posterior bank of the intraparietal sulcus, including areas VIP and LIP. Our results indicate that several structures project to both the temporal and parietal cortex, including the medial and lateral pulvinar, claustrum, and nucleus basalis. However, the cells in both the pulvinar and claustrum that project to the two systems are mainly located in different parts of those structures, as are the terminals which arise from the temporal and parietal cortex. Likewise, the projections from the temporal and parietal cortex to the caudate nucleus and putamen are largely segregated. Finally, we found projections to the pons and superior colliculus from parietal but not temporal cortex, whereas we found the lateral basal and medial basal nuclei of the amygdala to be reciprocally connected with temporal but not parietal cortex. Thus, the results show that, like the cortical connections of the two visual processing systems, the subcortical connections are remarkably segregated.
为了研究物体视觉和空间视觉皮质处理通路的皮质下连接，我们向六只恒河猴的颞下回和顶叶后皮质注射了逆行或顺行示踪剂。颞叶注射部位包括半球外侧表面的TE区和相邻的TEO区部分。顶叶注射覆盖了顶内沟后壁，包括VIP区和LIP区。我们的结果表明，几个结构同时投射到颞叶和顶叶皮质，包括内侧和外侧丘脑枕、屏状核和基底核。然而，投射到这两个系统的丘脑枕和屏状核中的细胞主要位于这些结构的不同部位，从颞叶和顶叶皮质发出的终末也是如此。同样，从颞叶和顶叶皮质到尾状核和壳核的投射在很大程度上是分离的。最后，我们发现顶叶皮质而不是颞叶皮质有投射到脑桥和上丘，而我们发现杏仁核的外侧基底核和内侧基底核与颞叶皮质相互连接，与顶叶皮质没有连接。因此，结果表明，与两个视觉处理系统的皮质连接一样，皮质下连接也明显分离。
