Sorenson K M, Rodman H R
Department of Psychology, Emory University, Atlanta, GA 30322, USA.
Neurosci Lett. 1996 Oct 11;217(1):5-8. doi: 10.1016/0304-3940(96)13052-4.
We sought to determine if there are any direct projections from the dorsal lateral geniculate nucleus (dLGN) to visual cortical area TE in either adult or infant primates. To do so, we examined labelling in the thalamus of eight macaque monkeys which received injections of the retrograde tracer cholera toxin-B subunit within TE. Four of these cases were infants in which the injections revealed transient patterns of inputs to TE from various other brain regions. Although each monkey showed extensive label in the pulvinar nucleus and other subcortical structures, none showed unambiguous labelling in the dLGN. The absence of direct connections between the dLGN and area TE indicates that rudimentary color and form processing capacities in the absence of striate cortex must utilize other pathways even when damage to striate cortex takes place early in life.
我们试图确定在成年或幼年灵长类动物中，是否存在从背外侧膝状核（dLGN）到视觉皮层区域TE的直接投射。为此，我们检查了八只猕猴丘脑的标记情况，这些猕猴在TE区域接受了逆行示踪剂霍乱毒素B亚基的注射。其中四个案例是幼猴，注射显示了来自其他不同脑区到TE的短暂输入模式。尽管每只猴子在丘脑枕核和其他皮层下结构中都显示出广泛的标记，但在dLGN中均未显示出明确的标记。dLGN与TE区域之间缺乏直接连接表明，即使在生命早期发生纹状皮层损伤，在没有纹状皮层的情况下，基本的颜色和形状处理能力也必须利用其他通路。
