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Hits 1 – 2 of 2
1
Auditory feedback control mechanisms do not contribute to cortical hyperactivity within the voice production network in adductor spasmodic dysphonia
Burns, James
;
Nieto-Castanon, Alfonso
;
Daliri, Ayoub
;
Elizabeth, Heller Murray
;
Noordzij, J. Pieter
;
Guenther, Frank
;
Tourville, Jason
;
Blood, Anne
. - : American Speech-Language-Hearing Association, 2020
Abstract:
Adductor spasmodic dysphonia (ADSD), the most common form of spasmodic dysphonia, is a debilitating voice disorder characterized by hyperactivity and muscle spasms in the vocal folds during speech. Prior neuroimaging studies have noted excessive brain activity during speech in ADSD participants compared to controls. Speech involves an auditory feedback control mechanism that generates motor commands aimed at eliminating disparities between desired and actual auditory signals. Thus, excessive neural activity in ADSD during speech may reflect, at least in part, increased engagement of the auditory feedback control mechanism as it attempts to correct vocal production errors detected through audition. To test this possibility, functional magnetic resonance imaging was used to identify differences between ADSD participants and age-matched controls in (i) brain activity when producing speech under different auditory feedback conditions, and (ii) resting state functional connectivity within the cortical network responsible for vocalization. The ADSD group had significantly higher activity than the control group during speech (compared to a silent baseline task) in three left-hemisphere cortical regions: ventral Rolandic (sensorimotor) cortex, anterior planum temporale, and posterior superior temporal gyrus/planum temporale. This was true for speech while auditory feedback was masked with noise as well as for speech with normal auditory feedback, indicating that the excess activity was not the result of auditory feedback control mechanisms attempting to correct for perceived voicing errors in ADSD. Furthermore, the ADSD group had significantly higher resting state functional connectivity between sensorimotor and auditory cortical regions within the left hemisphere as well as between the left and right hemispheres, consistent with the view that excessive motor activity frequently co-occurs with increased auditory cortical activity in individuals with ADSD. ; First author draft
Keyword:
Auditory feedback
;
Clinical sciences
;
Cognitive sciences
;
Feedforward
;
Linguistics
;
Spasmodic dysphonia
;
Speech-language pathology & audiology
;
Voice
URL:
https://hdl.handle.net/2144/40173
https://doi.org/10.1044/2019_JSLHR-19-00325
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2
SimpleDIVA: A 3-parameter model for examining adaptation in speech and voice production
Kearney, Elaine
;
Nieto-Castanon, Alfonso
;
Daliri, Ayoub
. - 2019
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