Oral electromyography activation patterns for speech are similar in preschoolers who do and do not stutter.
نویسندگان
چکیده
PURPOSE In this study, the authors determined whether basic patterns of muscle activation for speech were similar in preschool children who stutter and in their fluent peers. METHOD Right and left lower lip muscle activity were recorded during conversational speech and sentence repetition in 64 preschool children diagnosed as stuttering (CWS) and in 40 children who do not stutter (CWNS). Measures of electromyography (EMG) amplitude, right-left asymmetry, and bilateral coordination were computed for fluent speech. The potential presence of tremor-like oscillations during disfluencies of CWS was assessed, and EMG amplitudes of fluent and disfluent speech were compared in CWS. RESULTS Across both speaking tasks, lip muscle activation was similar in CWS and CWNS in overall amplitude, bilateral synchrony, and degree of right-left asymmetry. EMG amplitude was reduced during disfluent compared with fluent conversational speech of CWS, and there was no evidence of tremor in the disfluencies of CWS. CONCLUSION These results support the assertion that stuttering in young children arises not from basic features of muscle contraction but rather from the command signals that control the timing and amplitude of muscle activity. The results indicate that no frank abnormality is present in muscle activation patterns in preschoolers who stutter.
منابع مشابه
بررسی ویژگی‌های آکوستیکی مربوط به کنترل حرکتی گفتار در کودکان لکنتی و غیرلکنتی
Objective Stuttering is a developmental disorder of speech fluency with unknown causes. One of the proposed theories in this field is deficits in speech motor control that is associated with damaged control, timing, and coordination of the speech muscles. Fundamental frequency, fundamental frequency range, intensity, intensity range, and voice onset time are the most important acoustic componen...
متن کاملیادگیری توالی‌های حرکتی گفتار در بزرگ‌سالان مبتلا به لکنت
Objective Developmental stuttering is a speech disorder characterized by repetition, prolongation, block and disruption of the smooth flow of speech. Environmental, physical, mental, and cognitive-linguistic factors were involved in the initiation and development of stuttering. There have been several theories about the development of stuttering. One of these theories suggests that stuttering i...
متن کاملAcoustic analyses of diadochokinesis in fluent and stuttering children
OBJECTIVES The purpose of the study was to acoustically compare the performance of children who do and do not stutter on diadochokinesis tasks in terms of syllable duration, syllable periods, and peak intensity. METHODS In this case-control study, acoustical analyses were performed on 26 children who stutter and 20 aged-matched normally fluent children (both groups stratified into preschooler...
متن کاملComparison of different speech tasks among adults who stutter and adults who do not stutter
OBJECTIVES In this study, we compared the performance of both fluent speakers and people who stutter in three different speaking situations: monologue speech, oral reading and choral reading. This study follows the assumption that the neuromotor control of speech can be influenced by external auditory stimuli in both speakers who stutter and speakers who do not stutter. METHOD Seventeen adult...
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عنوان ژورنال:
- Journal of speech, language, and hearing research : JSLHR
دوره 56 5 شماره
صفحات -
تاریخ انتشار 2013