Sound Production Treatment

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Sound Production Treatment for Acquired Apraxia of Speech
Acquired apraxia of speech (AOS) is a neurogenic motor speech disorder that results from an impaired capacity to plan or program the sensorimotor commands that direct the muscular movement and positioning necessary for phonetically and prosodically typical speech (Duffy, 2013). These clinical characteristics are not attributed to physiologic disturbances such as paralysis, paresis, or incoordination, or to the language processing disturbances that characterize aphasia. AOS is almost always the result of a disturbance in the left cerebral hemisphere of the brain. Common deviant speech characteristics of AOS include a slowed rate of speech, difficulties in sound production, abnormal prosody, and disturbed fluency. The characteristics that best distinguish AOS from other motor speech disorders are distorted sound substitutions and additions, decreased phonemic accuracy with increased rate and length of utterance, attempts to self-correct articulatory errors, groping for correct articulatory postures, and greater difficulty on volitional than
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This approach addresses the movement and positioning of the articulators to achieve accurate verbal productions (Wambaugh & Mauszycki, 2010). SPT employs a five-step treatment hierarchy that was based on a pre-existing eight-step continuum developed by Rosenbek, Lemme, Ahern, Harris, and Wertz (1973). This treatment hierarchy is response-contingent, meaning that individuals with AOS will only progress through the hierarchy if errors are persistent. The hierarchy outlined by Wambaugh, Kalinyak-Fliszar, West, and Doyle (1998) was originally conducted as
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