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Biomedical subjects
Publications and source records attributed to M I Rolnick.
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Dysarthria occurs in approximately 40% of all patients with MS. When speech and voice disturbances do occur, they usually present as a spastic-ataxic dysarthria with disorders of voice intensity, voice quality, articulation, and intonation. While language disturbances such as aphasia, auditory agnosia, anomia, dysgraphia, and dyslexia are very rare in MS, cognitive deficits and swallowing disorders are common. Treating dysarthria, dysphagia, and cognitive deficits in MS patients is effective for reestablishing functional daily activities. The types, severity, and rates of deterioration in MS are highly variable; complete restoration to normal functioning is therefore not always expected. For these reasons, careful documentation of clinical-treatment outcomes and the factors influencing these outcomes should be regularly collected and reported.
The utilization of voice spectrography can be an important adjunct to the assessment of vocal cord function by both laryngologists and speech pathologists. It is especially useful in determining the effectiveness of vocal cord Teflon paste injection procedures. Dysphonic characteristics are made visible, and their improvement can be monitored. As such, spectrographic analysis should be considered as a useful tool for the laryngologist.
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Vocal cord dysfunction has a definite incidence of association with high environmental noise levels. Our study has shown roughly an 8% incidence of vocal cord dysfunction (vocal cord nodules, vocal cord polyps and chronic laryngitis) in individuals working in high noise environments. In addition, those individuals who have surgery for vocal cord nodules and who work in high noise environments will have over a 30% incidence of recurrent vocal cord dysfunction following surgery. Our study indicates that females tend to be more at risk in high noise environments than males.
Objective and quantitative evaluation of vocal cord function is a goal that has been difficult for voice clinicians to obtain. To be useful as a clinical screening tool it must be easy to perform, it must produce numerical storable data, it must have a high degree of accuracy, and it must be cost-effective. The results of this study have shown that using the perturbation factor and the equipment described, a successful rate of greater than 93% can be obtained in evaluating vocal cord dysfunction. The results further indicate that this equipment can be used much in the same way as an audiogram to follow-up and clinically evaluate on an objective basis the function of the vocal cords.