Age Differences in the Neuroelectric Adaptation to Meaningful Sounds
Much of what we know regarding the effect of stimulus repetition on neuroelectric adaptation comes from studies using artificially produced pure tones or harmonic complex sounds. Little is known about the neural processes associated with the representation of everyday sounds and how these may be aff...
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| Format: | Online |
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Public Library of Science
2013
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| Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3723892/ |
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pubmed-3723892 |
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pubmed-37238922013-08-09 Age Differences in the Neuroelectric Adaptation to Meaningful Sounds Leung, Ada W. S. He, Yu Grady, Cheryl L. Alain, Claude Research Article Much of what we know regarding the effect of stimulus repetition on neuroelectric adaptation comes from studies using artificially produced pure tones or harmonic complex sounds. Little is known about the neural processes associated with the representation of everyday sounds and how these may be affected by aging. In this study, we used real life, meaningful sounds presented at various azimuth positions and found that auditory evoked responses peaking at about 100 and 180 ms after sound onset decreased in amplitude with stimulus repetition. This neural adaptation was greater in young than in older adults and was more pronounced when the same sound was repeated at the same location. Moreover, the P2 waves showed differential patterns of domain-specific adaptation when location and identity was repeated among young adults. Background noise decreased ERP amplitudes and modulated the magnitude of repetition effects on both the N1 and P2 amplitude, and the effects were comparable in young and older adults. These findings reveal an age-related difference in the neural processes associated with adaptation to meaningful sounds, which may relate to older adults’ difficulty in ignoring task-irrelevant stimuli. Public Library of Science 2013-07-25 /pmc/articles/PMC3723892/ /pubmed/23935900 http://dx.doi.org/10.1371/journal.pone.0068892 Text en © 2013 Leung et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
| repository_type |
Open Access Journal |
| institution_category |
Foreign Institution |
| institution |
US National Center for Biotechnology Information |
| building |
NCBI PubMed |
| collection |
Online Access |
| language |
English |
| format |
Online |
| author |
Leung, Ada W. S. He, Yu Grady, Cheryl L. Alain, Claude |
| spellingShingle |
Leung, Ada W. S. He, Yu Grady, Cheryl L. Alain, Claude Age Differences in the Neuroelectric Adaptation to Meaningful Sounds |
| author_facet |
Leung, Ada W. S. He, Yu Grady, Cheryl L. Alain, Claude |
| author_sort |
Leung, Ada W. S. |
| title |
Age Differences in the Neuroelectric Adaptation to Meaningful Sounds |
| title_short |
Age Differences in the Neuroelectric Adaptation to Meaningful Sounds |
| title_full |
Age Differences in the Neuroelectric Adaptation to Meaningful Sounds |
| title_fullStr |
Age Differences in the Neuroelectric Adaptation to Meaningful Sounds |
| title_full_unstemmed |
Age Differences in the Neuroelectric Adaptation to Meaningful Sounds |
| title_sort |
age differences in the neuroelectric adaptation to meaningful sounds |
| description |
Much of what we know regarding the effect of stimulus repetition on neuroelectric adaptation comes from studies using artificially produced pure tones or harmonic complex sounds. Little is known about the neural processes associated with the representation of everyday sounds and how these may be affected by aging. In this study, we used real life, meaningful sounds presented at various azimuth positions and found that auditory evoked responses peaking at about 100 and 180 ms after sound onset decreased in amplitude with stimulus repetition. This neural adaptation was greater in young than in older adults and was more pronounced when the same sound was repeated at the same location. Moreover, the P2 waves showed differential patterns of domain-specific adaptation when location and identity was repeated among young adults. Background noise decreased ERP amplitudes and modulated the magnitude of repetition effects on both the N1 and P2 amplitude, and the effects were comparable in young and older adults. These findings reveal an age-related difference in the neural processes associated with adaptation to meaningful sounds, which may relate to older adults’ difficulty in ignoring task-irrelevant stimuli. |
| publisher |
Public Library of Science |
| publishDate |
2013 |
| url |
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3723892/ |
| _version_ |
1611998087660699648 |