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Dissociation of the neural correlates of implicit and explicit memory

Rugg, M; Mark, R; Walla, P; Schloerscheidt, A; Birch, C; Allan, K; (1998) Dissociation of the neural correlates of implicit and explicit memory. Nature , 392 (6676) pp.595 - 598. 10.1038/33396.

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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. The neural correlates of implicit memory have been studied previously, 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.

Type:Article
Title:Dissociation of the neural correlates of implicit and explicit memory
DOI:10.1038/33396
Additional information:Imported via OAI, 7:29:01 19th Sep 2007
Keywords:memory, Memory
UCL classification:UCL > School of Life and Medical Sciences > Faculty of Brain Sciences > Psychology and Language Sciences (Division of) > Institute of Cognitive Neuroscience
UCL > School of Life and Medical Sciences > Faculty of Life Sciences

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