PMID: 9450609Feb 5, 1998Paper

Visual extinction and cortical connectivity in human vision

Brain Research. Cognitive Brain Research
M PavlovskayaH Ring

Abstract

Visual extinction is a common, poorly understood, consequence of unilateral cerebral damage, where a patient fails to detect one of two simultaneously presented stimuli (the one more contralateral to the lesion), despite the fact that each stimulus is correctly detected when presented in isolation. The phenomenon implies a failure of shifting attention from an attended object to an unattended one. We show here that pair detection is improved in conditions where the two stimuli presented to the two halves of the visual field are proximal, co-oriented and co-axial. It is further shown that stimulus properties producing reduced extinction correlate with the selectivity pattern of spatial lateral interactions observed in the primary visual cortex. We suggest that neuronal activity in early stages of cortical visual processing encodes, using long-range lateral interactions, an image description in which visual objects are already segmented and marked. Segmentation seems to function properly even in the presence of significant destruction of the parietal cortex leading to extinction.

References

Jan 1, 1992·Spatial Vision·Y Adini, D Sagi
Jul 1, 1989·Psychological Review·J Duncan, G W Humphreys
Jan 1, 1994·Ciba Foundation Symposium·C D Gilbert
Feb 15, 1994·Proceedings of the National Academy of Sciences of the United States of America·U Polat, D Sagi
Jan 1, 1994·Vision Research·U Polat, D Sagi
Nov 15, 1993·Proceedings of the National Academy of Sciences of the United States of America·R MalachA Grinvald
Jan 31, 1997·Science·J B MattingleyJ Driver
Oct 1, 1993·Journal of Cognitive Neuroscience·G C BaylisR D Rafal

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Citations

Jul 9, 2013·Experimental Brain Research·Kathleen VancleefGlyn W Humphreys
Feb 13, 2001·Cognition·J Driver, P Vuilleumier
Nov 6, 2002·Neuropsychologia·Radek PtakArmin Schnider
Oct 21, 2000·Progress in Neurobiology·G Kerkhoff
May 14, 1999·Current Opinion in Neurobiology·M Behrmann, C Haimson
Sep 9, 2011·Attention, Perception & Psychophysics·Pieter R Roelfsema, Roos Houtkamp
Dec 19, 2015·Journal of Cognitive Neuroscience·Sarah J RappaportGlyn W Humphreys
Feb 9, 2013·Neuroscience and Biobehavioral Reviews·Radek Ptak, Julia Fellrath
Feb 18, 2005·Neuropsychologia·Joseph L BrooksLynn C Robertson
Apr 10, 2007·Vision Research·Yasuto TanakaMasaya Misaki
Dec 1, 2005·Brain : a Journal of Neurology·Jacqueline C Snow, Jason B Mattingley

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