Functional Organization of the Visual System
The visual system must convert the pattern of light that falls on the retina into perceptions. This involves a transformation of the visual image in several dimensions. Take, for example, depth perception. There are several cues to depth perception, including disparity, vergence, perspective, shading, texture gradients, interposition, motion parallax, size, and accommodation. For a complete perception, all of these must be analyzed. Where some cues conflict with others (see Kaufman, 1974), the system must resolve the conflicts and come to a decision. Where the cues agree with each other, the system produces a perception of the distance of an object from the subject, its position in relation to other objects nearby, and the three-dimensional shape of the object.
KeywordsGanglion Cell Visual Cortex Receptive Field Superior Colliculus Bipolar Cell
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- Cleland, B. G., and Levick, W. R., 1974, Properties of rarely encountered types of ganglion cells in the cat’s retina and an overall classification, J. Physiol. (London) 240: 457–492.Google Scholar
- De Monasterio, F. M., and Gouras, P., 1975, Functional properties of ganglion cells of the rhesus monkey retina, J. Physiol. (London) 251:167–195.Google Scholar
- Enroth-Cugell, C., and Robson, J. G., 1966, The contrast sensitivity of retinal ganglion cells of the cat, J. Physiol. (London) 187:517–552.Google Scholar
- Hubel, D. H., and Wiesel, T. N., 1962, Receptive fields, binocular interaction and functional architecture in cat’s visual cortex, J. Physiol. (London) 160:106–154.Google Scholar
- Kaufman, L., 1974, Sight and Mind, Oxford University Press, London.Google Scholar
- Movshon, J. A., Adelson, E. H., Gizzi, M. S., and Newsome, W. T., 1985, The analysis of moving visual patterns, in: Pattern Recognition Mechanisms (C. Chaga, R. Gattass, and C. Gross, eds.), Pontifical Academy of Sciences, Vatican City, pp. 117–151.Google Scholar
- Polyak, S. L., 1941, The Retina, University of Chicago Press, Chicago.Google Scholar
- Rosenquist, A., 1985, Connections of visual cortical areas in the cat, in: Cerebral Cortex (A. Peters and E. G. Jones, eds.), Plenum Press, New York, pp. 81–117.Google Scholar
- Zeki, S. M., 1978, Uniformity and diversity of structure and function in rhesus monkey prestriate visual cortex, J. Physiol. (London) 277:273–290.Google Scholar