PMID: 9430757Feb 12, 1998Paper

Coordination of lip muscle activity by 2-year-old children during speech and nonspeech tasks

Journal of Speech, Language, and Hearing Research : JSLHR
J L Ruark, C A Moore

Abstract

This investigation was designed to quantify the coordinative organization of lip muscle activity of 2-year-old children during speech and nonspeech behaviors. Electromyographic (EMG) recordings of right upper and lower lip activity of seven 2-year-old children were obtained during productions of chewing, syllable repetition, lip protrusion, and speech (repeated two-word utterances) tasks. Task comparisons revealed that the coordinative organization of upper and lower lip activity is task specific; different coordinative strategies are employed for different tasks. Lip protrusion and syllable repetition tasks yielded strong coupling of upper and lower lip activity. Lip rounding (sentences containing the lip-rounding vowel /u/) and "nonlabial" speech tasks (sentences free of bilabials and lip-rounding vowels) resulted in low coupling of upper and lower lip activity. Moderate levels of coupling of upper and lower lip activity were evident for chewing and bilabial speech tasks (sentences loaded with bilabial plosion). This finding, that the coordinative elements of the perioral system of 2-year-olds are task specific, extends the results of previous studies of adults and children, where task-specific coordinative strategies were em...Continue Reading

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Citations

Nov 19, 2013·Neuroscience and Biobehavioral Reviews·Luigi Cattaneo, Giovanni Pavesi
May 27, 2006·Clinical Linguistics & Phonetics·Gary Weismer
Jul 16, 2005·Clinical Linguistics & Phonetics·Susan RvachewReg Sauve
Aug 18, 2010·Developmental Science·Katherine J Alcock, Kirsty Krawczyk
Jul 1, 2009·Language, Speech, and Hearing Services in Schools·Maggie M Watson, Gregory L Lof
Oct 22, 2008·American Journal of Speech-language Pathology·Laura S DeThorneJamie Mahurin-Smith
Oct 17, 2006·Language, Speech, and Hearing Services in Schools·Alan G Kamhi
Jan 11, 2012·Journal of Speech, Language, and Hearing Research : JSLHR·Cara E Stepp
Feb 24, 2001·Journal of Speech, Language, and Hearing Research : JSLHR·C A MooreJ R Green
Jul 11, 2013·Journal of Speech, Language, and Hearing Research : JSLHR·Bridget Walsh, Anne Smith
Jul 4, 2008·Language, Speech, and Hearing Services in Schools·Dennis M Ruscello
Jul 4, 2008·Language, Speech, and Hearing Services in Schools·Thomas W Powell
Apr 10, 2004·Journal of Speech, Language, and Hearing Research : JSLHR·Kathryn P ConnaghanMasahiko Higashakawa
Jul 31, 2014·Journal of Speech, Language, and Hearing Research : JSLHR·Jennell C VickChristopher A Moore
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Feb 11, 2020·Folia Phoniatrica Et Logopaedica : Official Organ of the International Association of Logopedics and Phoniatrics (IALP)·Samantha BurrToity Deave

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