Perceptual and semantic contributions to repetition priming of environmental sounds

DE Lucia, Marzia, Cocchi, Luca, Martuzzi, Roberto, Meuli, Reto A., Clarke, Stephanie and Murray, Micah M. (2010) Perceptual and semantic contributions to repetition priming of environmental sounds. Cerebral Cortex, 20 7: 1676-1684. doi:10.1093/cercor/bhp230


Author DE Lucia, Marzia
Cocchi, Luca
Martuzzi, Roberto
Meuli, Reto A.
Clarke, Stephanie
Murray, Micah M.
Title Perceptual and semantic contributions to repetition priming of environmental sounds
Journal name Cerebral Cortex   Check publisher's open access policy
ISSN 1047-3211
1460-2199
Publication date 2010-07-01
Sub-type Article (original research)
DOI 10.1093/cercor/bhp230
Volume 20
Issue 7
Start page 1676
End page 1684
Total pages 9
Place of publication Oxford, England, U. K.
Publisher Oxford University Press
Language eng
Formatted abstract
Repetition of environmental sounds, like their visual counterparts, can facilitate behavior and modulate neural responses, exemplifying plasticity in how auditory objects are represented or accessed. It remains controversial whether such repetition priming/suppression involves solely plasticity based on acoustic features and/or also access to semantic features. To evaluate contributions of physical and semantic features in eliciting repetition-induced plasticity, the present functional magnetic resonance imaging (fMRI) study repeated either identical or different exemplars of the initially presented object; reasoning that identical exemplars share both physical and semantic features, whereas different exemplars share only semantic features. Participants performed a living/man-made categorization task while being scanned at 3T. Repeated stimuli of both types significantly facilitated reaction times versus initial presentations, demonstrating perceptual and semantic repetition priming. There was also repetition suppression of fMRI activity within overlapping temporal, premotor, and prefrontal regions of the auditory "what" pathway. Importantly, the magnitude of suppression effects was equivalent for both physically identical and semantically related exemplars. That the degree of repetition suppression was irrespective of whether or not both perceptual and semantic information was repeated is suggestive of a degree of acoustically independent semantic analysis in how object representations are maintained and retrieved.
Keyword Auditory
Fmri
Object Recognition
Perceptual priming
Semantic priming
What and where pathways
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
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