Summary
Cats reared with their visual world restricted to vertical lines for one eye and horizontal lines for the other had, in their visual cortices, units with elongated receptive fields that were either vertically or horizontally oriented. These receptive fields could be mapped only using that eye which had seen lines of the same orientation during development. Other units had diffuse, unresponsive receptive fields (Hirsch and Spinelli, 1970). Six cats, from the group above, were revived and allowed normal binocular viewing in an attempt to determine the possibility and extent of adding other types of receptive fields by giving other experiences to their visual systems. After exposure to a normal environment for up to 19 months it was found that indeed there had been a massive increase in the percentage of those classes of receptive fields that were either absent or weak at the end of the selective visual experience. Significantly, these receptive fields, acquired during binocular viewing, were very often binocular.
The results, however, show that units whose response characteristics mimic the stimuli viewed during development were almost completely unaffected by normal binocular visual experience, i. e., they were monocularly activated and had the orientation appropriate for the stimuli viewed by the eye from which they could be mapped. Most impressive are a few units whose receptive field shape is almost a carbon copy of the pattern viewed during development. The data provide evidence that visual experience has a direct continuing and lasting effect on the functional connectivity of cells in the visual cortex.
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Spinelli, D.N., Hirsch, H.V.B., Phelps, R.W. et al. Visual experience as a determinant of the response characteristics of cortical receptive fields in cats. Exp Brain Res 15, 289–304 (1972). https://doi.org/10.1007/BF00235913
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DOI: https://doi.org/10.1007/BF00235913