Neural correlates of shape-color binding in visual working memory

Mario Parra Rodriguez, Sergio Della Sala, Robert H. Logie, Alexa M. Morcom

    Research output: Contribution to journalArticle

    46 Citations (Scopus)

    Abstract

    The 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 is consistent with the involvement of different neural generators that collectively support visual temporary memory for features and for feature bindings. 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.

    Original languageEnglish
    Pages (from-to)27-36
    Number of pages10
    JournalNeuropsychologia
    Volume52
    DOIs
    Publication statusPublished - Jan 2014

    Keywords

    • Conjunctive representations
    • Feature integration
    • FMRI
    • Unitization
    • Working memory binding

    ASJC Scopus subject areas

    • Behavioral Neuroscience
    • Cognitive Neuroscience
    • Experimental and Cognitive Psychology
    • Arts and Humanities (miscellaneous)

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  • Cite this

    Parra Rodriguez, M., Della Sala, S., Logie, R. H., & Morcom, A. M. (2014). Neural correlates of shape-color binding in visual working memory. Neuropsychologia, 52, 27-36. https://doi.org/10.1016/j.neuropsychologia.2013.09.036