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Title: Discrete capacity limits and neuroanatomical correlates of visual short-term memory for objects and spatial locations
Authors: Konstantinou, Nikos 
Constantinidou, Fofi 
Kanai, Ryota 
Major Field of Science: Humanities
Field Category: Languages and Literature;Other Humanities
Keywords: Capacity limits;Visual short-term memory;Voxel-based morphometry
Issue Date: 1-Feb-2017
Source: Human Brain Mapping, 2017, vol. 38, no. 2, pp. 767-778
Volume: 38
Issue: 2
Start page: 767
End page: 778
Journal: Human brain mapping 
Abstract: Working memory is responsible for keeping information in mind when it is no longer in view, linking perception with higher cognitive functions. Despite such crucial role, short-term maintenance of visual information is severely limited. Research suggests that capacity limits in visual short-term memory (VSTM) are correlated with sustained activity in distinct brain areas. Here, we investigated whether variability in the structure of the brain is reflected in individual differences of behavioral capacity estimates for spatial and object VSTM. Behavioral capacity estimates were calculated separately for spatial and object information using a novel adaptive staircase procedure and were found to be unrelated, supporting domain-specific VSTM capacity limits. Voxel-based morphometry (VBM) analyses revealed dissociable neuroanatomical correlates of spatial versus object VSTM. Interindividual variability in spatial VSTM was reflected in the gray matter density of the inferior parietal lobule. In contrast, object VSTM was reflected in the gray matter density of the left insula. These dissociable findings highlight the importance of considering domain-specific estimates of VSTM capacity and point to the crucial brain regions that limit VSTM capacity for different types of visual information. Hum Brain Mapp 38:767-778, 2017. © 2016 Wiley Periodicals, Inc.
ISSN: 10970193
DOI: 10.1002/hbm.23416
Rights: © Wiley
Type: Article
Affiliation : University of Cyprus 
University of Sussex 
Araya Brain Imaging 
YHouse Inc 
Cyprus University of Technology 
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