Peripheral and bimanual reaching in a stroke survivor with left visual neglect and extinction

Knights, Ethan, McIntosh, Robert D., Ford, Catherine ORCID: https://orcid.org/0000-0002-8646-9402, Buckingham, Gavin and Rossit, Stephanie ORCID: https://orcid.org/0000-0001-6640-2289 (2024) Peripheral and bimanual reaching in a stroke survivor with left visual neglect and extinction. Neuropsychologia, 201. ISSN 0028-3932

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Abstract

Whether attentional deficits are accompanied by visuomotor impairments following posterior parietal lesions has been debated for quite some time. This single-case study investigated reaching in a stroke survivor (E.B.) with left visual neglect and visual extinction following right temporo-parietal-frontal strokes. Unlike most neglect patients, E.B. did not present left hemiparesis, homonymous hemianopia nor showed evidence of motor neglect or extinction allowing us to examine, for the first time, if lateralised attentional deficits co-occur with deficits in peripheral and bimanual reaching. First, we found a classic optic ataxia field effect: E.B.’s accuracy was impaired when reaching to peripheral targets in her neglected left visual field (regardless of the hand used). Second, we found a larger bimanual cost for movement time in E.B. than controls when both hands reached to incongruent locations. E.B.’s visuomotor profile is similar the one of patients with optic ataxia showing that attentional deficits are accompanied by visuomotor deficits in the affected field.

Item Type: Article
Additional Information: Data availability statement: Data and code open and links in submission
Faculty \ School: Faculty of Medicine and Health Sciences > Norwich Medical School
Faculty of Social Sciences > School of Psychology
UEA Research Groups: Faculty of Medicine and Health Sciences > Research Centres > Lifespan Health
Faculty of Social Sciences > Research Groups > Cognition, Action and Perception
Depositing User: LivePure Connector
Date Deposited: 07 May 2024 12:31
Last Modified: 19 Jun 2024 09:30
URI: https://ueaeprints.uea.ac.uk/id/eprint/95085
DOI: 10.1016/j.neuropsychologia.2024.108901

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