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Motor unit territories in the human perioral musculature.
Goffman L, Smith A. Goffman L, et al. Among authors: smith a. J Speech Hear Res. 1994 Oct;37(5):975-84. doi: 10.1044/jshr.3705.975. J Speech Hear Res. 1994. PMID: 7823565
When two pairs of electrodes were intentionally placed to record the activity from a common subset of motor units in a single quadrant of the lower lip, all subjects exhibited significant broad-band coherence in every frequency in all experimental tasks. Thus, the p …
When two pairs of electrodes were intentionally placed to record the activity from a common subset of motor units in a single …
How Stuttering Develops: The Multifactorial Dynamic Pathways Theory.
Smith A, Weber C. Smith A, et al. J Speech Lang Hear Res. 2017 Sep 18;60(9):2483-2505. doi: 10.1044/2017_JSLHR-S-16-0343. J Speech Lang Hear Res. 2017. PMID: 28837728 Free PMC article. Review.
PURPOSE: We advanced a multifactorial, dynamic account of the complex, nonlinear interactions of motor, linguistic, and emotional factors contributing to the development of stuttering. ...Rapid changes in many neurobehavioral systems are ongoing, and critical interactions …
PURPOSE: We advanced a multifactorial, dynamic account of the complex, nonlinear interactions of motor, linguistic, and emotional fac …
Age differences in speech motor performance on a novel speech task.
Sadagopan N, Smith A. Sadagopan N, et al. Among authors: smith a. J Speech Lang Hear Res. 2013 Oct;56(5):1552-66. doi: 10.1044/1092-4388(2013/12-0293). Epub 2013 Sep 10. J Speech Lang Hear Res. 2013. PMID: 24023373
PURPOSE: The study was aimed at characterizing age-related changes in speech motor performance on a nonword repetition task as a function of practice and nonword length and complexity. ...
PURPOSE: The study was aimed at characterizing age-related changes in speech motor performance on a nonword repetition task as a
Oral electromyography activation patterns for speech are similar in preschoolers who do and do not stutter.
Walsh B, Smith A. Walsh B, et al. Among authors: smith a. J Speech Lang Hear Res. 2013 Oct;56(5):1441-54. doi: 10.1044/1092-4388(2013/12-0177). Epub 2013 Jul 9. J Speech Lang Hear Res. 2013. PMID: 23838991 Free PMC article.
Influences of sentence length and syntactic complexity on the speech motor control of children who stutter.
MacPherson MK, Smith A. MacPherson MK, et al. Among authors: smith a. J Speech Lang Hear Res. 2013 Feb;56(1):89-102. doi: 10.1044/1092-4388(2012/11-0184). Epub 2012 Apr 5. J Speech Lang Hear Res. 2013. PMID: 22490621 Free PMC article.
Behavioral data from a larger pool of children were also examined. RESULTS: For both groups, articulatory coordination variability increased with sentence length. ...There was a trend for higher overall coordination variability in CWS compared with CTD. For both gro …
Behavioral data from a larger pool of children were also examined. RESULTS: For both groups, articulatory coordination variability in …
Autonomic correlates of speech versus nonspeech tasks in children and adults.
Arnold HS, MacPherson MK, Smith A. Arnold HS, et al. Among authors: smith a. J Speech Lang Hear Res. 2014 Aug;57(4):1296-307. doi: 10.1044/2014_JSLHR-S-12-0265. J Speech Lang Hear Res. 2014. PMID: 24686989 Free PMC article.
Children demonstrated sex differences in autonomic arousal; specifically, autonomic arousal remained high for school-age boys but not girls in a more complex open-ended narrative task that followed a simple sentence production task. ...
Children demonstrated sex differences in autonomic arousal; specifically, autonomic arousal remained high for school-age boys but not girls …
Evidence That Bimanual Motor Timing Performance Is Not a Significant Factor in Developmental Stuttering.
Hilger AI, Zelaznik H, Smith A. Hilger AI, et al. Among authors: smith a. J Speech Lang Hear Res. 2016 Aug 1;59(4):674-85. doi: 10.1044/2016_JSLHR-S-15-0172. J Speech Lang Hear Res. 2016. PMID: 27391252 Free PMC article.
METHOD: As an extension of Olander, Smith, and Zelaznik (2010), we measured bimanual motor timing performance in 115 children: 70 children who stutter (CWS) and 45 children who do not stutter (CWNS). ...We used a synchronization-continuation rhythmic timing paradigm …
METHOD: As an extension of Olander, Smith, and Zelaznik (2010), we measured bimanual motor timing performance in 115 children: 70 chi …
What Are Predictors for Persistence in Childhood Stuttering?
Walsh B, Usler E, Bostian A, Mohan R, Gerwin KL, Brown B, Weber C, Smith A. Walsh B, et al. Among authors: smith a. Semin Speech Lang. 2018 Sep;39(4):299-312. doi: 10.1055/s-0038-1667159. Epub 2018 Aug 24. Semin Speech Lang. 2018. PMID: 30142641 Free PMC article. Review.
In addition, we present new evidence that early delays in basic speech motor processes (especially in boys), poor performance on a nonword repetition test, stuttering severity at the age of 4 to 5 years, and delayed or atypical functioning in central nervous system languag …
In addition, we present new evidence that early delays in basic speech motor processes (especially in boys), poor performance on a no …
A Lag in Speech Motor Coordination During Sentence Production Is Associated With Stuttering Persistence in Young Children.
Usler E, Smith A, Weber C. Usler E, et al. Among authors: smith a. J Speech Lang Hear Res. 2017 Jan 1;60(1):51-61. doi: 10.1044/2016_JSLHR-S-15-0367. J Speech Lang Hear Res. 2017. PMID: 28056137 Free PMC article.
A kinematic measure of articulatory coordination, lip aperture variability (LAVar), and overall movement duration were computed for perceptually fluent sentence productions varying in length and syntactic complexity. ...However, a subset of CWS-Per failed to produce
A kinematic measure of articulatory coordination, lip aperture variability (LAVar), and overall movement duration were computed for p
Childhood Stuttering: Where Are We and Where Are We Going?
Smith A, Weber C. Smith A, et al. Semin Speech Lang. 2016 Nov;37(4):291-297. doi: 10.1055/s-0036-1587703. Epub 2016 Oct 4. Semin Speech Lang. 2016. PMID: 27701705 Free PMC article.
It is clear that stuttering is a neurodevelopmental disorder characterized by atypical development of speech motor planning and execution networks. ...
It is clear that stuttering is a neurodevelopmental disorder characterized by atypical development of speech motor planning and execu …
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