Following the transduction of light by the photoreceptors in the retina, information about stimulus color and fine detail is separated from information about gross form and movement. Information regarding these stimulus characteristics is then carried via parallel pathways through the magno and parvo cellular layers of the geniculate to the cortex where it is analyzed in separate areas. This article reviews the parallel and serial analysis of visual information in the brain, and provides clinical examples illustrating failures in the analysis process.
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