Perceptual completion across the vertical meridian and the role of early visual cortex. Pillow, J. & Rubin, N. Neuron, 33(5):805-13, 2002. abstract bibtex Perceptual completion can link widely separated contour fragments and interpolate illusory contours (ICs) between them. The mechanisms underlying such long-range linking are not well understood. Here we report that completion is much poorer when ICs cross the vertical meridian than when they reside entirely within the left or right visual hemifield. This deficit reflects limitations in cross-hemispheric integration. We also show that the sensitivity to the interhemispheric divide is unique to perceptual completion: a comparable task which did not require completion showed no across-meridian impairment. We propose that these findings support the existence of specialized completion mechanisms in early visual cortical areas (V1/V2), since those areas are likely to be more sensitive to the interhemispheric divide.
@Article{Pillow2002,
author = {Jonathan Pillow and Nava Rubin},
journal = {Neuron},
title = {Perceptual completion across the vertical meridian and the role of early visual cortex.},
year = {2002},
number = {5},
pages = {805-13},
volume = {33},
abstract = {Perceptual completion can link widely separated contour fragments
and interpolate illusory contours (ICs) between them. The mechanisms
underlying such long-range linking are not well understood. Here
we report that completion is much poorer when ICs cross the vertical
meridian than when they reside entirely within the left or right
visual hemifield. This deficit reflects limitations in cross-hemispheric
integration. We also show that the sensitivity to the interhemispheric
divide is unique to perceptual completion: a comparable task which
did not require completion showed no across-meridian impairment.
We propose that these findings support the existence of specialized
completion mechanisms in early visual cortical areas (V1/V2), since
those areas are likely to be more sensitive to the interhemispheric
divide.},
keywords = {Animals, Form Perception, Humans, Optical Illusions, Psychological Tests, Visual Cortex, Visual Fields, Visual Perception, 11879643},
}
Downloads: 0
{"_id":"syBQMmefnDEBae4C7","bibbaseid":"pillow-rubin-perceptualcompletionacrosstheverticalmeridianandtheroleofearlyvisualcortex-2002","author_short":["Pillow, J.","Rubin, N."],"bibdata":{"bibtype":"article","type":"article","author":[{"firstnames":["Jonathan"],"propositions":[],"lastnames":["Pillow"],"suffixes":[]},{"firstnames":["Nava"],"propositions":[],"lastnames":["Rubin"],"suffixes":[]}],"journal":"Neuron","title":"Perceptual completion across the vertical meridian and the role of early visual cortex.","year":"2002","number":"5","pages":"805-13","volume":"33","abstract":"Perceptual completion can link widely separated contour fragments and interpolate illusory contours (ICs) between them. The mechanisms underlying such long-range linking are not well understood. Here we report that completion is much poorer when ICs cross the vertical meridian than when they reside entirely within the left or right visual hemifield. This deficit reflects limitations in cross-hemispheric integration. We also show that the sensitivity to the interhemispheric divide is unique to perceptual completion: a comparable task which did not require completion showed no across-meridian impairment. We propose that these findings support the existence of specialized completion mechanisms in early visual cortical areas (V1/V2), since those areas are likely to be more sensitive to the interhemispheric divide.","keywords":"Animals, Form Perception, Humans, Optical Illusions, Psychological Tests, Visual Cortex, Visual Fields, Visual Perception, 11879643","bibtex":"@Article{Pillow2002,\n author = {Jonathan Pillow and Nava Rubin},\n journal = {Neuron},\n title = {Perceptual completion across the vertical meridian and the role of early visual cortex.},\n year = {2002},\n number = {5},\n pages = {805-13},\n volume = {33},\n abstract = {Perceptual completion can link widely separated contour fragments\n\tand interpolate illusory contours (ICs) between them. The mechanisms\n\tunderlying such long-range linking are not well understood. Here\n\twe report that completion is much poorer when ICs cross the vertical\n\tmeridian than when they reside entirely within the left or right\n\tvisual hemifield. This deficit reflects limitations in cross-hemispheric\n\tintegration. We also show that the sensitivity to the interhemispheric\n\tdivide is unique to perceptual completion: a comparable task which\n\tdid not require completion showed no across-meridian impairment.\n\tWe propose that these findings support the existence of specialized\n\tcompletion mechanisms in early visual cortical areas (V1/V2), since\n\tthose areas are likely to be more sensitive to the interhemispheric\n\tdivide.},\n keywords = {Animals, Form Perception, Humans, Optical Illusions, Psychological Tests, Visual Cortex, Visual Fields, Visual Perception, 11879643},\n}\n\n","author_short":["Pillow, J.","Rubin, N."],"key":"Pillow2002","id":"Pillow2002","bibbaseid":"pillow-rubin-perceptualcompletionacrosstheverticalmeridianandtheroleofearlyvisualcortex-2002","role":"author","urls":{},"keyword":["Animals","Form Perception","Humans","Optical Illusions","Psychological Tests","Visual Cortex","Visual Fields","Visual Perception","11879643"],"metadata":{"authorlinks":{}}},"bibtype":"article","biburl":"http://endress.org/publications/ansgar.bib","dataSources":["xPGxHAeh3vZpx4yyE"],"keywords":["animals","form perception","humans","optical illusions","psychological tests","visual cortex","visual fields","visual perception","11879643"],"search_terms":["perceptual","completion","vertical","meridian","role","early","visual","cortex","pillow","rubin"],"title":"Perceptual completion across the vertical meridian and the role of early visual cortex.","year":2002}