Reaching movements may reveal the distorted topography of spatial representations after neglect

Jackson, S. R., Newport, R., Husain, M., Harvey, M. and Hindle, J. V. (2000) Reaching movements may reveal the distorted topography of spatial representations after neglect. Neuropsychologia, 38(4), pp. 500-507. (doi:10.1016/S0028-3932(99)00083-4)

Full text not currently available from Enlighten.

Abstract

It has been proposed that patients with spatial neglect fail to respond appropriately toward stimuli opposite their brain lesion because they have an impairment of directing attention. However, a disorder of ‘intention’ — or movement initiation — has also been demonstrated in this condition. Recently, the paths of neglect patients’ reaches have been shown to be abnormally curved, but it is unclear whether this impairment is visual or motor. Here, we show for the first time that reaches to and from identical positions executed by three patients recovering from neglect are significantly more curved to visually defined targets compared to when the same targets are defined proprioceptively. These findings indicate that abnormal hand paths in neglect result from an impairment in the visual representation of space used to guide reaches but without any general failure of spatial representation of target position. Furthermore, the curved hand paths reveal how the topography of that representation is distorted in spatial neglect.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Harvey, Dr Monika
Authors: Jackson, S. R., Newport, R., Husain, M., Harvey, M., and Hindle, J. V.
College/School:College of Science and Engineering > School of Psychology
Journal Name:Neuropsychologia
Publisher:Pergamon
ISSN:0028-3932
ISSN (Online):1873-3514

University Staff: Request a correction | Enlighten Editors: Update this record