Internal models for visual perception

Biol Cybern. 2003 May;88(5):409-17. doi: 10.1007/s00422-002-0387-1.

Abstract

Although the extrapolation of past perceptual history into the immediate and distant future is a fundamental phenomenon in everyday life, the underlying processing mechanisms are not well understood. A network model consisting of interacting excitatory and inhibitory cell populations coding for stimulus position is used to study the neuronal population response to a continuously moving stimulus. An adaptation mechanism is proposed that offers the possibility to control and modulate motion-induced extrapolation without changing the spatial interaction structure within the network. Using an occluder paradigm, functional advantages of an internally generated model of a moving stimulus are discussed. It is shown that the integration of such a model in processing leads to a faster and more reliable recognition of the input stream and allows for object permanence following occlusion. The modeling results are discussed in relation to recent experimental findings that show motion-induced extrapolation.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Neural Networks, Computer*
  • Neurons / physiology*
  • Visual Cortex / physiology*
  • Visual Perception / physiology*