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  A neural signature of regularity in sound is reduced in older adults

Herrmann, B., Maess, B., & Johnsrude, I. S. (2021). A neural signature of regularity in sound is reduced in older adults. Neurobiology of Aging, 109, 1-10. doi:10.1016/j.neurobiolaging.2021.09.011.

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 Creators:
Herrmann, Björn1, 2, 3, Author
Maess, Burkhard4, Author              
Johnsrude, Ingrid S.1, 5, Author
Affiliations:
1Department of Psychology, Brain and Mind Institute, University of Western Ontario, London, ON, Canada, ou_persistent22              
2Baycrest Health Sciences, Rotman Research Institute, University of Toronto, ON, Canada, ou_persistent22              
3Department of Psychology, University of Toronto, ON, Canada, ou_persistent22              
4Methods and Development Group Brain Networks, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_2205650              
5School of Communication Sciences & Disorders, University of Western Ontario, London, ON, Canada, ou_persistent22              

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 Abstract: Sensitivity to repetitions in sound amplitude and frequency is crucial for sound perception. As with other aspects of sound processing, sensitivity to such patterns may change with age, and may help explain some age-related changes in hearing such as segregating speech from background sound. We recorded magnetoencephalography to characterize differences in the processing of sound patterns between younger and older adults. We presented tone sequences that either contained a pattern (made of a repeated set of tones) or did not contain a pattern. We show that auditory cortex in older, compared to younger, adults is hyperresponsive to sound onsets, but that sustained neural activity in auditory cortex, indexing the processing of a sound pattern, is reduced. Hence, the sensitivity of neural populations in auditory cortex fundamentally differs between younger and older individuals, overresponding to sound onsets, while underresponding to patterns in sounds. This may help to explain some age-related changes in hearing such as increased sensitivity to distracting sounds and difficulties tracking speech in the presence of other sound.

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 Dates: 2021-09-032021-02-182021-09-082021-09-17
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.neurobiolaging.2021.09.011
Other: online ahead of print
PMID: 34634748
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Title: Neurobiology of Aging
  Other : Neurobiol. Aging
Source Genre: Journal
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Publ. Info: New York, NY [etc.] : Elsevier
Pages: - Volume / Issue: 109 Sequence Number: - Start / End Page: 1 - 10 Identifier: ISSN: 0197-4580
CoNE: https://pure.mpg.de/cone/journals/resource/954925491902