Diagnostic Procedures and Instruments Used in the Assessment and Treatment of Speech

  • Samuel Berkowitz

30.10 Summary

Several instrumental procedures are available for assessing the velopharyngeal mechanism and its function. Each has advantages and disadvantages, and choosing among them depends on the specific purpose of the evaluation. The reliability of endoscopic procedures is not well documented.

Aerodynamic measures provide data about the area of the velopharyngeal opening, velopharyngeal resistance to air flow, and air pressure available for the production of obstruent sounds. These measures provide no information about the relative contributions of the velum and the pharyngeal walls to velopharyngeal function.

An important warning in the use of any instrumentation for the study of speech is that data taken during speech production must be interpreted within the context of the patient’s repertoire of speech proficiency.


Soft Palate Cleft Palate Vocal Tract Lateral Pharyngeal Wall Velopharyngeal Closure 
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© Springer-Verlag Berlin Heidelberg 2006

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  • Samuel Berkowitz

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