Spatial working memory and spatial attention rely on common neural processes in the intraparietal sulcus

Silk, Timothy J., Bellgrove, Mark A., Wrafter, Pia, Mattingley, Jason B. and Cunnington, Ross (2010) Spatial working memory and spatial attention rely on common neural processes in the intraparietal sulcus. NeuroImage, 53 2: 718-724. doi:10.1016/j.neuroimage.2010.06.068


Author Silk, Timothy J.
Bellgrove, Mark A.
Wrafter, Pia
Mattingley, Jason B.
Cunnington, Ross
Title Spatial working memory and spatial attention rely on common neural processes in the intraparietal sulcus
Journal name NeuroImage   Check publisher's open access policy
ISSN 1053-8119
1095-9572
Publication date 2010-11-01
Sub-type Article (original research)
DOI 10.1016/j.neuroimage.2010.06.068
Volume 53
Issue 2
Start page 718
End page 724
Total pages 7
Place of publication Maryland Heights, MO, United States
Publisher Academic Press
Collection year 2011
Language eng
Subject C1
1701 Psychology
Abstract Our ability to remember locations in space (spatial working memory) and our ability to direct attention to those locations (spatial attention) are two fundamental and closely related cognitive processes. A growing body of behavioural evidence suggests that spatial working memory and spatial attention share common resources, while neuroimaging studies show some overlap in the neural regions that mediate these two cognitive functions. The current study used fMRI to directly examine the extent to which spatial working memory and spatial attention rely on common underlying neural mechanisms. Twenty healthy participants underwent functional MRI while performing a dual task of spatial working memory incorporating a visual search task during the working memory retention interval. Working memory and visual search task loads were parametrically modulated. A wide network of prefrontal, premotor, and parietal regions showed increasing activity with increased spatial working memory load. Of these areas, part of the right supramarginal gyrus, lying along the intraparietal sulcus, showed a significant interaction such that the neural activity associated with spatial working memory load was significantly attenuated as visual search load in the dual task was increased. This interaction suggests that this part of the supramarginal gyrus, along the intraparietal sulcus, is critical for mediating both spatial working memory and shifts in spatial attention. Copyright © 2010 Elsevier Inc. All rights reserved.
Keyword Spatial working memory
Spatial attention
Visual search
Functional magnetic resonance imaging
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
Queensland Brain Institute Publications
School of Psychology Publications
 
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Created: Sun, 26 Sep 2010, 10:01:59 EST