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- Title
Visual neglect: Is there a relationship between impaired spatial working memory and re-cancellation?
- Authors
Wansard, Murielle; Meulemans, Thierry; Gillet, Sophie; Segovia, Fermin; Bastin, Christine; Toba, Monica; Bartolomeo, Paolo
- Abstract
In visual search tasks, neglect patients tend to explore and repeatedly re-cancel stimuli on the ipsilesional side, as if they did not realize that they had previously examined the rightward locations favoured by their lateral bias. The aim of this study was to explore the hypothesis that a spatial working memory deficit explains these ipsilesional re-cancellation errors in neglect patients. For the first time, we evaluated spatial working memory and re-cancellation through separate and independent tasks in a group of patients with right hemisphere damage and a diagnosis of left neglect. Results showed impaired spatial working memory in neglect patients. Compared to the control group, neglect patients cancelled fewer targets and made more re-cancellations both on the left side and on the right side. The spatial working memory deficit appears to be related to re-cancellations, but only for some neglect patients. Alternative interpretations of re-exploration of space are discussed.
- Subjects
UNILATERAL neglect; COGNITION disorders; VISUAL extinction (Neurology); BRAIN damage; TASK performance; SHORT-term memory; SPATIAL memory
- Publication
Experimental Brain Research, 2014, Vol 232, Issue 10, p3333
- ISSN
0014-4819
- Publication type
Article
- DOI
10.1007/s00221-014-4028-4