Neural tuning matches frequency-dependent time differences between the ears
The time it takes a sound to travel from source to ear differs between the ears and creates an interaural delay. It varies systematically with spatial direction and is generally modeled as a pure time delay, independent of frequency. In acoustical recordings, we found that interaural delay varies wi...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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eLife Sciences Publications Ltd
2015-04-01
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| Series: | eLife |
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| Online Access: | https://elifesciences.org/articles/06072 |
| _version_ | 1811200107138252800 |
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| author | Victor Benichoux Bertrand Fontaine Tom P Franken Shotaro Karino Philip X Joris Romain Brette |
| author_facet | Victor Benichoux Bertrand Fontaine Tom P Franken Shotaro Karino Philip X Joris Romain Brette |
| author_sort | Victor Benichoux |
| collection | DOAJ |
| description | The time it takes a sound to travel from source to ear differs between the ears and creates an interaural delay. It varies systematically with spatial direction and is generally modeled as a pure time delay, independent of frequency. In acoustical recordings, we found that interaural delay varies with frequency at a fine scale. In physiological recordings of midbrain neurons sensitive to interaural delay, we found that preferred delay also varies with sound frequency. Similar observations reported earlier were not incorporated in a functional framework. We find that the frequency dependence of acoustical and physiological interaural delays are matched in key respects. This suggests that binaural neurons are tuned to acoustical features of ecological environments, rather than to fixed interaural delays. Using recordings from the nerve and brainstem we show that this tuning may emerge from neurons detecting coincidences between input fibers that are mistuned in frequency. |
| first_indexed | 2024-04-12T01:59:12Z |
| format | Article |
| id | doaj.art-62d7882d6b6b4b41b375907f3de6d1d7 |
| institution | Directory Open Access Journal |
| issn | 2050-084X |
| language | English |
| last_indexed | 2024-04-12T01:59:12Z |
| publishDate | 2015-04-01 |
| publisher | eLife Sciences Publications Ltd |
| record_format | Article |
| series | eLife |
| spelling | doaj.art-62d7882d6b6b4b41b375907f3de6d1d72022-12-22T03:52:44ZengeLife Sciences Publications LtdeLife2050-084X2015-04-01410.7554/eLife.06072Neural tuning matches frequency-dependent time differences between the earsVictor Benichoux0Bertrand Fontaine1Tom P Franken2Shotaro Karino3Philip X Joris4https://orcid.org/0000-0002-9759-5375Romain Brette5Institut d'Etudes de la Cognition, Ecole Normale Supérieure, Paris, France; Université Pierre-et-Marie-Curie, UMR_S 968, Institut de la Vision, Sorbonne Universités, Paris, France; U968, Institut de la Vision, Institut National de la Santé et de la Recherche Médicale, Paris, France; UMR_7210, École des Neurosciences de Paris Île-de-France, Centre National de la Recherche Scientifique, Paris, FranceDominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, New York, United States; Laboratory of Auditory Neurophysiology, University of Leuven, Leuven, BelgiumLaboratory of Auditory Neurophysiology, University of Leuven, Leuven, BelgiumLaboratory of Auditory Neurophysiology, University of Leuven, Leuven, Belgium; Department of Otolaryngology, Faculty of Medicine, University of Tokyo, Tokyo, JapanLaboratory of Auditory Neurophysiology, University of Leuven, Leuven, BelgiumInstitut d'Etudes de la Cognition, Ecole Normale Supérieure, Paris, France; Université Pierre-et-Marie-Curie, UMR_S 968, Institut de la Vision, Sorbonne Universités, Paris, France; U968, Institut de la Vision, Institut National de la Santé et de la Recherche Médicale, Paris, France; UMR_7210, École des Neurosciences de Paris Île-de-France, Centre National de la Recherche Scientifique, Paris, FranceThe time it takes a sound to travel from source to ear differs between the ears and creates an interaural delay. It varies systematically with spatial direction and is generally modeled as a pure time delay, independent of frequency. In acoustical recordings, we found that interaural delay varies with frequency at a fine scale. In physiological recordings of midbrain neurons sensitive to interaural delay, we found that preferred delay also varies with sound frequency. Similar observations reported earlier were not incorporated in a functional framework. We find that the frequency dependence of acoustical and physiological interaural delays are matched in key respects. This suggests that binaural neurons are tuned to acoustical features of ecological environments, rather than to fixed interaural delays. Using recordings from the nerve and brainstem we show that this tuning may emerge from neurons detecting coincidences between input fibers that are mistuned in frequency.https://elifesciences.org/articles/06072electrophysiologyauditory brainstemcat |
| spellingShingle | Victor Benichoux Bertrand Fontaine Tom P Franken Shotaro Karino Philip X Joris Romain Brette Neural tuning matches frequency-dependent time differences between the ears eLife electrophysiology auditory brainstem cat |
| title | Neural tuning matches frequency-dependent time differences between the ears |
| title_full | Neural tuning matches frequency-dependent time differences between the ears |
| title_fullStr | Neural tuning matches frequency-dependent time differences between the ears |
| title_full_unstemmed | Neural tuning matches frequency-dependent time differences between the ears |
| title_short | Neural tuning matches frequency-dependent time differences between the ears |
| title_sort | neural tuning matches frequency dependent time differences between the ears |
| topic | electrophysiology auditory brainstem cat |
| url | https://elifesciences.org/articles/06072 |
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