Contribution of parasol-magnocellular pathway ganglion cells to foveal retina in macaque monkey

被引:6
|
作者
Ma, Ivan C. K. [1 ]
Nasir-Ahmad, Subha [1 ,2 ]
Lee, Sammy C. S. [1 ,2 ]
Grunert, Ulrike [1 ,2 ]
Martin, Paul R. [1 ,2 ]
机构
[1] Univ Sydney, Save Sight Inst & Discipline Ophthalmol, Fac Med & Hlth, Sydney, NSW 2000, Australia
[2] Univ Sydney, Australian Res Council Ctr Excellence Integrat Br, Sydney, NSW 2000, Australia
基金
澳大利亚研究理事会;
关键词
Primate; Retina; Parasol; Magnocellular; Visual Pathways; DENDRITIC FIELD SIZE; BIPOLAR CELLS; SPATIAL-RESOLUTION; WORLD MONKEY; AII-AMACRINE; MORPHOLOGY; DENSITY; TOPOGRAPHY; NEURONS; PROJECT;
D O I
10.1016/j.visres.2022.108154
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Parasol-magnocellular pathway ganglion cells form an important output stream of the primate retina and make a major contribution to visual motion detection. They are known to comprise ON and OFF type response polarities but the relative numbers of ON and OFF parasol cells, and the overall contribution of parasol cells to high-acuity foveal vision are not well understood. Here we use antibodies against carbonic anhydrase 8 (CA8) and intra-cellular injections of the liphilic dye DiI to show that CA8 selectively labels OFF parasol cells in macaque retina. By combined labeling with CA8 antibodies and a previously-described marker for parasol cells (GABAA receptor antibodies), we show that ON and OFF parasol cells each comprise -6% of all ganglion cells in central retina (each peak density -3000 cells/mm2 at 5 deg.), and each population comprises -10% of all ganglion cells in peripheral temporal retina. Thus, the spatial density of parasol cells in central retina is greater than reported by previous anatomical studies, and the central-peripheral gradient in parasol cell density is shallower than pre-viously reported. The data nevertheless predict decline in spatial acuity with visual field eccentricity for both midget-parvocellular pathway and parasol-magnocellular pathway mediated visual functions. The spatial resolving power of the OFF parasol array (peak -7 cpd) falls short of macaque behavioral grating acuity by at least a factor of three throughout the retina.
引用
收藏
页数:12
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