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          Institute: Ernst Strüngmann Institute     Collection: Publikationen des Ernst Strüngmann Institutes     Display Documents

ID: 689117.0, Ernst Strüngmann Institute / Publikationen des Ernst Strüngmann Institutes
Receptive field focus of visual area V4 neurons determines responses to illusory surfaces
Authors:Cox, M. A.; Schmid, M. C.; Peters, A. J.; Saunders, R. C.; Leopold, D. A.; Maier, A.
Date of Publication (YYYY-MM-DD):2013-10-15
Journal Abbrev.:Proceedings of the National Academy of Sciences of the United States of America
Issue / Number:42
Start Page:17095
End Page:17100
Audience:Not Specified
Abstract / Description:Illusory figures demonstrate the visual system's ability to infer surfaces under conditions of fragmented sensory input. To investigate the role of midlevel visual area V4 in visual surface completion, we used multielectrode arrays to measure spiking responses to two types of visual stimuli: Kanizsa patterns that induce the perception of an illusory surface and physically similar control stimuli that do not. Neurons in V4 exhibited stronger and sometimes rhythmic spiking responses for the illusion-promoting configurations compared with controls. Moreover, this elevated response depended on the precise alignment of the neuron's peak visual field sensitivity (receptive field focus) with the illusory surface itself. Neurons whose receptive field focus was over adjacent inducing elements, less than 1.5 degrees away, did not show response enhancement to the illusion. Neither receptive field sizes nor fixational eye movements could account for this effect, which was present in both single-unit signals and multiunit activity. These results suggest that the active perceptual completion of surfaces and shapes, which is a fundamental problem in natural visual experience, draws upon the selective enhancement of activity within a distinct subpopulation of neurons in cortical area V4.
Free Keywords:visual perception; illusory contours; modal completion; nonhuman primate; visual cortex; figure-ground segregation; competitive interactions; perceptual completion; inferotemporal cortex; macaque v4; contours; organization; real; v1; representation
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:Ernst Strüngmann Institute
External Affiliations:NIMH, Sect Cognit Neurophysiol & Imaging, NIH, Dept Hlth & Human Serv, Bethesda, MD 20892 USA NIMH, Sect Cognit Neurophysiol & Imaging, NIH, Dept Hlth & Human Serv, Bethesda, MD 20892 USA NIMH, Neuropsychol Lab, NIH, Dept Hlth & Human Serv, Bethesda, MD 20892 USA Vanderbilt Univ, Dept Psychol, Coll Arts & Sci, Nashville, TN 37203 USA Max Planck Gesell, Ernst Strungmann Inst Neurosci, DE-60528 Frankfurt, Germany Univ Calif San Diego, Neurosci Grad Program, La Jolla, CA 92093 USA NEI, Neurophysiol Imaging Facil, NIMH, NINDS,NIH,Dept Hlth & Human Serv, Bethesda, MD 20892 USA %G English
Identifiers:ISSN:0027-8424 %R http://dx.doi.org/10.1073/pnas.131080... [ID No:1]
URL:<Go to ISI>://WOS:000325634200082 [ID No:2]
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