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Levels of modeling of mechanisms of visually guided behavior

Published online by Cambridge University Press:  04 February 2010

Michael A. Arbib
Michael A. Arbib
Affiliation:
Departments of Computer Science, Neurobiology, Physiology, and Biomedical Engineering, University of Southern California, Los Angeles, Calif. 90089
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Abstract

Intermediate constructs are required as bridges between complex behaviors and realistic models of neural circuitry. For cognitive scientists in general, schemas are the appropriate functional units; brain theorists can work with neural layers as units intermediate between structures subserving schemas and small neural circuits.

After an account of different levels of analysis, we describe visuomotor coordination in terms of perceptual schemas and motor schemas. The interest of schemas to cognitive science in general is illustrated with the example of perceptual schemas in high-level vision and motor schemas in the control of dextrous hands.

Rana computatrix, the computational frog, is introduced to show how one constructs an evolving set of model families to mediate flexible cooperation between theory and experiment. Rana computatrix may be able to do for the study of the organizational principles of neural circuitry what Aplysia has done for the study of subcellular mechanisms of learning. Approach, avoidance, and detour behavior in frogs and toads are analyzed in terms of interacting schemas. Facilitation and prey recognition are implemented as tectal-pretectal interactions, with the tectum modeled by an array of tectal columns. We show how layered neural computation enters into models of stereopsis and how depth schemas may involve the interaction of accommodation and binocular cues in anurans.

Keywords

cognitioncomputationcooperativeconnectionism frogsmotor patternsneural modelingneuroethologyprey recognitionschemasstereopsistectum
Type
Target article
Information
Behavioral and Brain Sciences , Volume 10 , Issue 3 , September 1987 , pp. 407 - 436
Copyright
Copyright © Cambridge University Press 1987

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