Neurons on layer IV of the primate visual cortex undego changes in connections before and after birth leading to the formation of ocular dominance and orientational selective stripes. We model these changes by an intra-cortical interaction which can in turn be represented by a one-component (Ising-like) model for ocular dominance and a two-component (XY-like) model orientational selectivity. We study these systems numerically by Monte Carlo simulation and by solving Langevin equations. Both models give evidence of stripe, hexagonal, and paramagnetic phases. We discuss the relationship of these phases and of defect formation to experimental results from physiology.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.60481 |
| Date | January 1991 |
| Creators | Daviet, Philippe Marc Cyrille |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Physics.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001256859, proquestno: AAIMM72039, Theses scanned by UMI/ProQuest. |
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