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Tungans muskelaktivitet vid stamning: En kvalitativ studie med elektromyografi
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Logopedi.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Logopedi.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Logopedi.
2019 (Swedish)Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Stuttering is a speech disorder which involves recurrent disruptions of the fluency of speech. Previous research has investigated movements of the tongue during stuttering, but this excludes answers regarding the underlying activity of the muscles. This study was created for two purposes: partly to investigate the role of the tongue in stuttering, partly to design a method suitable for observing this. EMG-electrodes were placed on the lips and tongue. The electrode placed on the tongue was attached with glue intended for the oral cavity, PeriAcryl. Using this method registrations were carried out, but many application attempts were required and low impedance was difficult to achieve. Registrations appeared to be stronger in the articulation of phonemes and syllables involving the front of the tongue. When processing collected data, new categories were designed in an attempt to augment the traditional, acoustically categorised core behaviours (i.e. repetitions, prolongations and blockages). The results in this study show that the tension of the tongue has a great influence on how and why occasions of stuttering occur. In several participants, elevated levels of static tension were registered which resulted in a blockage of the oral cavity, e.g. /d/. In other cases of blockage of the oral cavity, air passed through the nasal cavity, creating nasal sounds. Spreading of muscle tension between oral and facial muscles could be observed in a number of participants, which was also reflected in accessory movements (e.g. eye blinking, twitching and frowning). Low muscle tension was measured in occasions that could be described as insufficient articulation. Signs of tremor in the tongue were observed in one participant in this study. The method had several successful attempts and provided analysable measurements, but questions about its stability and the size of the group prevent generalisation of the results.

Abstract [sv]

Stamning är en talstörning som innebär återkommande avbrott i talflytet. Tidigare forskning har undersökt tungans rörelser vid stamning, men detta utelämnar svar kring musklernas faktiska aktivitet. Denna studie skapades med två syften: dels att undersöka tungans muskelspänning vid stamning, dels att utforma en metod lämplig för att observera detta. EMG-elektroder fästes på läppar och tunga. Elektroden på tungan fästes med ett lim avsett för applicering i munhålan, PeriAcryl. Med metoden som utformades uppmättes muskelspänning vid stamning men ofta krävdes flera appliceringsförsök och låg impedans var svår att uppnå. Registreringar föreföll vara starkast vid artikulation av fonem och stavelser involverande främre delen av tungan. Vid bearbetning av insamlade data utformades även nya kategorier för beskrivning av stamningstillfällen, i ett försök att fördjupa den traditionellt akustiska indelningen i repetitioner, förlängningar och blockeringar. Resultaten i denna studie indikerade att tungans spänning har stor påverkan i hur och varför tillfällen av stamning uppstår. Hos flera deltagare uppmättes höjda nivåer av statisk spänning som resulterade i en blockering av munhålan, till exempel vid /d/. Vid andra tillfällen när munhålan var blockerad av tungan passerade luften genom näshålan, vilket skapade nasala fonem. Spridning av spänning mellan muskler i munhåla och ansikte kunde observeras hos ett antal deltagare, vilket också avspeglades i synkroniserade medrörelser (till exempel blinkning, ryckning och grimasering). Låg muskelspänning uppmättes vid några stamningstillfällen, vilka kunde tolkas som otillräcklig artikulation. Tremor i tungan i samband med stamning observerades hos en deltagare i denna studie. Studien har belyst stamningens mekanismer men för vidare studier behöver metoden utvecklas för ytterligare stabilitet, och gruppens storlek begränsar möjligheten att generalisera resultaten.

Place, publisher, year, edition, pages
2019.
Series
Magisterarbete i logopedi ; 167
Keywords [en]
stuttering, tongue, EMG, PeriAcryl, method, design, core behaviours, stuttering categories, muscle tension
Keywords [sv]
stamning, tunga, EMG, PeriAcryl, metodutveckling, stamningssymptom, stamningskategorier, muskelspänning
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:uu:diva-374709OAI: oai:DiVA.org:uu-374709DiVA, id: diva2:1281807
Subject / course
Speech and Language Pathology
Educational program
Degree of Master of Science in Speech and Language Pathology
Supervisors
Examiners
Available from: 2019-01-23 Created: 2019-01-23 Last updated: 2019-01-23Bibliographically approved

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The full text will be freely available from 2020-01-23 12:00
Available from 2020-01-23 12:00

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