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Neuroreport. 2012 May 30;23(8):498-502. doi: 10.1097/WNR.0b013e328353764d.

Experience-dependent plasticity in pitch encoding: from brainstem to auditory cortex.

Author information

  • 1Department of Speech Language Hearing Sciences, Purdue University, West Lafayette, Indiana, USA. rkrish@purdue.edu

Abstract

Linguistic and musical pitch provide an analytic window to evaluate how neural representations of important pitch attributes of a sound undergo transformation from early sensory to later cognitive stages of processing in the human brain, and how pitch-relevant experience shapes these representations. These pitch attributes are shaped differentially depending on their functional relevance to a listener. Neural encoding of pitch-relevant information is shaped by the perceptual salience of domain-specific features at subcortical (auditory brainstem) and cortical stages of processing. The emergence of a functional ear asymmetry in the neural encoding of pitch-relevant information at a lower sensory processing level supports the view that local and feedforward and feedback mechanisms are involved in pitch-relevant processing. A theoretical framework for a neural network is proposed involving coordination between local, feedforward, and feedback components that can account for experience-induced enhancement of pitch representations at multiple levels of the auditory pathway.

PMID:
22495037
PMCID:
PMC3342423
DOI:
10.1097/WNR.0b013e328353764d
[PubMed - indexed for MEDLINE]
Free PMC Article
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