Subcortical projections of six visual cortical areas in the owl monkey, Aotus trivirgatus
Subcortical projections of six visual cortical areas in the owl monkey, Aotus trivirgatus
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猫头鹰猴 Aotus trivirgatus 六个视觉皮层区域的皮层下投影
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发表时间：
1979
期刊：
影响因子：
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通讯作者：
J. Kaas
中科院分区：
文献类型：
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作者：
J. Graham;C.‐S. Lin;J. Kaas
用放射自显影方法研究了三弗吉尼亚猫（Aotus trivirgatus）6个视皮层区（17区、18区、中颞区、背内侧区和后顶叶区）的皮质下投射。未显示对侧投射。虽然一些脑干结构接受来自所有六个皮质分区的输入，但每个皮质区域似乎都表现出自己独特的皮质下投射模式。所有6个皮质区均投射到丘脑枕的上级和下分区、丘脑网状核、顶盖前区和上级丘。一个或多个视觉皮质区域的其他皮质下靶点是基底神经节、屏状体、齿状回、一个或多个板内核、外侧后核、前膝状体核、背外侧膝状体核和脑桥核。此外，离皮质投射到背外侧膝状体核，顶盖前和上级丘的细节不同的皮质区研究。向网状核、前膝状体核、外侧膝状体背核、枕上级区和部分上级丘的投射呈拓扑结构。皮质下的预测的目标进行了比较与视网膜，所揭示的放射自显影方法氚化脯氨酸注射后的眼睛，并发现重叠在不同程度上的上级丘，pretectum和背外侧膝状体核和被隔离在前膝状体核。这些结果证实了以前在猫头鹰猴中的研究的有效性，这些研究表明视觉皮层被细分为几个功能不同的区域，并说明了离皮层对视觉处理的影响的复杂性。
Subcortical projections of six visual cortical areas (Areas 17 and 18, the Middle Temporal, Dorsomedial and Medial Areas, and the Posterior Parietal Region) in the owl monkey, Aotus trivirgatus, were investigated with autoradiographic methods following injections of tritiated proline. No contralateral projections were demonstrated. While some brainstem structures received input from all six subdivisions of cortex, each cortical area appeared to exhibit its own unique pattern of subcortical projections. All six cortical areas were found to project to the superior and inferior divisions of the pulvinar, reticular nucleus of the thalamus, pretectum and superior colliculus. Other subcortical targets of one or more visual cortical areas were the basal ganglia, claustrum, zona incerta, one or more of the intralaminar nuclei, lateral posterior nucleus, pregeniculate nucleus, dorsal lateral geniculate nucleus, and pontine nuclei. Furthermore, details of corticofugal projections to the dorsal lateral geniculate nucleus, pretectum and superior colliculus varied with the cortical area studied. The projections to the reticular nucleus, pregeniculate nucleus, dorsal lateral geniculate nucleus, the inferior and a portion of the superior division of the pulvinar and the superior colliculus were found to be topographically organized. The targets of the subcortical projections were compared with those of the retina, as revealed by autoradiographic methods following tritiated proline injections of the eye and were found to overlap to varying extents in the superior colliculus, pretectum and dorsal lateral geniculate nucleus and to be segregated in the pregeniculate nucleus. The results substantiate the validity of previous studies in the owl monkey that suggest that the visual cortex is subdivided into several functionally distinct areas and illustrate the complexity of corticofugal influence on visual processing.