Atypical central auditory speech-sound discrimination in children who stutter as indexed by the mismatch negativity |
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| Institution: | 1. Department of Behavioural Sciences and Philosophy, Logopedics, University of Turku, Finland;2. Department of Clinical Neurophysiology, Oulu University Hospital, Finland;3. Department of Speech-Language Therapy and Audiology, Thomas More University College Antwerp, Belgium;4. Department of Psychology, Tilburg University, The Netherlands;5. Department of Psychology, University of Leuven, Belgium;6. School of Graduate Studies, University of Toronto, Canada;7. Experimental Otorinolaryngology, Department of Neurosciences, University of Leuven, Belgium;8. Cicero Learning, University of Helsinki, Helsinki, Finland;9. Cognitive Brain Research Unit, Institute of Behavioural Sciences, University of Helsinki, Finland;1. Department of Internal Medicine, Neurology, Ghent University, Ghent University Hospital, De Pintelaan 185, 1K12A, B-9000 Ghent, Belgium;2. Department of Neurology, Ghent University Hospital, De Pintelaan 185, 1K12A, B-9000 Ghent, Belgium;3. Department of Speech, Language and Hearing Sciences, Ghent University, Ghent University Hospital, De Pintelaan 185, 2P1, B-9000 Ghent, Belgium;4. MEDISIP, Department of Electronics and Information Systems, Ghent University–iMINDS Medical IT Department, Ghent University Hospital, 185, 5-Blok B, B-9000 Ghent, Belgium;5. Department of Physical Therapy and Motor Rehabilitation, Ghent University Hospital, De Pintelaan 185, B-9000 Ghent, Belgium;6. Faculty of Education, Health and Social Work, University College Ghent, Keramiekstraat 80, B-9000 Ghent, Belgium;1. Department of Speech-Language Pathology, University of Toronto, Toronto, ON, Canada;2. Program in Neurosciences and Mental Health, Hospital for Sick Children Research Institute, Toronto, Ontario M5G 0A4, Canada;3. Department of Medical Imaging, University of Toronto, Toronto, Ontario M5T 1W7, Canada;1. The University of Texas at Austin, United States;2. Purdue University, United States;1. John Walsh Centre for Rehabilitation Research, Kolling Institute of Medical Research, Sydney Medical School-Northern, The University of Sydney, St Leonards, 2065 NSW, Australia;2. Key University Centre for Health Technologies, University of Technology, Sydney, Broadway, NSW 2007, Australia |
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| Abstract: | PurposeRecent 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).MethodsParticipants 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.ResultsThere 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.ConclusionsThe 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. |
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| Keywords: | Stuttering Central speech-sound discrimination Event-related potential Mismatch negativity Children |
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