Boussaoud D, Desimone R, Ungerleider L G
Laboratory of Neuropsychology, National Institute of Mental Health, Bethesda, MD 20892.
Vis Neurosci. 1992 Sep-Oct;9(3-4):291-302. doi: 10.1017/s0952523800010701.
To examine the subcortical connections of the medial superior temporal and fundus of the superior temporal visual areas (MST and FST, respectively), we injected anterograde and retrograde tracers into 16 physiologically identified sites within the two areas in seven macaque monkeys. The subcortical connections of MST and FST were found to be very similar. Both areas were found to be reciprocally connected with the pulvinar, mainly with its medial subdivision, and with the claustrum. Nonreciprocal projections from both MST and FST were consistently found in the striatum (caudate and putamen), reticular nucleus of the thalamus, and the pontine nuclei. The labeled terminals in the pons were in the dorsolateral, lateral, dorsal, and peduncular nuclei. Additional nonreciprocal projections were found in one MST and one FST case to the nucleus of the optic tract, and, in one FST case, to the lateral terminal nucleus. Finally, three cases showed a nonreciprocal projection to FST from the basal forebrain. The subcortical structures containing label following MST and FST injections were largely the same as those labeled after injections of the middle temporal visual area (MT), but the label within each structure after MST and FST injections was more widespread than that from MT, overlapping the distribution of label that has been reported after injections of parietal visual areas. This finding is consistent with the known contributions of MST and FST to the functions of parietal cortex, such as eye-movement control.
为了研究内侧颞上视觉区和颞上视觉区底部（分别为MST和FST）的皮质下连接，我们将顺行和逆行示踪剂注入7只猕猴这两个区域内16个经生理学鉴定的部位。发现MST和FST的皮质下连接非常相似。发现这两个区域都与丘脑枕相互连接，主要是与其中间细分区域连接，并且与屏状核相互连接。在纹状体（尾状核和壳核）、丘脑网状核和脑桥核中始终发现来自MST和FST的非相互投射。脑桥中标记的终末位于背外侧核、外侧核、背核和脑桥核。在1例MST和1例FST病例中发现向视束核的额外非相互投射，并且在1例FST病例中发现向外侧终末核的投射。最后，3例显示从基底前脑向FST的非相互投射。注射MST和FST后含有标记的皮质下结构与注射颞中视觉区（MT）后标记的结构基本相同，但MST和FST注射后每个结构内的标记比MT注射后的更广泛，与顶叶视觉区注射后报道的标记分布重叠。这一发现与MST和FST对顶叶皮质功能（如眼球运动控制）的已知贡献一致。
