title: Organization of texture segregation processing in primate visual cortex.
abstract: We investigated the intracortical organization of neuronal mass activity that is related to texture segregation on the basis of orientation contrast. Evoked potentials were recorded to a stimulus, signalling a contribution from texture segregation-sensitive mechanisms by means of specific response components. The specific components could only be recorded when textons had a spatial organization that leads to the percept of image segmentation. Equivalent dipole estimations of the specific response components suggested the presence of texture segregation-related activity in the primary visual cortex. These results were corroborated by current-source-density analysis of intracortical recordings in the awake monkey. A specific involvement of layers 2/3 and 5 of area 17 in the global process of image segmentation could be demonstrated.
authors.affiliation: Netherlands Ophthalmic Research Institute, Amsterdam.
authors.forename: V A
authors.initials: VA
authors.lastname: Lamme
authors.forename: B W
authors.initials: BW
authors.lastname: van Dijk
authors.forename: H
authors.initials: H
authors.lastname: Spekereijse
mesh_terms: D000818:Animals; D015350:Contrast Sensitivity / Q000502:physiology; D005074:Evoked Potentials, Visual / Q000502:physiology; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D008253:Macaca mulatta; D011601:Psychophysics; D013569:Synapses / Q000502:physiology; D014793:Visual Cortex / Q000502:physiology*