Short-term retention of visual information

Evidence in support of feature-based attention as an underlying mechanism

Markus H. Sneve, Kartik Sreenivasan, Dag Alnæs, Tor Endestad, Svein Magnussen

    Research output: Contribution to journalArticle

    Abstract

    Retention of features in visual short-term memory (VSTM) involves maintenance of sensory traces in early visual cortex. However, the mechanism through which this is accomplished is not known. Here, we formulate specific hypotheses derived from studies on feature-based attention to test the prediction that visual cortex is recruited by attentional mechanisms during VSTM of low-level features. Functional magnetic resonance imaging (fMRI) of human visual areas revealed that neural populations coding for task-irrelevant feature information are suppressed during maintenance of detailed spatial frequency memory representations. The narrow spectral extent of this suppression agrees well with known effects of feature-based attention. Additionally, analyses of effective connectivity during maintenance between retinotopic areas in visual cortex show that the observed highlighting of task-relevant parts of the feature spectrum originates in V4, a visual area strongly connected with higher-level control regions and known to convey top-down influence to earlier visual areas during attentional tasks. In line with this property of V4 during attentional operations, we demonstrate that modulations of earlier visual areas during memory maintenance have behavioral consequences, and that these modulations are a result of influences from V4.

    Original languageEnglish (US)
    Number of pages1
    JournalNeuropsychologia
    Volume66
    DOIs
    StatePublished - Jan 1 2015

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    Visual Cortex
    Maintenance
    Short-Term Memory
    Magnetic Resonance Imaging
    Retention (Psychology)
    Population

    Keywords

    • Feature-based attention
    • Functional magnetic resonance imaging
    • Low-level visual features
    • Short-term memory
    • Visual cortex

    ASJC Scopus subject areas

    • Experimental and Cognitive Psychology
    • Cognitive Neuroscience
    • Behavioral Neuroscience

    Cite this

    Short-term retention of visual information : Evidence in support of feature-based attention as an underlying mechanism. / Sneve, Markus H.; Sreenivasan, Kartik; Alnæs, Dag; Endestad, Tor; Magnussen, Svein.

    In: Neuropsychologia, Vol. 66, 01.01.2015.

    Research output: Contribution to journalArticle

    Sneve, Markus H. ; Sreenivasan, Kartik ; Alnæs, Dag ; Endestad, Tor ; Magnussen, Svein. / Short-term retention of visual information : Evidence in support of feature-based attention as an underlying mechanism. In: Neuropsychologia. 2015 ; Vol. 66.
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