Influences Language Factors On The Speech Motor Control Of people Who Stutter

Introduction: Stuttering is the most common fluency disorder with defined genetic physiologic and psychological etiology .Stuttering is an inability to talk fluently under self-imposed or external demands such as time limited respond or complex sentences formulation. Fluent speaking requires some component such as motor abilities (speech muscle motor control), linguistic abilities (formulation and planning of speech), socio-emotional abilities (speech planning and execution under emotional or communicative stress). Multifactorial theories of stuttering posit that many variables_such as language, motor, cognitive, emotional, and genetic factors_interact in complex ways in both the development of stuttering and in the overt breakdowns in speech motor control that are perceived as stuttering-like disfluencies. Therefore, the purpose of this study is investigating of the potential effects of language factors on the speech motor control of people who stutter (CWS)Methods: This paper reviewed recent studies about speech motor control in stuttering. These papers were extracted from Science Direct, Proquest, Pubmed Data Bases.Results: Review Different studies showed that perceptible disfluencies are hypothesized to reflect underlying instabilities in the speech motor systems of individuals who stutter, which are present even during perceptually fluent speech. The relationship between overt breakdowns in speech motor control and the linguistic properties of spoken utterances indicates that the speech motor systems of many individuals who stutter are particularly vulnerable to heightened linguistic demands. We have found that the speech motor instability of individuals stutter, compared to that of their typically fluent peers, is disproportionately increased by heightened linguistic complexity, including the phonological complexity of novel non-words and the syntactic complexity of meaningful utterances.Conclusion: Different studies showed that individuals who stutter demonstrated increased articulatory coordination variability with increased linguistic complexity and the speech motor systems of people who stutter are sensitive to increased linguistic demands.

کلیدواژه ها:

Stuttering ، Motor Control ، Language