Spontaneous variability predicts compensative motor response in vocal pitch control
Abstract Our motor system uses sensory feedback to keep desired performance. From this view, motor fluctuation is not simply ‘noise’ inevitably caused in the nervous system but would play a role in generating variations to explore better outcomes via sensory feedback. Vocalization system offers a go...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2022-10-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-22453-0 |
| _version_ | 1798028628860076032 |
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| author | Ryosuke O. Tachibana Mingdi Xu Ryu-ichiro Hashimoto Fumitaka Homae Kazuo Okanoya |
| author_facet | Ryosuke O. Tachibana Mingdi Xu Ryu-ichiro Hashimoto Fumitaka Homae Kazuo Okanoya |
| author_sort | Ryosuke O. Tachibana |
| collection | DOAJ |
| description | Abstract Our motor system uses sensory feedback to keep desired performance. From this view, motor fluctuation is not simply ‘noise’ inevitably caused in the nervous system but would play a role in generating variations to explore better outcomes via sensory feedback. Vocalization system offers a good model for studying such sensory-motor interactions since we regulate vocalization by hearing our own voice. This behavior is typically observed as compensatory responses in vocalized pitch, or fundamental frequency (f o), when artificial f o shifts were induced in the auditory feedback. However, the relationship between adaptive regulation and motor exploration in vocalization has remained unclear. Here we investigated behavioral variability in spontaneous vocal f o and compensatory responses against f o shifts in the feedback, and demonstrated that larger spontaneous fluctuation correlates with greater compensation in vocal f o. This correlation was found in slow components (≤ 5 Hz) of the spontaneous fluctuation but not in fast components (between 6 and 30 Hz), and the slow one was amplified during the compensatory responses. Furthermore, the compensatory ratio was reduced when large f o shifts were applied to the auditory feedback, as if reflecting the range of motor exploration. All these findings consistently suggest the functional role of motor variability in the exploration of better vocal outcomes. |
| first_indexed | 2024-04-11T19:11:01Z |
| format | Article |
| id | doaj.art-a5bda6153d194933ad030ba5ff76cc83 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-11T19:11:01Z |
| publishDate | 2022-10-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-a5bda6153d194933ad030ba5ff76cc832022-12-22T04:07:37ZengNature PortfolioScientific Reports2045-23222022-10-0112111110.1038/s41598-022-22453-0Spontaneous variability predicts compensative motor response in vocal pitch controlRyosuke O. Tachibana0Mingdi Xu1Ryu-ichiro Hashimoto2Fumitaka Homae3Kazuo Okanoya4Center for Evolutionary Cognitive Sciences, The University of TokyoGlobal Research Institute, Keio UniversityDepartment of Language Sciences, Graduate School of Humanities, Tokyo Metropolitan UniversityDepartment of Language Sciences, Graduate School of Humanities, Tokyo Metropolitan UniversityCenter for Evolutionary Cognitive Sciences, The University of TokyoAbstract Our motor system uses sensory feedback to keep desired performance. From this view, motor fluctuation is not simply ‘noise’ inevitably caused in the nervous system but would play a role in generating variations to explore better outcomes via sensory feedback. Vocalization system offers a good model for studying such sensory-motor interactions since we regulate vocalization by hearing our own voice. This behavior is typically observed as compensatory responses in vocalized pitch, or fundamental frequency (f o), when artificial f o shifts were induced in the auditory feedback. However, the relationship between adaptive regulation and motor exploration in vocalization has remained unclear. Here we investigated behavioral variability in spontaneous vocal f o and compensatory responses against f o shifts in the feedback, and demonstrated that larger spontaneous fluctuation correlates with greater compensation in vocal f o. This correlation was found in slow components (≤ 5 Hz) of the spontaneous fluctuation but not in fast components (between 6 and 30 Hz), and the slow one was amplified during the compensatory responses. Furthermore, the compensatory ratio was reduced when large f o shifts were applied to the auditory feedback, as if reflecting the range of motor exploration. All these findings consistently suggest the functional role of motor variability in the exploration of better vocal outcomes.https://doi.org/10.1038/s41598-022-22453-0 |
| spellingShingle | Ryosuke O. Tachibana Mingdi Xu Ryu-ichiro Hashimoto Fumitaka Homae Kazuo Okanoya Spontaneous variability predicts compensative motor response in vocal pitch control Scientific Reports |
| title | Spontaneous variability predicts compensative motor response in vocal pitch control |
| title_full | Spontaneous variability predicts compensative motor response in vocal pitch control |
| title_fullStr | Spontaneous variability predicts compensative motor response in vocal pitch control |
| title_full_unstemmed | Spontaneous variability predicts compensative motor response in vocal pitch control |
| title_short | Spontaneous variability predicts compensative motor response in vocal pitch control |
| title_sort | spontaneous variability predicts compensative motor response in vocal pitch control |
| url | https://doi.org/10.1038/s41598-022-22453-0 |
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