Dissociation of the neural correlates of implicit and explicit memory

Michael D. Rugg, Ruth E. Mark, Peter Walla, Astrid M. Schloerscheidt, Claire S. Birch, Kevin Allen

    Research output: Contribution to journalLetterpeer-review

    565 Citations (Scopus)

    Abstract

    One presentation of a word to a subject is enough to change the way in which the word is processed subsequently, even when there is no conscious (explicit) memory of the original presentation. This phenomenon is known as implicit memory(1-3). The neural correlates of implicit memory have been studied previously(4-11), but they have never been compared with the correlates of explicit memory while holding task conditions constant or while using a procedure that ensured that the neural correlates were not 'contaminated' by explicit memory. Here we use scalp-recorded event-related brain potentials to identify neural activity associated with implicit and explicit memory during the performance of a recognition memory task, Relative to new words, recently studied words produced activity in three neuroanatomically and functionally dissociable neural populations. One of these populations was activated whether or not the word was consciously recognized, and its activity therefore represents a neural correlate of implicit memory. Thus, when task and memory contamination effects are eliminated, the neural correlates of explicit and implicit memory differ qualitatively.

    Original languageEnglish
    Pages (from-to)595-598
    Number of pages4
    JournalNature
    Volume392
    Issue number6676
    DOIs
    Publication statusPublished - 9 Apr 1998

    Keywords

    • CONSCIOUS RECOLLECTION
    • POTENTIALS
    • JUDGMENTS
    • RETRIEVAL
    • RECOGNITION MEMORY

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