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Behavioural Neurology
Volume 13 (2002), Issue 1-2, Pages 17-28
http://dx.doi.org/10.1155/2002/495854

Is Grasping Impaired in Hemispatial Neglect?

Monika Harvey,1 Stephen R. Jackson,2 Roger Newport,2 Tanja Krämer,1 D. Llewlyn Morris,3 and Lindsay Dow4

1Department of Psychology, University of Glasgow, Glasgow, UK
2School of Psychology, University of Nottingham, Nottingham, NG7 2RD, UK
3Centre for Perception, Attention, and Motor Sciences, University of Wales, Bangor, Gwynedd LL57 2DG, UK
4Care of the Elderly, Frenchay Hospital, University of Bristol, BS8 1PN, UK

Received 2 July 2002; Accepted 2 July 2002

Copyright © 2002 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Patients with right unilateral cerebral stroke, four of which showed acute hemispatial neglect, and healthy aged-matched controls were tested for their ability to grasp objects located in either right or left space at near or far distances. Reaches were performed either in free vision or without visual feedback from the hand or target object. It was found that the patient group showed normal grasp kinematics with respect to maximum grip aperture, grip orientation, and the time taken to reach the maximum grip aperture. Analysis of hand path curvature showed that control subjects produced straighter right hand reaches when vision was available compared to when it was not. The right hemisphere lesioned patients, however, showed similar levels of curvature in each of these conditions. No behavioural differences, though, could be found between right hemisphere lesioned patients with or without hemispatial neglect on either grasp parameters, path deviation or temporal kinematics.