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Electrical Brain Responses to Beat Irregularities in Two Cases of Beat Deafness

Beat deafness, a recently documented form of congenital amusia, provides a unique window into functional specialization of neural circuitry for the processing of musical stimuli: Beat-deaf individuals exhibit deficits that are specific to the detection of a regular beat in music and the ability to m...

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Autores principales: Mathias, Brian, Lidji, Pascale, Honing, Henkjan, Palmer, Caroline, Peretz, Isabelle
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4764698/
https://www.ncbi.nlm.nih.gov/pubmed/26941591
http://dx.doi.org/10.3389/fnins.2016.00040
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author Mathias, Brian
Lidji, Pascale
Honing, Henkjan
Palmer, Caroline
Peretz, Isabelle
author_facet Mathias, Brian
Lidji, Pascale
Honing, Henkjan
Palmer, Caroline
Peretz, Isabelle
author_sort Mathias, Brian
collection PubMed
description Beat deafness, a recently documented form of congenital amusia, provides a unique window into functional specialization of neural circuitry for the processing of musical stimuli: Beat-deaf individuals exhibit deficits that are specific to the detection of a regular beat in music and the ability to move along with a beat. Studies on the neural underpinnings of beat processing in the general population suggest that the auditory system is capable of pre-attentively generating a predictive model of upcoming sounds in a rhythmic pattern, subserved largely within auditory cortex and reflected in mismatch negativity (MMN) and P3 event-related potential (ERP) components. The current study examined these neural correlates of beat perception in two beat-deaf individuals, Mathieu and Marjorie, and a group of control participants under conditions in which auditory stimuli were either attended or ignored. Compared to control participants, Mathieu demonstrated reduced behavioral sensitivity to beat omissions in metrical patterns, and Marjorie showed a bias to identify irregular patterns as regular. ERP responses to beat omissions reveal an intact pre-attentive system for processing beat irregularities in cases of beat deafness, reflected in the MMN component, and provide partial support for abnormalities in later cognitive stages of beat processing, reflected in an unreliable P3b component exhibited by Mathieu—but not Marjorie—compared to control participants. P3 abnormalities observed in the current study resemble P3 abnormalities exhibited by individuals with pitch-based amusia, and are consistent with attention or auditory-motor coupling accounts of deficits in beat perception.
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spelling pubmed-47646982016-03-03 Electrical Brain Responses to Beat Irregularities in Two Cases of Beat Deafness Mathias, Brian Lidji, Pascale Honing, Henkjan Palmer, Caroline Peretz, Isabelle Front Neurosci Psychology Beat deafness, a recently documented form of congenital amusia, provides a unique window into functional specialization of neural circuitry for the processing of musical stimuli: Beat-deaf individuals exhibit deficits that are specific to the detection of a regular beat in music and the ability to move along with a beat. Studies on the neural underpinnings of beat processing in the general population suggest that the auditory system is capable of pre-attentively generating a predictive model of upcoming sounds in a rhythmic pattern, subserved largely within auditory cortex and reflected in mismatch negativity (MMN) and P3 event-related potential (ERP) components. The current study examined these neural correlates of beat perception in two beat-deaf individuals, Mathieu and Marjorie, and a group of control participants under conditions in which auditory stimuli were either attended or ignored. Compared to control participants, Mathieu demonstrated reduced behavioral sensitivity to beat omissions in metrical patterns, and Marjorie showed a bias to identify irregular patterns as regular. ERP responses to beat omissions reveal an intact pre-attentive system for processing beat irregularities in cases of beat deafness, reflected in the MMN component, and provide partial support for abnormalities in later cognitive stages of beat processing, reflected in an unreliable P3b component exhibited by Mathieu—but not Marjorie—compared to control participants. P3 abnormalities observed in the current study resemble P3 abnormalities exhibited by individuals with pitch-based amusia, and are consistent with attention or auditory-motor coupling accounts of deficits in beat perception. Frontiers Media S.A. 2016-02-24 /pmc/articles/PMC4764698/ /pubmed/26941591 http://dx.doi.org/10.3389/fnins.2016.00040 Text en Copyright © 2016 Mathias, Lidji, Honing, Palmer and Peretz. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Psychology
Mathias, Brian
Lidji, Pascale
Honing, Henkjan
Palmer, Caroline
Peretz, Isabelle
Electrical Brain Responses to Beat Irregularities in Two Cases of Beat Deafness
title Electrical Brain Responses to Beat Irregularities in Two Cases of Beat Deafness
title_full Electrical Brain Responses to Beat Irregularities in Two Cases of Beat Deafness
title_fullStr Electrical Brain Responses to Beat Irregularities in Two Cases of Beat Deafness
title_full_unstemmed Electrical Brain Responses to Beat Irregularities in Two Cases of Beat Deafness
title_short Electrical Brain Responses to Beat Irregularities in Two Cases of Beat Deafness
title_sort electrical brain responses to beat irregularities in two cases of beat deafness
topic Psychology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4764698/
https://www.ncbi.nlm.nih.gov/pubmed/26941591
http://dx.doi.org/10.3389/fnins.2016.00040
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