Abnormal speech sound representation in persistent developmental stuttering

Sílvia Corbera · María José Corral · Carles Escera · Ma Ángeles Idiazábal

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Stuttering Research and Treatment Language Development and Disorders Neurobiology of Language and Bilingualism

Abstract

OBJECTIVES: To determine whether adults with persistent developmental stuttering (PDS) have auditory perceptual deficits. METHODS: The authors compared the mismatch negativity (MMN) event-related brain potential elicited to simple tone (frequency and duration) and phonetic contrasts in a sample of PDS subjects with that recorded in a sample of paired fluent control subjects. RESULTS: Subjects with developmental stuttering had normal MMN to simple tone contrasts but a significant supratemporal left-lateralized enhancement of this electrophysiologic response to phonetic contrasts. In addition, the enhanced MMN correlated positively with speech disfluency as self-rated by the subjects. CONCLUSIONS: Individuals with persistent developmental stuttering have abnormal permanent traces for speech sounds, and their abnormal speech sound representation may underlie their speech disorder. The link between abnormal speech neural traces of the auditory cortex and speech disfluency supports the relevance of speech perception mechanisms to speech production.

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References

2013Diagnostic and Statistical Manual of Mental Disorders 2003Diagnostic and Statistical Manual of Mental Disorders (DSM-IV)1985The motor theory of speech perception revised 1969A handbook on stuttering 1998Development of language-specific phoneme representations in the infant brain 1996A PET study of the neural systems of stuttering 2002Disconnection of speech-relevant brain areas in persistent developmental stuttering 1999Brain responses reveal the learning of foreign language phonemes

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2014Atypical central auditory speech-sound discrimination in children who stutter as indexed by the mismatch negativity 2015The trajectory of gray matter development in Broca’s area is abnormal in people who stutter 2010Non-Linguistic Auditory Processing and Working Memory Update in Pre-School Children Who Stutter: An Electrophysiological Study 2012Neural anomaly and reorganization in speakers who stutter

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