Velopharyngeal closure is achieved by the speaker's facility to manage muscle subgroups as coordinative structures because of the differential demands of speech production.
For instance, flexibility and plasticity are hypothesized as speech motor control strategies that are used by speakers to achieve velopharyngeal closure (Moon & Jones, 1991).
Plasticity is a hypothetical construct that would allow speakers to change or alter their current rule system in the presence of a problem such as a velopharyngeal closure deficit.
It is likely that all are important in velopharyngeal closure, and an appropriate treatment furnishes opportunities for the speaker to unconsciously engage in tasks that may facilitate flexibility or plasticity (Clark, 2003; Weismer, 1997).
Aims and Findings of Muscle Treatment Programs in the Treatment of Velopharyngeal Closure for Speech
There are different types of muscle treatment programs that have been and are currently employed by speech-language pathologists in the behavioral treatment of velopharyngeal closure. Some are used in conjunction with speech tasks, while others are utilized in the context of nonspeech oral motor activities (Ruscello, 2004).
A strength building exercise for velopharyngeal closure can be carried out with the use of continuous positive airway pressure (CPAP) (Kuehn1991, 1997; Kuehn et al.
In the case of velopharyngeal closure, a target might be increasing range of movement through either stretching or range of motion exercises.