Functional properties of models for direction selectivity in the retina.

@article{Grzywacz1987FunctionalPO,
  title={Functional properties of models for direction selectivity in the retina.},
  author={Norberto M. Grzywacz and Christof Koch},
  journal={Synapse},
  year={1987},
  volume={1 5},
  pages={417-34}
}
Poggio and Reichardt (Kybernetik, 13:223-227, 1973) showed that if the average response of a visual system to a moving stimulus is directionally selective, then this sensitivity must be mediated by a nonlinear operation. In particular, it has been proposed that at the behavioral level, motion-sensitive biological systems are implemented by quadratic nonlinearities (Hassenstein and Reichardt: Z. Naturforsch., 11b:513-524, 1956; van Santen and Sperling: J. Opt. Soc. Am. [A] 1:451-473, 1984… CONTINUE READING

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