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Brain responses to musical feature changes in adolescent cochlear implant users.

Petersen B, Weed E, Sandmann P, Brattico E, Hansen M, Sørensen SD, Vuust P - Front Hum Neurosci (2015)

Bottom Line: We found significant MMNs in adolescent CI users for deviations in timbre, intensity, and rhythm, indicating residual neural prerequisites for musical feature processing.Despite compliance from the CI participants, we found no effect of the music training, likely resulting from the brevity of the program.Future studies should test any beneficial effects of a longer lasting music intervention in adolescent CI users.

View Article: PubMed Central - PubMed

Affiliation: Center for Functionally Integrative Neuroscience, Aarhus University Hospital , Aarhus , Denmark ; Royal Academy of Music , Aarhus , Denmark.

ABSTRACT
Cochlear implants (CIs) are primarily designed to assist deaf individuals in perception of speech, although possibilities for music fruition have also been documented. Previous studies have indicated the existence of neural correlates of residual music skills in postlingually deaf adults and children. However, little is known about the behavioral and neural correlates of music perception in the new generation of prelingually deaf adolescents who grew up with CIs. With electroencephalography (EEG), we recorded the mismatch negativity (MMN) of the auditory event-related potential to changes in musical features in adolescent CI users and in normal-hearing (NH) age mates. EEG recordings and behavioral testing were carried out before (T1) and after (T2) a 2-week music training program for the CI users and in two sessions equally separated in time for NH controls. We found significant MMNs in adolescent CI users for deviations in timbre, intensity, and rhythm, indicating residual neural prerequisites for musical feature processing. By contrast, only one of the two pitch deviants elicited an MMN in CI users. This pitch discrimination deficit was supported by behavioral measures, in which CI users scored significantly below the NH level. Overall, MMN amplitudes were significantly smaller in CI users than in NH controls, suggesting poorer music discrimination ability. Despite compliance from the CI participants, we found no effect of the music training, likely resulting from the brevity of the program. This is the first study showing significant brain responses to musical feature changes in prelingually deaf adolescent CI users and their associations with behavioral measures, implying neural predispositions for at least some aspects of music processing. Future studies should test any beneficial effects of a longer lasting music intervention in adolescent CI users.

No MeSH data available.


Scatter plots illustrating the correlation between the mean MMN amplitude to the GuiD3 and age (left panel), mean amplitude to the RhyD6 deviant and age (middle panel), and mean MMN latency for the RhyD6 deviant and hearing age (=implant experience) in the adolescent CI users.
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Figure 5: Scatter plots illustrating the correlation between the mean MMN amplitude to the GuiD3 and age (left panel), mean amplitude to the RhyD6 deviant and age (middle panel), and mean MMN latency for the RhyD6 deviant and hearing age (=implant experience) in the adolescent CI users.

Mentions: For the MMN data, a significant positive association was found between mean amplitudes for the GuiD3 (r = 0.798) and RhyD6 (r = 0.605) and age, indicating that younger CI users had larger MMN responses than older CI users for these two deviants. Furthermore, we found a significant negative association between hearing age (implant experience) and mean latency for the RhyD6 (r = −0.838), indicating that CI users with higher hearing age had MMN responses with shorter latency for this deviant (Figure 5). A similar non-significant association was found for the SaxD4 deviant (r = −0.592, p = 0.055).


Brain responses to musical feature changes in adolescent cochlear implant users.

Petersen B, Weed E, Sandmann P, Brattico E, Hansen M, Sørensen SD, Vuust P - Front Hum Neurosci (2015)

Scatter plots illustrating the correlation between the mean MMN amplitude to the GuiD3 and age (left panel), mean amplitude to the RhyD6 deviant and age (middle panel), and mean MMN latency for the RhyD6 deviant and hearing age (=implant experience) in the adolescent CI users.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4319402&req=5

Figure 5: Scatter plots illustrating the correlation between the mean MMN amplitude to the GuiD3 and age (left panel), mean amplitude to the RhyD6 deviant and age (middle panel), and mean MMN latency for the RhyD6 deviant and hearing age (=implant experience) in the adolescent CI users.
Mentions: For the MMN data, a significant positive association was found between mean amplitudes for the GuiD3 (r = 0.798) and RhyD6 (r = 0.605) and age, indicating that younger CI users had larger MMN responses than older CI users for these two deviants. Furthermore, we found a significant negative association between hearing age (implant experience) and mean latency for the RhyD6 (r = −0.838), indicating that CI users with higher hearing age had MMN responses with shorter latency for this deviant (Figure 5). A similar non-significant association was found for the SaxD4 deviant (r = −0.592, p = 0.055).

Bottom Line: We found significant MMNs in adolescent CI users for deviations in timbre, intensity, and rhythm, indicating residual neural prerequisites for musical feature processing.Despite compliance from the CI participants, we found no effect of the music training, likely resulting from the brevity of the program.Future studies should test any beneficial effects of a longer lasting music intervention in adolescent CI users.

View Article: PubMed Central - PubMed

Affiliation: Center for Functionally Integrative Neuroscience, Aarhus University Hospital , Aarhus , Denmark ; Royal Academy of Music , Aarhus , Denmark.

ABSTRACT
Cochlear implants (CIs) are primarily designed to assist deaf individuals in perception of speech, although possibilities for music fruition have also been documented. Previous studies have indicated the existence of neural correlates of residual music skills in postlingually deaf adults and children. However, little is known about the behavioral and neural correlates of music perception in the new generation of prelingually deaf adolescents who grew up with CIs. With electroencephalography (EEG), we recorded the mismatch negativity (MMN) of the auditory event-related potential to changes in musical features in adolescent CI users and in normal-hearing (NH) age mates. EEG recordings and behavioral testing were carried out before (T1) and after (T2) a 2-week music training program for the CI users and in two sessions equally separated in time for NH controls. We found significant MMNs in adolescent CI users for deviations in timbre, intensity, and rhythm, indicating residual neural prerequisites for musical feature processing. By contrast, only one of the two pitch deviants elicited an MMN in CI users. This pitch discrimination deficit was supported by behavioral measures, in which CI users scored significantly below the NH level. Overall, MMN amplitudes were significantly smaller in CI users than in NH controls, suggesting poorer music discrimination ability. Despite compliance from the CI participants, we found no effect of the music training, likely resulting from the brevity of the program. This is the first study showing significant brain responses to musical feature changes in prelingually deaf adolescent CI users and their associations with behavioral measures, implying neural predispositions for at least some aspects of music processing. Future studies should test any beneficial effects of a longer lasting music intervention in adolescent CI users.

No MeSH data available.