What the Frog's Eye Tells the Frog's Brain

@article{Lettvin1959WhatTF,
  title={What the Frog's Eye Tells the Frog's Brain},
  author={Jerome Y. Lettvin and Humberto R. Maturana and Warren S. McCulloch and Walter Pitts},
  journal={Proceedings of the IRE},
  year={1959},
  volume={47},
  pages={1940-1951}
}
In this paper, we analyze the activity of single fibers in the optic nerve of a frog. Our method is to find what sort of stimulus causes the largest activity in one nerve fiber and then what is the exciting aspect of that stimulus such that variations in everything else cause little change in the response. It has been known for the past 20 years that each fiber is connected not to a few rods and cones in the retina but to very many over a fair area. Our results show that for the most part… 

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