Visual search in unilateral spatial neglect: The effects of distractors on a dynamic visual search task

Applied Neuropsychology. Adult
Rebeca Lauren EmersonJordi Peña-Casanova

Abstract

The objective of this study was to examine visual scanning performance in patients with Unilateral Spatial Neglect (USN) in a visual search task. Thirty-one right hemisphere stroke patients with USN were recruited. They performed a dynamic visual search task with two conditions, with and without distractors, while eye movements were monitored with an eye-tracker. The main goal of the task was to select target stimuli that appeared from the top of the screen and moved vertically downward. Target detection and visual scanning percentage were assessed over two hemispaces (right, left) on two conditions (distractor, no distractor). Most Scanned Regions (MSR) were calculated to analyze the areas of the screen where most points of fixation were directed to. Higher target detection rate and visual scanning percentages were found on the right hemispace on both conditions. From the MSRs we found that participants with a center of attention further to the right of the screen also presented smaller overall MSRs. Right hemisphere stroke patients with USN presented not only a significant rightward bias but reduced overall search areas, implying hyperattention does not only restrict search on the horizontal (right-left) axis but the vertical...Continue Reading

References

Feb 1, 1979·Annals of Neurology·K M Heilman, E Valenstein
Jun 1, 1997·Neuropsychologia·M Husain, C Kennard
Nov 22, 1997·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·G Vallar
Nov 22, 1997·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·H O Karnath
Dec 22, 1999·Neurology·P Bartolomeo, S Chokron
Feb 10, 2006·Brain and Cognition·Prudence PlummerMeg E Morris
Jul 18, 2006·Trends in Cognitive Sciences·Jillian H Fecteau, Douglas P Munoz
Dec 11, 2007·Neuropsychologia·Styrmir SaevarssonArni Kristjánsson
Jun 5, 2008·Behavior Research Methods·Ho-Chuan Huang, Tsui-Ying Wang
Aug 23, 2008·Progress in Brain Research·Albert Hoang DucMasud Husain
Sep 16, 2008·Neuropsychologia·Margarita SarriJon Driver
Nov 29, 2008·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Radek PtakArmin Schnider
Jan 22, 2009·Neuropsychologia·Beverly C ButlerRaymond Klein
Feb 24, 2009·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Guido GainottiFabrizio Doricchi
Jan 18, 2011·Vision Research·Eileen Kowler
Mar 31, 2011·Topics in Stroke Rehabilitation·Hebert Pereira FerreiraCharles André
Jan 1, 1996·Neuropsychological Rehabilitation·K Tham
Apr 25, 2012·Frontiers in Human Neuroscience·Julia FellrathRadek Ptak
Sep 1, 2012·PloS One·Valerie BensonDavid Milner
Dec 1, 2012·The Journal of Neuroscience : the Official Journal of the Society for Neuroscience·Trenton A JerdeClayton E Curtis
May 2, 2013·Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia·Ken NakataniKatsumi Inoue
Aug 10, 2013·Neuroscience and Biobehavioral Reviews·Ulrich J PfeifferLeonhard Schilbach
Oct 1, 2013·Neuropsychologia·Albulena Shaqiri, Britt Anderson
Dec 4, 2013·Frontiers in Human Neuroscience·Luciano Fasotti, Marlies van Kessel
May 16, 2014·Brain Injury : [BI]·Preethi Thiagarajan, Kenneth J Ciuffreda
Jul 21, 2014·BMC Medical Informatics and Decision Making·Javier SolanaEnrique J Gómez
Sep 10, 2014·IEEE Journal of Biomedical and Health Informatics·Javier SolanaEnrique J Gomez
Jan 16, 2015·Journal of Vision·Ralf EngbertFelix A Wichmann
Jan 22, 2015·Neurological Sciences : Official Journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology·Livia PopaAlexandru Rafila
Jul 15, 2015·PloS One·Simone HopfnerThomas Nyffeler
Apr 2, 2016·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Simone Vossel, Gereon R Fink

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Citations

Nov 6, 2020·Journal of Clinical and Experimental Neuropsychology·Antonia F Ten BrinkStefan Van der Stigchel
Jul 2, 2020·Neuropsychologia·Jolene A Cox, Anne M Aimola Davies

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