DeVito J L
Exp Brain Res. 1978 Aug 15;32(4):581-90. doi: 10.1007/BF00239554.
Descending connections from parietal cortex to pulvinar in squirrel monkey were investigated with the autoradiographic method. Somatosensory areas I (SI) and II (SII) were found to project to the oral (PuO) and medial (PuM) subdivisions of the pulvinar. Projections from the posterior parietal region were recorded in circumscribed areas of PuM and the lateral (PuL) and inferior (PuI) subdivisions of pulvinar. Retrograde labeling with horseradish peroxidase (HRP) demonstrated that rostral parietal cortex including the lateral cortex of SI and the rostral part of area 5 received reciprocal projections from PuO and rostral PuM. Injections of HRP into medial and lateral regions of SI also resulted in labeled cells in PuO and PuM. Within the limitations of the HRP technique, the latter results suggest a direct pathway from pulvinar to primary sensory cortex. The experimental results confirm the accepted view of projections from parieto-temporo-occipital "association" cortex to PuM, PuL and PuI. In addition, reciprocal connections of rostral parietal cortex with PuO and PuM were demonstrated.
采用放射自显影法研究松鼠猴顶叶皮质至丘脑枕的下行联系。发现体感区I（SI）和II（SII）投射至丘脑枕的嘴侧（PuO）和内侧（PuM）亚区。顶叶后部区域的投射见于PuM的限定区域以及丘脑枕的外侧（PuL）和下部（PuI）亚区。用辣根过氧化物酶（HRP）进行逆行标记显示，包括SI外侧皮质和5区嘴侧部分的嘴侧顶叶皮质接受来自PuO和嘴侧PuM的相互投射。将HRP注入SI的内侧和外侧区域也导致PuO和PuM中有标记细胞。在HRP技术的局限性范围内，后一结果提示存在一条从丘脑枕至初级感觉皮质的直接通路。实验结果证实了关于顶叶 - 颞叶 - 枕叶“联合”皮质至PuM、PuL和PuI投射的公认观点。此外，还证实了嘴侧顶叶皮质与PuO和PuM之间的相互联系。
