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

Luthra, Sahil; Mechtenberg, Hannah; Giorio, Cristal; Theodore, Rachel M.; Magnuson, James S.; Myers, Emily B.

doi:10.1016/j.bandl.2023.105264

Cited by 1 publication

(1 citation statement)

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“…2011 ; Krieger-Redwood et al. 2013 ; Luthra et al. 2023 ), as well as the involvement of homologous regions elsewhere in the brain ( Andoh and Paus 2011 ; Hartwigsen et al.…”

Section: Introductionmentioning

confidence: 99%

Perceiving and misperceiving speech: lexical and sublexical processing in the superior temporal lobes

Tolkacheva,

Brownsett,

McMahon

et al. 2024

Cerebral Cortex

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Listeners can use prior knowledge to predict the content of noisy speech signals, enhancing perception. However, this process can also elicit misperceptions. For the first time, we employed a prime–probe paradigm and transcranial magnetic stimulation to investigate causal roles for the left and right posterior superior temporal gyri (pSTG) in the perception and misperception of degraded speech. Listeners were presented with spectrotemporally degraded probe sentences preceded by a clear prime. To produce misperceptions, we created partially mismatched pseudo-sentence probes via homophonic nonword transformations (e.g. The little girl was excited to lose her first tooth—Tha fittle girmn wam expited du roos har derst cooth). Compared to a control site (vertex), inhibitory stimulation of the left pSTG selectively disrupted priming of real but not pseudo-sentences. Conversely, inhibitory stimulation of the right pSTG enhanced priming of misperceptions with pseudo-sentences, but did not influence perception of real sentences. These results indicate qualitatively different causal roles for the left and right pSTG in perceiving degraded speech, supporting bilateral models that propose engagement of the right pSTG in sublexical processing.

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“…2011 ; Krieger-Redwood et al. 2013 ; Luthra et al. 2023 ), as well as the involvement of homologous regions elsewhere in the brain ( Andoh and Paus 2011 ; Hartwigsen et al.…”

Section: Introductionmentioning

confidence: 99%