Sincich Lawrence C, Horton Jonathan C
Beckman Vision Center, University of California, San Francisco, San Francisco, CA 94143-0730, USA.
Science. 2002 Mar 1;295(5560):1734-7. doi: 10.1126/science.1067902.
Current models partition the primate visual system into dorsal (magno) and ventral (parvo, konio) streams. Perhaps the strongest evidence for this idea has come from the pattern of projections between the primary visual area (V1) and the second visual area (V2). Prior studies describe three distinct pathways: magno to thick stripes, parvo to pale stripes, and konio to thin stripes. We now demonstrate that V1 output arises from just two sources: patch columns and interpatch columns. Patch columns project to thin stripes and interpatch columns project to pale and thick stripes. Projection of interpatches to common V2 stripe types (pale and thick) merges parvo and magno inputs, making it likely that these functional channels are distributed strongly to both dorsal and ventral streams.
当前的模型将灵长类动物视觉系统划分为背侧（大细胞）和腹侧（小细胞、侏儒细胞）通路。或许支持这一观点的最有力证据来自于初级视觉区（V1）和次级视觉区（V2）之间的投射模式。先前的研究描述了三条不同的通路：大细胞通路至粗条纹区，小细胞通路至淡条纹区，以及侏儒细胞通路至细条纹区。我们现在证明，V1的输出仅来自两个来源：斑块柱和斑块间柱。斑块柱投射至细条纹区，而斑块间柱投射至淡条纹区和粗条纹区。斑块间区域向常见的V2条纹类型（淡条纹和粗条纹）的投射合并了小细胞和大细胞的输入，这使得这些功能通道很可能同时大量分布于背侧和腹侧通路。
