Invariance to background noise as a signature of non-primary auditory cortex
© 2019, The Author(s). Despite well-established anatomical differences between primary and non-primary auditory cortex, the associated representational transformations have remained elusive. Here we show that primary and non-primary auditory cortex are differentiated by their invariance to real-worl...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
Springer Science and Business Media LLC
2021
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| Online Access: | https://hdl.handle.net/1721.1/136424 |
| _version_ | 1811071576618041344 |
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| author | Kell, Alexander JE McDermott, Josh H |
| author2 | Massachusetts Institute of Technology. Department of Brain and Cognitive Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Brain and Cognitive Sciences Kell, Alexander JE McDermott, Josh H |
| author_sort | Kell, Alexander JE |
| collection | MIT |
| description | © 2019, The Author(s). Despite well-established anatomical differences between primary and non-primary auditory cortex, the associated representational transformations have remained elusive. Here we show that primary and non-primary auditory cortex are differentiated by their invariance to real-world background noise. We measured fMRI responses to natural sounds presented in isolation and in real-world noise, quantifying invariance as the correlation between the two responses for individual voxels. Non-primary areas were substantially more noise-invariant than primary areas. This primary-nonprimary difference occurred both for speech and non-speech sounds and was unaffected by a concurrent demanding visual task, suggesting that the observed invariance is not specific to speech processing and is robust to inattention. The difference was most pronounced for real-world background noise—both primary and non-primary areas were relatively robust to simple types of synthetic noise. Our results suggest a general representational transformation between auditory cortical stages, illustrating a representational consequence of hierarchical organization in the auditory system. |
| first_indexed | 2024-09-23T08:53:21Z |
| format | Article |
| id | mit-1721.1/136424 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:53:21Z |
| publishDate | 2021 |
| publisher | Springer Science and Business Media LLC |
| record_format | dspace |
| spelling | mit-1721.1/1364242023-09-26T19:54:08Z Invariance to background noise as a signature of non-primary auditory cortex Kell, Alexander JE McDermott, Josh H Massachusetts Institute of Technology. Department of Brain and Cognitive Sciences McGovern Institute for Brain Research at MIT Center for Brains, Minds, and Machines © 2019, The Author(s). Despite well-established anatomical differences between primary and non-primary auditory cortex, the associated representational transformations have remained elusive. Here we show that primary and non-primary auditory cortex are differentiated by their invariance to real-world background noise. We measured fMRI responses to natural sounds presented in isolation and in real-world noise, quantifying invariance as the correlation between the two responses for individual voxels. Non-primary areas were substantially more noise-invariant than primary areas. This primary-nonprimary difference occurred both for speech and non-speech sounds and was unaffected by a concurrent demanding visual task, suggesting that the observed invariance is not specific to speech processing and is robust to inattention. The difference was most pronounced for real-world background noise—both primary and non-primary areas were relatively robust to simple types of synthetic noise. Our results suggest a general representational transformation between auditory cortical stages, illustrating a representational consequence of hierarchical organization in the auditory system. 2021-10-27T20:35:19Z 2021-10-27T20:35:19Z 2019 2021-03-26T16:03:37Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/136424 en 10.1038/S41467-019-11710-Y Nature Communications Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf Springer Science and Business Media LLC Nature |
| spellingShingle | Kell, Alexander JE McDermott, Josh H Invariance to background noise as a signature of non-primary auditory cortex |
| title | Invariance to background noise as a signature of non-primary auditory cortex |
| title_full | Invariance to background noise as a signature of non-primary auditory cortex |
| title_fullStr | Invariance to background noise as a signature of non-primary auditory cortex |
| title_full_unstemmed | Invariance to background noise as a signature of non-primary auditory cortex |
| title_short | Invariance to background noise as a signature of non-primary auditory cortex |
| title_sort | invariance to background noise as a signature of non primary auditory cortex |
| url | https://hdl.handle.net/1721.1/136424 |
| work_keys_str_mv | AT kellalexanderje invariancetobackgroundnoiseasasignatureofnonprimaryauditorycortex AT mcdermottjoshh invariancetobackgroundnoiseasasignatureofnonprimaryauditorycortex |