Grossberg, StephenMingolla, EnnioRoss, William2011-11-142011-11-141996-06https://hdl.handle.net/2144/2317How the brain generates visual percepts is a central problem in neuroscience. We propose a detailed neural model of how LGN and the interblob cortical stream through V1 and V2 generate context-sensitive perceptual groupings from visual inputs. The model suggests a functional role for cortical layers, columns, maps, and networks and proposes homologous circuits for V1 and V2 with larger scale processing in V2. An integrated treatment of interlaminar, horizontal, orientational, and endstopping cortical interactions and a role for corticogeniculate feedback in grouping are proposed. Modeled circuits simulate parametric psychophysical data about boundary grouping and illusory contour formation.en-USCopyright 1996 Boston University. Permission to copy without fee all or part of this material is granted provided that: 1. The copies are not made or distributed for direct commercial advantage; 2. the report title, author, document number, and release date appear, and notice is given that copying is by permission of BOSTON UNIVERSITY TRUSTEES. To copy otherwise, or to republish, requires a fee and / or special permission.Visual cortexVisual perceptionBoundary segmentationLGNV1Pyramidal cellCortical mapsIllusory contoursCritical periodSynchronizationCortical columnsCortical feedbackV2Visual Brain and Visual Perception: How Does the Cortex Do Perceptual Grouping?Technical ReportBoston University Trustees