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Can I read Functional Properties of Models for Direction Selectivity in the Retina on EtoBox?
Functional Properties of Models for Direction Selectivity in the Retina by Norberto M. Grzywacz; Christof Koch is a Neuroscience article available to read on EtoBox.
What is Functional Properties of Models for Direction Selectivity in the Retina about?
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; Adelson and Bergen: J. Opt. Soc. Am. [A], 2:284-299, 1985). This paper analyzes theoretically two nonlinear neural mechanisms that possibly underlie retinal direction selectivity and explores the conditions under which they behave as a quadratic nonlinearity. The first mechanism is shunting inhibition (Torre and Poggio: Proc. R. Soc. Lond. [Biol.], 202:409-416, 1978), and the second consists of the linear combination of the outputs of a depolarizing and a hyperpolarizing synapse, followed by a threshold operation. It was found that although sometimes possible, it is in practice hard to approximate the Shunting Inhibition and the Threshold models for direction selectivity by quadratic systems. For
Who reads Functional Properties of Models for Direction Selectivity in the Retina?
It is typically read by researchers, students, and practitioners in Neuroscience.
- Author
- Norberto M. Grzywacz; Christof Koch
- Publisher
- John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0887-4476)
- Published
- 1986
- Language
- EN
- Field
- Neuroscience (Life Sciences)