Nakano K, Tokushige A, Kohno M, Hasegawa Y, Kayahara T, Sasaki K
Department of Anatomy, School of Medicine, Mie University, Japan.
Neurosci Res. 1992 Mar;13(2):119-37. doi: 10.1016/0168-0102(92)90093-r.
The special areal and laminar distributions of cortical afferent connections from various thalamic nuclei in the monkey (Macaca fuscata) were studied by using the anterograde axonal transport technique of autoradiography. The following findings were obtained. The superficial thalamocortical (T-C) projections, terminating in the (superficial half of) cortical layer I, arise mainly from the nucleus ventralis anterior, pars principalis (VApc) and nucleus ventralis lateralis, pars oralis (VLo), and possibly from the nucleus ventralis lateralis, pars medialis (VLm) and nucleus ventralis anterior, pars magnocellularis (VAmc). The VApc gives rise to the superficial T-C and deep T-C projections onto the postarcuate premotor area around the arcuate genu and spur, and onto the dorsomedial part of the caudal premotor area as well as the supplementary motor area (SMA). The VApc also gives rise to only deep T-C projections onto the remaining premotor area and onto the rostral bank of the arcuate sulcus as well as the ventral bank of the cingulate sulcus at the level of the premotor area. The VLo gives rise to the superficial T-C projections onto the ventrolateral part of the motor area (mainly to the forelimb motor area) and onto the dorsomedial part to the mesial cortex at the rostral level of the motor area. The VAmc gives rise to the superficial T-C projections onto the banks of the arcuate genu and adjacent region of area 8. Area X, the nucleus ventralis posterolateralis, pars oralis (VPLo), nucleus ventralis posterolateralis, pars caudalis (VPLc), nucleus ventralis posteromedialis (VPM) and possibly the nucleus ventralis lateralis, pars caudalis (VLc) send only deep T-C projections. The dorsal and medial parts of the VLc project onto the premotor area, the rostral part of the motor area and the SMA, and also the ventral bank of the cingulate sulcus. Area X projects onto the premotor area, the SMA, and the caudal part of area 8. The thalamic relay nuclei projecting onto the frontal association cortex were found to be the VAmc, medial VLc and area X.
运用放射自显影顺行轴突运输技术，对猕猴（食蟹猴）中来自不同丘脑核的皮质传入连接的特殊区域和分层分布进行了研究。获得了以下结果。终止于皮质第I层（浅层一半）的丘脑皮质（T-C）浅层投射主要起源于腹前核主部（VApc）和腹外侧核嘴侧部（VLo），也可能起源于腹外侧核内侧部（VLm）和腹前核大细胞部（VAmc）。VApc产生丘脑皮质浅层和深层投射，投射到弓状膝和弓状棘周围的弓状后运动前区，以及尾侧运动前区的背内侧部分和辅助运动区（SMA）。VApc还仅产生丘脑皮质深层投射到其余运动前区、弓状沟的嘴侧缘以及运动前区水平的扣带沟腹侧缘。VLo产生丘脑皮质浅层投射到运动区的腹外侧部分（主要到前肢运动区）以及运动区嘴侧水平的内侧皮质的背内侧部分。VAmc产生丘脑皮质浅层投射到弓状膝的边缘和8区的相邻区域。X区、腹后外侧核嘴侧部（VPLo）、腹后外侧核尾侧部（VPLc）、腹后内侧核（VPM）以及可能的腹外侧核尾侧部（VLc）仅发出丘脑皮质深层投射。VLc的背侧和内侧部分投射到运动前区、运动区的嘴侧部分和SMA，以及扣带沟的腹侧缘。X区投射到运动前区、SMA和8区的尾侧部分。发现投射到额叶联合皮质的丘脑中继核是VAmc、内侧VLc和X区。
