Olavarria J, Montero V
Department of Neurophysiology, University of Wisconsin, Madison 53705.
Neurosci Res. 1990 Apr;8(1):40-7. doi: 10.1016/0168-0102(90)90055-j.
We have studied the organization of visual cortex in the hamster by analyzing and correlating the distributions of callosal and striate-extrastriate connections. Our results show that, in lateral extrastriate cortex, callosal connections form an elaborate pattern which delineates at least 3 regions poor in callosal connections. These regions receive projections from striate cortex which are distributed into multiple separate fields. Two additional striate-projection fields were observed in medial extrastriate cortex, and another field was often observed near the posterolateral border of primary somatosensory cortex. All striate recipient fields are reciprocally connected with striate cortex. The patterns of callosal and striate-extrastriate connections in the hamster are similar, although not identical, to the corresponding patterns in rats and mice. Our results provide evidence that the organization of visual cortex in the hamster is highly elaborate, and suggest that extrastriate cortex is subdivided into multiple visual areas.
我们通过分析胼胝体和纹状-纹外连接的分布并进行关联，研究了仓鼠视觉皮层的组织结构。我们的结果表明，在外侧纹外皮层中，胼胝体连接形成了一种精细的模式，勾勒出至少3个胼胝体连接较少的区域。这些区域接收来自纹状皮层的投射，这些投射分布在多个独立的区域。在内侧纹外皮层中观察到另外两个纹状投射区域，并且经常在初级体感皮层的后外侧边界附近观察到另一个区域。所有纹状接受区域都与纹状皮层相互连接。仓鼠中胼胝体和纹状-纹外连接的模式与大鼠和小鼠中的相应模式相似，尽管不完全相同。我们的结果提供了证据，证明仓鼠视觉皮层的组织结构高度精细，并表明纹外皮层被细分为多个视觉区域。
