Functional streams in occipito-frontal connections in the monkey
Functional streams in occipito-frontal connections in the monkey
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DOI：
10.1016/0166-4328(95)00182-4
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发表时间：
1996-04-01
影响因子：
2.7
通讯作者：
Morel, A
中科院分区：
文献类型：
--
作者：
Bullier, J;Schall, JD;Morel, A
已知，投射到顶叶皮质的唇区和颞叶皮质的Teo和TE区的纹前皮质区域大多是分开的。因此，可以区分来自枕叶皮质的两种不同的信息流。我们希望确定顶叶和颞叶在向额叶皮质的投射中是否仍然是分离的。在顶叶和颞叶皮质或额叶视野(FEF)的外侧和内侧部分配对注射逆行荧光示踪剂。在二维图像中重建含有逆行标记细胞的皮质区域。结果表明，颞叶皮质主要投射到外侧FEF区(45区)。顶叶皮质向内侧FEF(8a区)、外侧FEF和46区发出投射。因此，顶叶和颞叶的血流在侧方的FEF汇合。大多数枕区投射到内侧FEF的区域与投射到顶叶皮质的区域相同，而外侧FEF接受来自枕区的传入神经与投射到颞叶皮质的区域相同。因此，可以区分两个互连的网络。一种与颞下皮质有关，包括颞叶上沟腹侧缘和底部、外侧前额叶和腹侧纹前叶皮质。这个网络强调中心视觉、小扫视和形式识别。另一个网络与顶内沟的皮质相连。它由STS的上岸和底部、内侧前额叶和纹前背侧皮质组成。这些区域编码周边视野，在大眼跳时活跃。
It is known that the prestriate cortical regions that project to area LIP in parietal cortex and to areas TEO and TE in temporal cortex are mostly separated. Two separate streams of information transfer from occipital cortex can thus be distinguished. We wished to determine whether the parietal and temporal streams remain segregated in their projections to frontal cortex. Paired injections of retrograde fluorescent tracers were placed in parietal and temporal cortex, or in the lateral and medial parts of the frontal eye field (FEF). The cortical regions containing retrogradely labeled cells were reconstructed in two-dimensional maps. The results show that temporal cortex mainly projects to lateral FEF (area 45). Parietal cortex sends projections to medial FEF (area 8a) and to lateral FEF, as well as to area 46. Thus, the parietal and temporal streams converge in lateral FEF. Most of the occipital regions projecting to medial FEF are the same as those projecting to parietal cortex, whereas lateral FEF receives afferents from the same occipital regions as those sending projections to temporal cortex. Thus, one can distinguish two interconnected networks. One is associated with the inferotemporal cortex and includes areas of the ventral bank and fundus of the superior temporal sulcus (STS), lateral FEF and ventral prestriate cortex. This network emphasizes central vision, small saccades and form recognition. The other network is linked to cortex of the intraparietal sulcus. It consists of areas of the upper bank and fundus of STS, medial FEF and dorsal prestriate cortex. These areas encode peripheral visual field and are active during large saccades.