Do superior colliculus projection zones in the inferior pulvinar project to MT in primates?
Do superior colliculus projection zones in the inferior pulvinar project to MT in primates?
复制标题
DOI：
10.1046/j.1460-9568.1999.00461.x
复制
发表时间：
1999-02-01
影响因子：
3.4
通讯作者：
Kaas, JH
中科院分区：
文献类型：
--
作者：
Stepniewska, I;Qi, HX;Kaas, JH
为了确定上级丘输入与投射到中颞视觉区（MT）的丘脑神经元的关系，将与辣根过氧化物酶结合的麦胚凝集素注射到三只猫头鹰猴的上级丘中，并在MT中注射固蓝。标记终末和神经元在后丘脑的位置与下枕的四个结构不同的核团有关（Stepniewska & Kaas，维斯. Neurosci. 14，第1043 -1060页，1997）。在MT中注射FastBlue标记的神经元主要位于下枕内侧核。在毗邻的下枕中央内侧核、外侧枕核和外侧膝状体背侧核内也有少量标记神经元。上级丘的传入在下丘枕的后核和内侧核最为密集。有稀疏的输入到中央外侧核的下枕，位置在外侧和内侧枕，和背外侧膝状体核。结果表明，下枕内侧核，MT的主要投射区，没有收到显着的输入从上级丘。
In order to determine the relationship of superior colliculus inputs to thalamic neurons projecting to the middle temporal visual area (MT), injections of wheat germ agglutinin conjugated with horseradish peroxidase were placed in the superior colliculus of three owl monkeys, with injections of Fast Blue in the MT. The locations of labelled terminals and neurons in the posterior thalamus were related to four architectonically distinct nuclei of the inferior pulvinar (Stepniewska & Kaas, Vis. Neurosci. 14, pp.1043-1060, 1997). Fast Blue injections in the MT labelled neurons largely in the medial nucleus of the inferior pulvinar. A few labelled neurons were found in the adjoining central medial nucleus of the inferior pulvinar, as well as in the lateral pulvinar and the dorsal lateral geniculate nucleus. Superior colliculus inputs were most dense in the posterior and medial nuclei of the inferior pulvinar. There were sparser inputs to the central lateral nucleus of the inferior pulvinar, locations in the lateral and medial pulvinar, and the dorsal lateral geniculate nucleus. The results indicate that the medial nucleus of the inferior pulvinar, the major projection zone to the MT, does not receive a significant input from the superior colliculus.