The vertical-horizontal illusion in hemi-spatial neglect

Neuropsychologia
M de Montalembert, P Mamassian

Abstract

The vertical-horizontal illusion is a robust phenomenon of length mis-estimation between two orthogonal lines. This illusion involves an anisotropy component that makes the vertical line appear longer than the horizontal one and a bisection component that makes the bisected line shorter than the bisecting one. Six patients presenting a moderate left hemi-neglect (N-patients) were compared to four right brain damaged patients without neglect (RH-patients) and with control participants in the perception of various spatial configurations of the vertical-horizontal illusion. Relative to controls, we found that both components of the illusion increased in patients: the anisotropy component rose from 5 to 11% and 10% (for N- and RH-patients, respectively) and the bisection component from 17 to 22% and 20% (for N- and RH-patients, respectively). In addition, we found that an horizontal-'T' figure oriented to the left produced much less bias than the same figure oriented to the right. These results are discussed in light of explanations based on attentional disengagement from an image junction and strength of the representation of objects extending over the neglected side.

References

Jan 1, 1991·Perception·R L Gregory
Aug 1, 1972·Journal of Neurology, Neurosurgery, and Psychiatry·G GainottiR Tissot
May 1, 1995·Journal of Clinical and Experimental Neuropsychology·I H RobertsonI Nimmo-Smith
Jan 1, 1995·Current Biology : CB·A D Milner, M Harvey
Jan 1, 1993·Perception & Psychophysics·W Prinzmetal, L Gettleman
Jan 1, 1997·Spatial Vision·D H Brainard
Oct 17, 1998·Vision Research·P Mamassian, M S Landy
Jun 4, 1999·Stroke; a Journal of Cerebral Circulation·A BowenR C Tallis
Dec 22, 1999·Neurology·P Bartolomeo, S Chokron
Oct 21, 2000·Progress in Neurobiology·G Kerkhoff
Jan 10, 2001·Seminars in Neurology·K M HeilmanR T Watson
Feb 27, 2001·Brain : a Journal of Neurology·S Ferber, H O Karnath
Oct 20, 2001·Neuropsychologia·L RueckertM Repplinger
Jul 18, 2002·Journal of Neurology, Neurosurgery, and Psychiatry·P AzouviUNKNOWN French Collaborative Study Group on Assessment of Unilateral Neglect (GEREN/GRECO)
Jun 1, 1957·Journal of Experimental Psychology·T M KUNNAPAS
Feb 1, 1955·Journal of Experimental Psychology·T M KUNNAPAS
Jun 1, 1947·Journal of Experimental Psychology·F W FINGER, D K SPELT
Mar 20, 2010·Vision Research·Pascal Mamassian, Marie de Montalembert
Jul 1, 1998·Trends in Cognitive Sciences·J Driver, C Spence

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Citations

Apr 24, 2013·Experimental Brain Research·A SeddaG Bottini
Jul 1, 2011·Neuropsychological Rehabilitation·Nathalie BierUNKNOWN SemAssist Team
Mar 5, 2011·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Pom CharrasPaolo Bartolomeo
Feb 29, 2020·Journal of Motor Behavior·Shijun Yan, Jan M Hondzinski

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