Brain Structures and Cognitive Abilities Important for the Self-Monitoring of Speech Errors

The brain structures and cognitive abilities necessary for successful monitoring of one’s own speech errors remain unknown. We aimed to inform self-monitoring models by examining the neural and behavioral correlates of phonological and semantic error detection in individuals with post-stroke aphasia...

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Bibliographic Details
Published in:Neurobiology of language 2020-01, Vol.1 (3), p.0-0
Main Authors: Mandal, Ayan Sankar, Fama, Mackenzie E., Skipper-Kallal, Laura M., DeMarco, Andrew T., Lacey, Elizabeth H., Turkeltaub, Peter E.
Format: Article
Language:English
Subjects:
Aphasia
Auditory system
Brain
Cognition
Cognitive ability
conflict monitoring
Error analysis
Error correction & detection
Executive function
Fluency
frontal white matter
Lesions
Listening comprehension
Localization
Phonology
Prefrontal cortex
RESEARCH ARTICLE
self-monitoring
Semantics
Speech
Speech errors
Speech production
Stroke
Substantia alba
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Summary:The brain structures and cognitive abilities necessary for successful monitoring of one’s own speech errors remain unknown. We aimed to inform self-monitoring models by examining the neural and behavioral correlates of phonological and semantic error detection in individuals with post-stroke aphasia. First, we determined whether detection related to other abilities proposed to contribute to monitoring according to various theories, including naming ability, fluency, word-level auditory comprehension, sentence-level auditory comprehension, and executive function. Regression analyses revealed that fluency and executive scores were independent predictors of phonological error detection, while a measure of word-level comprehension related to semantic error detection. Next, we used multivariate lesion-symptom mapping to determine lesion locations associated with reduced error detection. Reduced overall error detection related to damage to a region of frontal white matter extending into dorsolateral prefrontal cortex (DLPFC). Detection of phonological errors related to damage to the same areas, but the lesion-behavior association was stronger, suggesting that the localization for overall error detection was driven primarily by phonological error detection. These findings demonstrate that monitoring of different error types relies on distinct cognitive functions, and provide causal evidence for the importance of frontal white matter tracts and the DLPFC for self-monitoring of speech.
ISSN:2641-4368
2641-4368
DOI:10.1162/nol_a_00015