Beck P D, Kaas J H
Department of Psychology, Vanderbilt University, Nashville, Tennessee 37240, USA.
J Comp Neurol. 1998 Jul 6;396(3):381-98.
The dorsomedial visual area (DM) of owl monkeys is a cortical area that has been described recently in a range of primate species. To study the thalamic connections of this area, injections of several distinguishable neuroanatomical tracers were placed into DM in galagos, owl monkeys, squirrel monkeys, and macaque monkeys. The distribution of label was remarkably consistent across these diverse primate species. Labeled connections were densest within the pulvinar complex. Both the lateral and inferior divisions of the pulvinar, but not the medial division, had connections with DM. Within the inferior pulvinar of monkeys, central lateral and central medial nuclei had dense connections, and the medial and posterior nuclei had sparse connections with DM. Sparser connections were revealed in the lateral geniculate nucleus and the nucleus limitans. Anterograde label was also found in the superior colliculus. The consistencies in the pattern of subcortical projections across prosimian primates, New World monkeys, and Old World monkeys support the concept that DM is a visual area common to all primates. In addition, these results provide further evidence for proposed subdivisions of the inferior pulvinar.
夜猴的背内侧视觉区（DM）是最近在一系列灵长类物种中被描述的一个皮质区域。为了研究该区域的丘脑连接，将几种可区分的神经解剖示踪剂注射到婴猴、夜猴、松鼠猴和猕猴的DM区。在这些不同的灵长类物种中，标记物的分布非常一致。标记的连接在丘脑枕复合体中最为密集。丘脑枕的外侧和下部分与DM有连接，而内侧部分没有。在猴的下丘脑枕内，中央外侧核和中央内侧核与DM有密集连接，内侧核和后核与DM的连接稀疏。外侧膝状体核和界核中的连接较稀疏。在上丘中也发现了顺行标记。原猴亚目灵长类动物、新大陆猴和旧大陆猴的皮质下投射模式的一致性支持了DM是所有灵长类动物共有的视觉区域这一概念。此外，这些结果为下丘脑枕的提议细分提供了进一步的证据。
