Emergent Orientation Selectivity from Random Networks in Mouse Visual Cortex

• Autores: Pattadkal, Jagruti J.; Mato, German; van Vreeswijk, Carl; Priebe, Nicholas J.; Hansel, David
• Año de publicación: 2018
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: BALANCE OF EXCITATION AND INHIBITION; CONDUCTANCE-BASED MODELING; ORIENTATION SELECTIVITY; RECURRENT NEURONAL NETWORKS; VISUAL CORTEX
• Institución: Consejo Nacional de Investigaciones Científicas y Técnicas

The connectivity principles underlying the emergence of orientation selectivity in primary visual cortex (V1) of mammals lacking an orientation map (such as rodents and lagomorphs) are poorly understood. We present a computational model in which random connectivity gives rise to orientation selectivity that matches experimental observations. The model predicts that mouse V1 neurons should exhibit intricate receptive fields in the two-dimensional frequency domain, causing a shift in orientation preferences with spatial frequency. We find evidence for these features in mouse V1 using calcium imaging and intracellular whole-cell recordings. Pattadkal et al. show that orientation selectivity can emerge from random connectivity, and offer a distinct perspective for how computations occur in the neocortex. They propose that a random convergence of inputs can provide signals for orientation preference in contrast with the dominant model that requires a precise arrangement.
Fil: Pattadkal, Jagruti J.. University of Texas at Austin; Estados Unidos
Fil: Mato, German. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: van Vreeswijk, Carl. Centre National de la Recherche Scientifique; Francia
Fil: Priebe, Nicholas J.. University of Texas at Austin; Estados Unidos
Fil: Hansel, David. Centre National de la Recherche Scientifique; Francia