Speech and Down Syndrome

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One in every 732 newborns is born with a genetic disorder called Down syndrome (DS). It is the most common cause of intellectual impairments due to the presence of an extra chromosome in the 21st pair (Cleland, et al. 2010). The severity rates vary in every individual affected, however, 85% of people with DS present with mild to moderate intellectual disorder, and a minority of individuals with DS present with severe impairment (Barnes, et al. 2009). Research shows that children with DS appear to have more deficits in expressive speech and language compared to typical developing children. Speech intelligibility, the ability of a speaker to produce an understandable message to a listener, is particularly impaired (Kumin, 1994). At the age of four, most typically developing children are fully intelligible. Conversely, the speech of children with DS tends to be unintelligible throughout their lives (Stoel-Gammon, 2001). Long-standing difficulties with intelligibility can most likely be attributed to phonological patterns associated with DS. Therefore, intervention for children with DS is vital to the ultimate goal of them being able to grow up, live independently, and work in the community (Stoel-Gammon, 2001).
Profiles associated with children who have Down syndrome
Although there is not one specific profile associated with children with Down syndrome, there are particular traits seen in the majority of this population. There are several physical characteristics that are seen in the profile of a child with Down syndrome. Congenital heart disease, anomalies of the facial features, and hypotonia are just a few of the traits commonly associated with Down syndrome (Roberts, Price & Malkin, 2007). Children with Down syndrome fr...

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...displays the timing and location of the contact between an individual’s tongue and hard palate during speech (Wood, et al. 2009). The EPG also uses visual feedback to compare typical articulation patterns to the actual produced articulation patterns (Wood, et al. 2009). It has been shown to improve children with Down syndrome’s speech production difficulties as well as their intelligibility.
A case study of a ten year old girl with DS was given EPG therapy in order to resolve a phonological process of velar fronting. The study showed changes in the accuracy of the contact between the tongue and artificial palate over 14 weeks. Training with the visual feedback allowed the child to alter her tongue placement and generalize it to conversational speech (Wood, et al. 2009). As a result, she had fewer articulation errors and her intelligibility significant improved.

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