Repetition effects for words and nonwords as indexed by event-related fMRI: a preliminary study.
We have previously shown differential effects of stimulus familiarity on the repetition-related responses in right fusiform cortex to both faces and symbols. Repetition of familiar stimuli produced a response decrease, whereas repetition of unfamiliar stimuli produced a response increase. In the present experiment, we used words and nonwords as the familiar and unfamiliar stimuli respectively. In this case, the only fusiform region showing the familiarity-by-repetition interaction was in anterior left fusiform. This left-lateralisation of the fusiform interaction is consistent with our hypothesis that these repetition-related effects occur in the same regions responsible for perceptual recognition of familiar stimuli.
Henson
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Wellcome Department of Cognitive Neurology & Institute of Cognitive Neuroscience, University College London, UK. r.henson@ucl.ac.uk
D000328:Adult; D002540:Cerebral Cortex / Q000502:physiology*; D003463:Cues; D004292:Dominance, Cerebral / Q000502:physiology; D005074:Evoked Potentials, Visual; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008959:Models, Neurological; D010364:Pattern Recognition, Visual / Q000502:physiology*; D012660:Semantics