Eira Jansson-Verkasalo1, Kurt Eggers2, Anu Järvenpää3, Kalervo Suominen4, Bea Van den Bergh5, Luc De Nil6, Teija Kujala7. 1. Department of Behavioural Sciences and Philosophy, Logopedics, University of Turku, Finland; Department of Clinical Neurophysiology, Oulu University Hospital, Finland. Electronic address: eira.jansson-verkasalo@utu.fi. 2. Department of Speech-Language Therapy and Audiology, Thomas More University College Antwerp, Belgium. Electronic address: kurt.eggers@thomasmore.be. 3. Department of Clinical Neurophysiology, Oulu University Hospital, Finland. Electronic address: anujarve84@gmail.com. 4. Department of Clinical Neurophysiology, Oulu University Hospital, Finland. Electronic address: vlkalervo.suominen@gmail.com. 5. Department of Psychology, Tilburg University, The Netherlands; Department of Psychology, University of Leuven, Belgium. Electronic address: Bea.vdnBergh@uvt.nl. 6. School of Graduate Studies, University of Toronto, Canada; Experimental Otorinolaryngology, Department of Neurosciences, University of Leuven, Belgium. Electronic address: luc.denil@sgs.utoronto.ca. 7. Cicero Learning, University of Helsinki, Helsinki, Finland; Cognitive Brain Research Unit, Institute of Behavioural Sciences, University of Helsinki, Finland. Electronic address: Teija.m.kujala@helsinki.fi.
Abstract
PURPOSE: Recent theoretical conceptualizations suggest that disfluencies in stuttering may arise from several factors, one of them being atypical auditory processing. The main purpose of the present study was to investigate whether speech sound encoding and central auditory discrimination, are affected in children who stutter (CWS). METHODS: Participants were 10 CWS, and 12 typically developing children with fluent speech (TDC). Event-related potentials (ERPs) for syllables and syllable changes [consonant, vowel, vowel-duration, frequency (F0), and intensity changes], critical in speech perception and language development of CWS were compared to those of TDC. RESULTS: There were no significant group differences in the amplitudes or latencies of the P1 or N2 responses elicited by the standard stimuli. However, the Mismatch Negativity (MMN) amplitude was significantly smaller in CWS than in TDC. For TDC all deviants of the linguistic multifeature paradigm elicited significant MMN amplitudes, comparable with the results found earlier with the same paradigm in 6-year-old children. In contrast, only the duration change elicited a significant MMN in CWS. CONCLUSIONS: The results showed that central auditory speech-sound processing was typical at the level of sound encoding in CWS. In contrast, central speech-sound discrimination, as indexed by the MMN for multiple sound features (both phonetic and prosodic), was atypical in the group of CWS. Findings were linked to existing conceptualizations on stuttering etiology. EDUCATIONAL OBJECTIVES: The reader will be able (a) to describe recent findings on central auditory speech-sound processing in individuals who stutter, (b) to describe the measurement of auditory reception and central auditory speech-sound discrimination, (c) to describe the findings of central auditory speech-sound discrimination, as indexed by the mismatch negativity (MMN), in children who stutter.
PURPOSE: Recent theoretical conceptualizations suggest that disfluencies in stuttering may arise from several factors, one of them being atypical auditory processing. The main purpose of the present study was to investigate whether speech sound encoding and central auditory discrimination, are affected in children who stutter (CWS). METHODS:Participants were 10 CWS, and 12 typically developing children with fluent speech (TDC). Event-related potentials (ERPs) for syllables and syllable changes [consonant, vowel, vowel-duration, frequency (F0), and intensity changes], critical in speech perception and language development of CWS were compared to those of TDC. RESULTS: There were no significant group differences in the amplitudes or latencies of the P1 or N2 responses elicited by the standard stimuli. However, the Mismatch Negativity (MMN) amplitude was significantly smaller in CWS than in TDC. For TDC all deviants of the linguistic multifeature paradigm elicited significant MMN amplitudes, comparable with the results found earlier with the same paradigm in 6-year-old children. In contrast, only the duration change elicited a significant MMN in CWS. CONCLUSIONS: The results showed that central auditory speech-sound processing was typical at the level of sound encoding in CWS. In contrast, central speech-sound discrimination, as indexed by the MMN for multiple sound features (both phonetic and prosodic), was atypical in the group of CWS. Findings were linked to existing conceptualizations on stuttering etiology. EDUCATIONAL OBJECTIVES: The reader will be able (a) to describe recent findings on central auditory speech-sound processing in individuals who stutter, (b) to describe the measurement of auditory reception and central auditory speech-sound discrimination, (c) to describe the findings of central auditory speech-sound discrimination, as indexed by the mismatch negativity (MMN), in children who stutter.
Authors: Tim Saltuklaroglu; Ashley W Harkrider; David Thornton; David Jenson; Tiffani Kittilstved Journal: Neuroimage Date: 2017-04-09 Impact factor: 6.556
Authors: Soo-Eun Chang; Michael Angstadt; Ho Ming Chow; Andrew C Etchell; Emily O Garnett; Ai Leen Choo; Daniel Kessler; Robert C Welsh; Chandra Sripada Journal: J Fluency Disord Date: 2017-01-25 Impact factor: 2.538