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- Publisher Website: 10.1016/j.cortex.2021.09.008
- Scopus: eid_2-s2.0-85117946835
- PMID: 34717269
- WOS: WOS:000721562900009
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Article: Disruption of speech motor adaptation with repetitive transcranial magnetic stimulation of the articulatory representation in primary motor cortex
Title | Disruption of speech motor adaptation with repetitive transcranial magnetic stimulation of the articulatory representation in primary motor cortex |
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Authors | |
Keywords | Auditory feedback perturbation Sensorimotor adaptation Speech motor control Speech perception TMS |
Issue Date | 2021 |
Citation | Cortex, 2021, v. 145, p. 115-130 How to Cite? |
Abstract | When auditory feedback perturbation is introduced in a predictable way over a number of utterances, speakers learn to compensate by adjusting their own productions, a process known as sensorimotor adaptation. Despite multiple lines of evidence indicating the role of primary motor cortex (M1) in motor learning and memory, whether M1 causally contributes to sensorimotor adaptation in the speech domain remains unclear. Here, we aimed to assay whether temporary disruption of the articulatory representation in left M1 by repetitive transcranial magnetic stimulation (rTMS) impairs speech adaptation. To induce sensorimotor adaptation, the frequencies of first formants (F1) were shifted up and played back to participants when they produced “head”, “bed”, and “dead” repeatedly (the learning phase). A low-frequency rTMS train (.6 Hz, subthreshold, 12 min) over either the tongue or the hand representation of M1 (between-subjects design) was applied before participants experienced altered auditory feedback in the learning phase. We found that the group who received rTMS over the hand representation showed the expected compensatory response for the upwards shift in F1 by significantly reducing F1 and increasing the second formant (F2) frequencies in their productions. In contrast, these expected compensatory changes in both F1 and F2 did not occur in the group that received rTMS over the tongue representation. Critically, rTMS (subthreshold) over the tongue representation did not affect vowel production, which was unchanged from baseline. These results provide direct evidence that the articulatory representation in left M1 causally contributes to sensorimotor learning in speech. Furthermore, these results also suggest that M1 is critical to the network supporting a more global adaptation that aims to move the altered speech production closer to a learnt pattern of speech production used to produce another vowel. |
Persistent Identifier | http://hdl.handle.net/10722/334789 |
ISSN | 2023 Impact Factor: 3.2 2023 SCImago Journal Rankings: 1.330 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Tang, Ding Lan | - |
dc.contributor.author | McDaniel, Alexander | - |
dc.contributor.author | Watkins, Kate E. | - |
dc.date.accessioned | 2023-10-20T06:50:46Z | - |
dc.date.available | 2023-10-20T06:50:46Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Cortex, 2021, v. 145, p. 115-130 | - |
dc.identifier.issn | 0010-9452 | - |
dc.identifier.uri | http://hdl.handle.net/10722/334789 | - |
dc.description.abstract | When auditory feedback perturbation is introduced in a predictable way over a number of utterances, speakers learn to compensate by adjusting their own productions, a process known as sensorimotor adaptation. Despite multiple lines of evidence indicating the role of primary motor cortex (M1) in motor learning and memory, whether M1 causally contributes to sensorimotor adaptation in the speech domain remains unclear. Here, we aimed to assay whether temporary disruption of the articulatory representation in left M1 by repetitive transcranial magnetic stimulation (rTMS) impairs speech adaptation. To induce sensorimotor adaptation, the frequencies of first formants (F1) were shifted up and played back to participants when they produced “head”, “bed”, and “dead” repeatedly (the learning phase). A low-frequency rTMS train (.6 Hz, subthreshold, 12 min) over either the tongue or the hand representation of M1 (between-subjects design) was applied before participants experienced altered auditory feedback in the learning phase. We found that the group who received rTMS over the hand representation showed the expected compensatory response for the upwards shift in F1 by significantly reducing F1 and increasing the second formant (F2) frequencies in their productions. In contrast, these expected compensatory changes in both F1 and F2 did not occur in the group that received rTMS over the tongue representation. Critically, rTMS (subthreshold) over the tongue representation did not affect vowel production, which was unchanged from baseline. These results provide direct evidence that the articulatory representation in left M1 causally contributes to sensorimotor learning in speech. Furthermore, these results also suggest that M1 is critical to the network supporting a more global adaptation that aims to move the altered speech production closer to a learnt pattern of speech production used to produce another vowel. | - |
dc.language | eng | - |
dc.relation.ispartof | Cortex | - |
dc.subject | Auditory feedback perturbation | - |
dc.subject | Sensorimotor adaptation | - |
dc.subject | Speech motor control | - |
dc.subject | Speech perception | - |
dc.subject | TMS | - |
dc.title | Disruption of speech motor adaptation with repetitive transcranial magnetic stimulation of the articulatory representation in primary motor cortex | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.cortex.2021.09.008 | - |
dc.identifier.pmid | 34717269 | - |
dc.identifier.scopus | eid_2-s2.0-85117946835 | - |
dc.identifier.volume | 145 | - |
dc.identifier.spage | 115 | - |
dc.identifier.epage | 130 | - |
dc.identifier.eissn | 1973-8102 | - |
dc.identifier.isi | WOS:000721562900009 | - |