Face Repetition Effects in Implicit and Explicit Memory Tests as Measured by fMRI

Recent parallels between neurophysiological and neuroimaging findings suggest that repeated stimulus processing produces decreased responses in brain regions associated with that processing — a ‘repetition suppression’ effect. In the present study, volunteers performed two tasks on repeated presenta...

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Bibliographic Details
Published in:Cerebral cortex (New York, N.Y. 1991) N.Y. 1991), 2002-02, Vol.12 (2), p.178-186
Main Authors: Henson, R.N.A., Shallice, T., Gorno-Tempini, M.L., Dolan, R.J.
Format: Article
Language:English
Subjects:
Adult
Attention - physiology
Face
Female
Humans
Magnetic Resonance Imaging
Male
Pattern Recognition, Visual - physiology
Recognition (Psychology) - physiology
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Summary:Recent parallels between neurophysiological and neuroimaging findings suggest that repeated stimulus processing produces decreased responses in brain regions associated with that processing — a ‘repetition suppression’ effect. In the present study, volunteers performed two tasks on repeated presentation of famous and unfamiliar faces during functional magnetic resonance imaging (fMRI). In the implicit task, they made fame-judgements (regardless of repetition); in the explicit task, they made episodic recognition judgements (regardless of familiarity). Only in the implicit task was repetition suppression observed: for famous faces in a right lateral fusiform region, and for both famous and unfamiliar faces in a left inferior occipital region. Repetition suppression is therefore not an automatic consequence of repeated perceptual processing of stimuli.
ISSN:1047-3211
1460-2199
DOI:10.1093/cercor/12.2.178