High-Resolution Mapping of Anatomical Connections in Marmoset Extrastriate Cortex Reveals a Complete Representation of the Visual Field Bordering Dorsal V2

被引:17
|
作者
Jeffs, Janelle [1 ,2 ]
Federer, Frederick [1 ,3 ]
Ichida, Jennifer M. [1 ]
Angelucci, Alessandra [1 ]
机构
[1] Moran Eye Ctr, Dept Ophthalmol, Salt Lake City, UT 84132 USA
[2] Univ Utah, Dept Bioengn, Salt Lake City, UT 84132 USA
[3] Univ Utah, Neurosci Program, Salt Lake City, UT 84132 USA
基金
美国国家卫生研究院; 美国国家科学基金会;
关键词
area DA; corticocortical connections; dorsomedial area; primate; ventrolateral posterior area; WORLD OWL MONKEYS; MACAQUE MONKEY; CORTICAL CONNECTIONS; CALLITHRIX-JACCHUS; CHOLERA-TOXIN; FUNCTIONAL-ORGANIZATION; VISUOTOPIC ORGANIZATION; AREA V3; PRESTRIATE CORTEX; AOTUS-TRIVIRGATUS;
D O I
10.1093/cercor/bhs088
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
The primate visual cortex consists of many areas. The posterior areas (V1, V2, V3, and middle temporal) are thought to be common to all primate species. However, the organization of cortex immediately anterior to area V2 (the "third tier" cortex) remains controversial, particularly in New World primates. The main point of contention has been whether the third tier cortex consists of a single area V3, representing lower and upper visual quadrants in dorsal and ventral cortex, respectively, or of 2 distinct areas (the dorsomedial [DM] area and a V3-like area). Resolving this controversy is crucial to understand the function and evolution of the third tier cortex. We have addressed this issue in marmosets, by performing high-precision mapping of corticocortical connections in cortex bordering dorsal V2. Multiple closely spaced neuroanatomical tracer injections were placed across the full width of dorsal V2 or adjacent anterior cortex, and the location of resulting labeled cells mapped throughout whole flattened visual cortex. The resulting topographic patterns of labeled connections allowed us to define areas and their boundaries. We found that a complete representation of the visual field borders dorsal V2 and that the third tier cortex consists of 2 distinct areas. These results unequivocally support the DM model.
引用
收藏
页码:1126 / 1147
页数:22
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