Accession Number : ADA304169

Title :   Synaptic Plasticity in Visual Cortex. From Synaptic Properties to Membranes and Receptors.

Descriptive Note : Final rept.,

Corporate Author : BROWN UNIV PROVIDENCE RI INST FOR BRAIN AND NEURAL SYSTEMS

Personal Author(s) : Cooper, Leon N.

PDF Url : ADA304169

Report Date : 31 OCT 1995

Pagination or Media Count : 12

Abstract : We have realistically modeled the two-eye visual environment. We study how orientation selectivity and ocular dominance form simultaneously. In particular, we study the effect of image misalignment between the two eyes on receptive field formation. We have compared how image misalignment affects receptive fields under two different learning rules PCA in the form proposed by Oja in 1982 and BCM. We have chosen to examine these two because they are well defined and have stable fixed points. We have shown that binocular misalignment has very different effects on these two learning rules. For the BCM learning rule misalignment is sufficient to produce varying degrees of ocular dominance, whereas for the PCA learning rule binocular neurons will emerge independent of the misalignment.

Descriptors :   *MISALIGNMENT, *VISUAL CORTEX, *BINOCULARS, IMAGES, PLASTIC PROPERTIES, MEMBRANES, EYE, ENVIRONMENTAL PROTECTION, SYNAPSE, LEARNING.

Subject Categories : Anatomy and Physiology
      Optical Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE