Receptive Fields in Primate Retina: coordinated to sample visual space more uniformly. A study by Dr. E.J. Chichilnisky, Systems Neurobiology Laboratories at the Salk Institute, La Jolla, CA Presented by: Sarah-Nicole Bostan Psychology 159. Abstract.
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Receptive Fields in Primate Retina:coordinated to sample visual space more uniformly
A study by Dr. E.J. Chichilnisky, Systems Neurobiology Laboratories at the Salk Institute, La Jolla, CA
Presented by: Sarah-Nicole Bostan
smaller & more densely packed in periphery,
hence irregular shape of RF.
with an uninterrupted, high-resolution
visual representation, despite these
to magnocellular layers of lateral geniculate nucleus
retina, receives input from RGCs
signals to parvocellular layers of LGN, also
RED/GREEN color opponency (wave lengths)
To the left: how RGCs were formerly believed to work, their perfectly circular shape lent to a very pristine view of the “inner screen” idea.
(can sometimes be attributed to severe glaucoma)
among all 4 cell types!
53% improvement in visual area sampled in observed receptive field vs. scrambled RFs, suggesting that receptive fields are randomly individually formed, but exist at specific locations to provide optimal vision
“Trying to understand vision by studying only neurons is like trying to understand bird flight by studying only feathers; it just cannot be done.”
- David Marr, computational theorist, 1982.
Herman grid illusion, 1870.