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| Research article summary (published 9 Jan 2009): |
Neural correlates of categorical perception in learned vocal communication.
Full Abstract
The division of continuously variable acoustic signals into discrete perceptual categories is a fundamental feature of vocal communication, including human speech. Despite the importance of categorical perception to learned vocal communication, the neural correlates underlying this phenomenon await identification. We found that individual sensorimotor neurons in freely behaving swamp sparrows expressed categorical auditory responses to changes in note duration, a learned feature of their songs, and that the neural response boundary accurately predicted the categorical perceptual boundary measured in field studies of the same sparrow population. Furthermore, swamp sparrow populations that learned different song dialects showed different categorical perceptual boundaries that were consistent with the boundary being learned. Our results extend the analysis of the neural basis of perceptual categorization into the realm of vocal communication and advance the learned vocalizations of songbirds as a model for investigating how experience shapes categorical perception and the activity of categorically responsive neurons.
Author information
Author/s: Prather, Jonathan F (JF); Nowicki, Stephen (S); Anderson, Rindy C (RC); Peters, Susan (S); Mooney, Richard (R);
Affiliation: Department of Neurobiology, 101 Research Drive, Duke University Medical Center, Durham, North Carolina 27710, USA.
Journal and publication information
Publication Type: Journal Article
Journal: Nature neuroscience (Nat Neurosci), published in United States. (Language: eng)
Reference: 2009-Feb; vol 12 (issue 2) : pp 221-8
Dates: Created 2009/01/27; Completed 2009/02/27;
PMID: 19136972, status: MEDLINE (last retrieval date: 3/10/2009, IMS Date: 10 Mar 2009 00:00:00)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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