Aphasia (CILT, And The Constraint-Induced Language Therapy

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According to the World Health Organization, 795,000 Americans suffer a stroke each year and of the survivors, twenty-five to forty percent will acquire aphasia. The National Aphasia Association defines aphasia as “an impairment of language, affecting the production or comprehension of speech and the ability to read or write.” Many of these people suffering from aphasia will undergo therapy at some point in time. Several approaches have been proven effective in lessening the symptoms of aphasia. A recent topic of interest over the last two decades has been the role that intensity plays in aphasia therapy. Several studies have been done to evaluate language outcomes for patients undergoing intensive versus non-intensive aphasia therapy, as well as to identify the specific intensive therapies that are effective. One such type of therapy is the Constraint-Induced Language Therapy (CILT). Another topic of interest in the aphasia community is regarding the “window of recovery” for those suffering from aphasia. It was commonly believed that language recovery from aphasia plateaus off within the first year following a stroke (Pedersen et al., 1995); however, new evidence suggests that when an intensive therapy such as CILT is implemented, results can be seen many years later. The present paper will investigate the role that intensity plays in aphasia therapy, take a closer look at CILT versus other approaches, and evaluate current research regarding the “window of recovery” in patients with aphasia.
The bulk of research examining intensity of treatment (sometimes known as dosage) has been completed within the last twenty years. Among these studies, there has been evidence both for and against implementing therapy in an intensive mann...

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...ook at the effect that these variables had on measures of language impairment in people with stroke-induced aphasia. This study also supported the idea that an increased intensity of therapy was associated with improvements of language impairment.
Many studies that explore effects of treatment intensity on aphasia recovery do so by looking at a specific type of intensive therapy known as Constraint-Induced Language Therapy (CILT). Pulvermuller et al. (2001) was the first to examine how constraints placed on a person with aphasia so as to limit them to only a verbal means of communication might improve verbal output. The idea stemmed from evidence in the physical therapy field that large motor improvements are possible when the lesser affected limb is constrained and intensive therapy is provided to the more severely affected limb (Taub, Uswatte, Pidikiti, 1999).

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