Developmentof the
Visual System
Lettvin, J.Y., Maturana, H.R., McCulloch, W.S. & Pitts, W.H. (1959) What the frog's eye tells the frog's brain. Proceedings of the Institute of Radio Engineers, 47, 1940-1951.
Pomeranz, B. & Chung, S.H. (1970) Dendritic-tree anatomy codesform-vision physiology in tadpole retina . Science, 170, 983-984
Receptive FieldsRetina
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LGN
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V1
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a b c d e f g a b c d e f g baseball 1 0 0 0 0 0 1 1 0 0 0 0 0 0 hot dog 1 0 0 1 0 0 0 0 1 0 0 0 0 0 grandma 0 1 1 0 1 1 0 0 0 1 0 0 0 0 apple pie 0 0 0 1 0 0 0 0 0 0 1 0 0 0 football 0 0 0 0 1 0 0 0 0 0 0 1 0 0 soccer ball 1 0 1 1 1 1 1 0 0 0 0 0 1 0 tennis ball 1 1 0 0 0 0 1 0 0 0 0 0 0 1
AggregatePattern
FeatureDetection
a b c d e f g a b c d e f g baseball 1 0 0 0 0 0 1 1 0 0 0 0 0 0 hot dog 0 0 0 1 0 0 0 0 1 0 0 0 0 0 grandma 0 1 1 0 1 1 0 0 0 1 0 0 0 0 apple pie 0 0 0 1 0 0 0 0 0 0 1 0 0 0 football 0 0 0 0 1 0 0 0 0 0 0 1 0 0 soccer ball 1 0 1 1 1 1 0 0 0 0 0 1 0 tennis ball 1 1 0 0 0 0 1 0 0 0 0 0 0 1
AggregatePattern
FeatureDetection
How does this system come to be?
I.e., what role does stimulation play in its maturation?
1. induction
2. facilitation of rate
3. enhancement of ultimate level
4. maintenance
EnvironmentDependent
EnvironmentExpectant
Sur, Garraghty &Roe (1988) Science, 242, 1437-1441.
Sharma, J. Angelucci, A. & Sur, M. (2000) Induction of visual orientation modules in auditory cortex.Nature, 404, 841-847.
NOsynthase
NO
Guanylyl cyclasecGMP
Held, R. & Hein, A. (1963) Movement-produced stimulation in the development of visually –guided behavior. J. Comp. Physiol. Psych. 56, 872-876.
Tees, R.C., (1974) Effect of visual deprivation on development of depth perception in the rat. Journal of Comparative and Physiological Psychology, 86, 300-308.