Using TMS to evaluate a causal role for right posterior temporal cortex in talker-specific phonetic processing.

Autor: Luthra S; University of Connecticut, United States. Electronic address: sahilluthra@cmu.edu., Mechtenberg H; University of Connecticut, United States., Giorio C; University of Connecticut, United States., Theodore RM; University of Connecticut, United States., Magnuson JS; University of Connecticut, United States; BCBL. Basque Center on Cognition Brain and Language, Donostia-San Sebastián, Spain; Ikerbasque, Basque Foundation for Science, Bilbao, Spain., Myers EB; University of Connecticut, United States.
Jazyk: angličtina
Zdroj: Brain and language [Brain Lang] 2023 May; Vol. 240, pp. 105264. Date of Electronic Publication: 2023 Apr 21.
DOI: 10.1016/j.bandl.2023.105264
Abstrakt: Theories suggest that speech perception is informed by listeners' beliefs of what phonetic variation is typical of a talker. A previous fMRI study found right middle temporal gyrus (RMTG) sensitivity to whether a phonetic variant was typical of a talker, consistent with literature suggesting that the right hemisphere may play a key role in conditioning phonetic identity on talker information. The current work used transcranial magnetic stimulation (TMS) to test whether the RMTG plays a causal role in processing talker-specific phonetic variation. Listeners were exposed to talkers who differed in how they produced voiceless stop consonants while TMS was applied to RMTG, left MTG, or scalp vertex. Listeners subsequently showed near-ceiling performance in indicating which of two variants was typical of a trained talker, regardless of previous stimulation site. Thus, even though the RMTG is recruited for talker-specific phonetic processing, modulation of its function may have only modest consequences.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 The Authors. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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