Persistent developmental stuttering as a cortical-subcortical dysfunction: evidence from muscle activation.
作者信息
Andrade Claudia Regina Furquim de, Sassi Fernanda Chiarion, Juste Fabiola, Mendonça Lucia Iracema Zanotto de
机构信息
Departament of Physiotherapy, Speech-Language and Hearing Sciences and Occupational Therapy, School of Medicine, University of São Paulo, São Paulo, SP, Brazil.
出版信息
Arq Neuropsiquiatr. 2008 Sep;66(3B):659-64. doi: 10.1590/s0004-282x2008000500010.
BACKGROUND
One contemporary view of stuttering posits that speech disfluencies arise from anomalous speech motor control.
PURPOSE
To verify the rest muscle tension and speech reaction time of fluent and stuttering adults.
METHOD
22 adults, divided in two groups: G1--11 fluent individuals; G2--11 stutterers. Electromyography recordings (inferior orbicularis oris) were collected in two different situations: during rest and in a reaction time activity.
RESULTS
The groups were significantly different considering rest muscle tension (G2 higher recordings) and did not differ when considering speech reaction time and muscle activity during speech. There was a strong positive correlation between speech reaction time and speech muscle activity for G2--the longer the speech reaction time, the higher the muscle activity during speech.
CONCLUSION
In addition to perceptible episodes of speech disfluency, stutterers exhibit anomalies in speech motor output during fluent speech. Correlations with a possible cortical-subcortical disorder are discussed.
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