Losing the music:aging affects the perception and subcortical neural representation of musical harmony

Bones, Oliver and Plack, Christopher J. (2015) Losing the music:aging affects the perception and subcortical neural representation of musical harmony. Journal of Neuroscience, 35 (9). pp. 4071-4080. ISSN 0270-6474

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Abstract

When two musical notes with simple frequency ratios are played simultaneously, the resulting musical chord is pleasing and evokes a sense of resolution or "consonance". Complex frequency ratios, on the other hand, evoke feelings of tension or "dissonance". Consonance and dissonance form the basis of harmony, a central component of Western music. In earlier work, we provided evidence that consonance perception is based on neural temporal coding in the brainstem (Bones et al., 2014). Here, we show that for listeners with clinically normal hearing, aging is associated with a decline in both the perceptual distinction and the distinctiveness of the neural representations of different categories of two-note chords. Compared with younger listeners, older listeners rated consonant chords as less pleasant and dissonant chords as more pleasant. Older listeners also had less distinct neural representations of consonant and dissonant chords as measured using a Neural Consonance Index derived from the electrophysiological "frequency-following response." The results withstood a control for the effect of age on general affect, suggesting that different mechanisms are responsible for the perceived pleasantness of musical chords and affective voices and that, for listeners with clinically normal hearing, age-related differences in consonance perception are likely to be related to differences in neural temporal coding.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Neuroscience
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2800
Subjects:
ID Code:
74476
Deposited By:
Deposited On:
01 Jul 2015 15:16
Refereed?:
Yes
Published?:
Published
Last Modified:
23 Sep 2020 02:14