Abstract
THERE is no general answer to the question of the possible existence and function of a centrifugal pathway to the retina. Evidence for the presence of such a system in mammalian species is controversial, but Holden1 has pointed out that in the case of the pigeon there is substantial anatomical and physiological evidence for a centrifugal system. He goes on to suggest possible functions for such a pathway in mammals mediating known visual phenomena although Brindley2 has argued that there is little behavioural evidence for the necessity of such a pathway.
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References
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MICHAEL, J. Site of the Visual Suppression Effect. Nature 214, 1008 (1967). https://doi.org/10.1038/2141008a0
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DOI: https://doi.org/10.1038/2141008a0
