The neural basis of visuomotor deficits in hemispatial neglect

Rossit, S., Malhotra, P., Muir, K. , Reeves, I., Duncan, G., Birschel, P. and Harvey, M. (2009) The neural basis of visuomotor deficits in hemispatial neglect. Neuropsychologia, 47(10), pp. 2149-2153. (doi:10.1016/j.neuropsychologia.2009.04.015)

Full text not currently available from Enlighten.

Abstract

We have recently reported that patients with hemispatial neglect demonstrate increased terminal errors when performing delayed leftward reaches and that right-brain damaged patients (irrespective of neglect) take longer to complete their movements [Rossit, S., Muir, K., Reeves, I., Duncan, G., Birschel, P., and Harvey, M. (2009). Immediate and delayed reaching in hemispatial neglect. Neuropsychologiaa 47, 1563–1573]. Here we conducted an initial voxel-based lesion-symptom analysis to examine the neural basis of such deficits in 21 right-brain damaged subjects with 11 patients suffering from hemispatial neglect (2 more than in Rossit et al. [Rossit S., Muir K., Reeves I., Duncan, G., Birschel, P., and Harvey, M. (2009). Immediate and delayed reaching in hemispatial neglect. Neuropsychologia 47, 1563–1573] and 10 control patients without the condition. We found that the accuracy impairments in delayed leftward reaches were associated with damage to occipito-temporal areas. In contrast, the movement time slowing was related to more anterior lesions in the frontal lobe. These findings agree with the view that neglect affects actions thought to depend on the processing carried out by the ventral visual stream. In addition, we suggest that the timing impairments which are not neglect-specific maybe be driven by frontal structures.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Muir, Professor Keith and Harvey, Dr Monika and Reeves, Dr Ian
Authors: Rossit, S., Malhotra, P., Muir, K., Reeves, I., Duncan, G., Birschel, P., and Harvey, M.
College/School:College of Medical Veterinary and Life Sciences > Institute of Neuroscience and Psychology
College of Science and Engineering > School of Psychology
College of Medical Veterinary and Life Sciences > School of Medicine, Dentistry & Nursing
Journal Name:Neuropsychologia
Publisher:Pergamon
ISSN:0028-3932
ISSN (Online):1873-3514
Published Online:24 April 2009

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