The Effect of Conditional Probability of Chord Progression on Brain Response: An MEG Study
Open Access
- 25 February 2011
- journal article
- research article
- Published by Public Library of Science (PLoS) in PLOS ONE
- Vol. 6 (2), e17337
- https://doi.org/10.1371/journal.pone.0017337
Abstract
Recent electrophysiological and neuroimaging studies have explored how and where musical syntax in Western music is processed in the human brain. An inappropriate chord progression elicits an event-related potential (ERP) component called an early right anterior negativity (ERAN) or simply an early anterior negativity (EAN) in an early stage of processing the musical syntax. Though the possible underlying mechanism of the EAN is assumed to be probabilistic learning, the effect of the probability of chord progressions on the EAN response has not been previously explored explicitly. In the present study, the empirical conditional probabilities in a Western music corpus were employed as an approximation of the frequencies in previous exposure of participants. Three types of chord progression were presented to musicians and non-musicians in order to examine the correlation between the probability of chord progression and the neuromagnetic response using magnetoencephalography (MEG). Chord progressions were found to elicit early responses in a negatively correlating fashion with the conditional probability. Observed EANm (as a magnetic counterpart of the EAN component) responses were consistent with the previously reported EAN responses in terms of latency and location. The effect of conditional probability interacted with the effect of musical training. In addition, the neural response also correlated with the behavioral measures in the non-musicians. Our study is the first to reveal the correlation between the probability of chord progression and the corresponding neuromagnetic response. The current results suggest that the physiological response is a reflection of the probabilistic representations of the musical syntax. Moreover, the results indicate that the probabilistic representation is related to the musical training as well as the sensitivity of an individual.Keywords
This publication has 52 references indexed in Scilit:
- Unsupervised statistical learning underpins computational, behavioural, and neural manifestations of musical expectationNeuroImage, 2010
- Musical training modulates the development of syntax processing in childrenNeuroImage, 2009
- A Generalized Mechanism for Perception of Pitch PatternsJournal of Neuroscience, 2009
- Review on solving the inverse problem in EEG source analysisJournal of NeuroEngineering and Rehabilitation, 2008
- Cognitive Components of Regularity Processing in the Auditory DomainPLOS ONE, 2008
- Effects of Unexpected Chords and of Performer's Expression on Brain Responses and Electrodermal ActivityPLOS ONE, 2008
- Double dissociation between rules and memory in music: An event-related potential studyNeuroImage, 2007
- Investigating the Relationship of Music and Language in ChildrenAnnals of the New York Academy of Sciences, 2005
- Volumetric vs. surface-based alignment for localization of auditory cortex activationNeuroImage, 2005
- Event-related brain potentials during natural speech processing: effects of semantic, morphological and syntactic violationsCognitive Brain Research, 1993