Visual brain and visual perception: how does the cortex do perceptual grouping?
How the brain generates visual percepts is a central problem in neuroscience. We propose a detailed neural model of how lateral geniculate nuclei 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.
Grossberg
S
S
Dept of Cognitive and Neural Systems, Boston University, MA 02215, USA.
Mingolla
E
E
Ross
W D
WD
D000818:Animals; D005246:Feedback / Q000502:physiology*; D008959:Models, Neurological; D014793:Visual Cortex / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*