Preserved obstacle avoidance during reaching in patients with left visual neglect

McIntosh, R. D., McClements, K. I., Dijkerman, H. C., Birchall, D. and Milner, A. D. (2004) Preserved obstacle avoidance during reaching in patients with left visual neglect. Neuropsychologia, 42 8: 1107-1117. doi:10.1016/j.neuropsychologia.2003.11.023

Author McIntosh, R. D.
McClements, K. I.
Dijkerman, H. C.
Birchall, D.
Milner, A. D.
Title Preserved obstacle avoidance during reaching in patients with left visual neglect
Journal name Neuropsychologia   Check publisher's open access policy
ISSN 0028-3932
Publication date 2004
Sub-type Article (original research)
DOI 10.1016/j.neuropsychologia.2003.11.023
Volume 42
Issue 8
Start page 1107
End page 1117
Total pages 11
Editor A. D. Milner
M. Moscovitch
Place of publication Oxford
Publisher Pergamon
Collection year 2004
Language eng
Subject C1
380101 Sensory Processes, Perception and Performance
780108 Behavioural and cognitive sciences
Abstract We asked 12 patients with left visual neglect to bisect the gap between two cylinders or to reach rapidly between them to a more distal target zone. Both tasks demanded a motor response but these responses were quite different in nature. The bisection response was a communicative act whereby the patient indicated the perceived midpoint. The reaching task carried no imperative to bisect the gap, only to maintain a safe distance from either cylinder while steering to the target zone. Optimal performance on either task could only be achieved by reference to the location of both cylinders. Our analysis focused upon the relative influence of the left and right cylinders on the lateral location of the response. In the bisection task, all neglect patients showed qualitatively the same asymmetry, with the left cylinder exerting less influence than the right. In the reaching task, the neglect group behaved like normal subjects, being influenced approximately equally by the two cylinders. This was true for all bar two of the patients, who showed clear neglect in both tasks. We conclude that the visuomotor processing underlying obstacle avoidance during reaching is preserved in most patients with left visual neglect. (C) 2004 Elsevier Ltd. All rights reserved.
Keyword Behavioral Sciences
Psychology, Experimental
Visual Neglect
Obstacle Avoidance
Visual Perception
Visuomotor Control
Human Parietal Cortex
Unilateral Neglect
Spatial Neglect
Kinematic Analysis
Directional Hypokinesia
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2005 Higher Education Research Data Collection
School of Human Movement and Nutrition Sciences Publications
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Citation counts: TR Web of Science Citation Count  Cited 42 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 43 times in Scopus Article | Citations
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Created: Wed, 15 Aug 2007, 03:25:20 EST