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Neural correlates of shape–color binding in visual working memory
journal contribution
posted on 2023-06-09, 17:22 authored by Mario A Parra, Sergio Della Sala, Robert H Logie, Alexa MorcomAlexa MorcomThe present study addressed an outstanding issue regarding feature binding in working memory (WM): Whether this function engages specific resources relative to those required to process individual features. We investigated the brain regions supporting the encoding and maintenance of features and bindings in a change detection task, in which 22 healthy young volunteers remembered visual arrays of abstract shapes, colors or shape-color bindings while undergoing fMRI. After an unfilled delay they saw a second array and judged whether the features or combination of features presented across the two arrays were the same or different. Temporary retention of feature bindings was found to involve additional cortical regions compared with retaining single features, regardless of whether the number of objects or the number of features differed between feature-only and binding conditions. This binding-specific activation was not consistent with the involvement of a general purpose executive resource. Regions within the parietal, temporal and occipital cortex, but not within the prefrontal cortex or the medial temporal lobe, appear to support the integrated object binding function investigated in this study. Our findings suggest that both individual features and their binding within integrated objects are used to represent complex objects in WM.
History
Publication status
- Published
File Version
- Accepted version
Journal
NeuropsychologiaISSN
0028-3932Publisher
ElsevierVolume
52Page range
27-36Department affiliated with
- Psychology Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2019-03-26First Compliant Deposit (FCD) Date
2019-03-25Usage metrics
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