Perceptual and semantic contributions to repetition priming of environmental sounds.

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Serval ID
serval:BIB_802AE4156B6D
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Perceptual and semantic contributions to repetition priming of environmental sounds.
Journal
Cerebral Cortex
Author(s)
De Lucia M., Cocchi L., Martuzzi R., Meuli R.A., Clarke S., Murray M.M.
ISSN
1460-2199[electronic], 1047-3211[linking]
Publication state
Published
Issued date
2010
Volume
20
Number
7
Pages
1676-1684
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
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.
Keywords
Acoustic Stimulation/methods, Adult, Auditory Perception/physiology, Brain Mapping, Discrimination (Psychology)/physiology, Environment, Female, Humans, Image Processing, Computer-Assisted/methods, Magnetic Resonance Imaging/methods, Male, Oxygen/blood, Photic Stimulation/methods, Reaction Time/physiology, Repression, Semantics, Sound, Young Adult
Pubmed
Web of science
Open Access
Yes
Create date
24/11/2009 12:16
Last modification date
25/09/2019 7:09
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