Perceptual completion across the vertical meridian and the role of early visual cortex

Jonathan Pillow, Nava Rubin

Research output: Contribution to journalArticle

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.

Original languageEnglish (US)
Pages (from-to)805-813
Number of pages9
JournalNeuron
Volume33
Issue number5
DOIs
StatePublished - Feb 28 2002

Fingerprint

Meridians
Visual Cortex

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Perceptual completion across the vertical meridian and the role of early visual cortex. / Pillow, Jonathan; Rubin, Nava.

In: Neuron, Vol. 33, No. 5, 28.02.2002, p. 805-813.

Research output: Contribution to journalArticle

Pillow, Jonathan ; Rubin, Nava. / Perceptual completion across the vertical meridian and the role of early visual cortex. In: Neuron. 2002 ; Vol. 33, No. 5. pp. 805-813.
@article{32a4e08eafd345318aa0a47d0e5426d7,
title = "Perceptual completion across the vertical meridian and the role of early visual cortex",
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.",
author = "Jonathan Pillow and Nava Rubin",
year = "2002",
month = "2",
day = "28",
doi = "10.1016/S0896-6273(02)00605-0",
language = "English (US)",
volume = "33",
pages = "805--813",
journal = "Neuron",
issn = "0896-6273",
publisher = "Cell Press",
number = "5",

}

TY - JOUR

T1 - Perceptual completion across the vertical meridian and the role of early visual cortex

AU - Pillow, Jonathan

AU - Rubin, Nava

PY - 2002/2/28

Y1 - 2002/2/28

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0037186093&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037186093&partnerID=8YFLogxK

U2 - 10.1016/S0896-6273(02)00605-0

DO - 10.1016/S0896-6273(02)00605-0

M3 - Article

VL - 33

SP - 805

EP - 813

JO - Neuron

JF - Neuron

SN - 0896-6273

IS - 5

ER -