Modeling and Simulation. III. Simulation of a Model for Development of Visual Cortical Specificity.
BROWN UNIV PROVIDENCE RI CENTER FOR NEURAL SCIENCE
Pagination or Media Count:
This document presents a tutorial describing aspects of the coding of computerized simulations of models of visual cortical development. The model considered has an anatomy of an excitatory projection from thalamus to cortex combined with intracortical inhibition. Cortical cells develop specificity to stimulus patterns in this model only when appropriate experience enables synaptic modification to organize the network. The simulation consists of a time loop. For each iteration of this loop, a stimulus is generated, the cortical response to this stimulus is computed, and synaptic weights are modified. The developing network is tested intermittently and the behavior of the system analyzed. Some of the details of the coding given include a method of describing rearing conditions, a convenient abstract form for the input stimuli, an iterative calculation of the intracortical feedback, a simple way to store synaptic strengths, and routines for performing the analysis. Keywords numerical methods and procedures plasticity.
- Anatomy and Physiology