Listening to Yourself and Watching Your Tongue: Distinct Abilities and Brain Regions for Monitoring Semantic and Phonological Speech Errors

摘要

Despite the many mistakes we make while speaking, peoplecan effectively communicate because we monitor our speecherrors. However, the cognitive abilities and brain structures thatsupport speech error monitoring are unclear. There may be differentabilities and brain regions that support monitoring phonologicalspeech errors versus monitoring semantic speecherrors. We investigated speech, language, and cognitive controlabilities that relate to detecting phonological and semanticspeech errors in 41 individuals with aphasia who underwentdetailed cognitive testing. Then, we used support vector regressionlesion symptom mapping to identify brain regions supportingdetection of phonological versus semantic errors in a groupof 76 individuals with aphasia. The results revealed that motorspeech deficits as well as lesions to the ventral motor cortexwere related to reduced detection of phonological errors relativeto semantic errors. Detection of semantic errors selectivelyrelated to auditory word comprehension deficits. Across allerror types, poor cognitive control related to reduced detection.We conclude that monitoring of phonological and semanticerrors relies on distinct cognitive abilities and brain regions.Furthermore, we identified cognitive control as a shared cognitivebasis for monitoring all types of speech errors. Thesefindings refine and expand our understanding of the neurocognitivebasis of speech error monitoring.