Grants and Contracts Details
Description
Advances in digital technology have made high speed digital imaging (HSDI) a clinical
reality for assessment of voice disorders. HSDI is the only tool currently that has the
potential to provide detailed biomechanical assessment of the vocal fold vibration
because of their frequency independence and capture rates up to 8,000 frames per
second, unlike other clinical tools, make it is possible to assess actual cycle-to-cycle
variations of vocal fold motions that are brief, transitory, and extremely aperiodic.
The goal of this research is to study the use new imaging tool called the high speed
digital imaging to identify key components of vocal fold motion disturbance responsible
for vocal spasms and strained, strangled voice quality in patients with adductor
spasmodic dysphonia. The battery of tests that are currently used to clinically test vocal
fold vibrations, result in invalid assessments in participants with severe dysphonia, like
that of spasmodic dysphonia, due to inherent limitations of the instruments. High speed
digital imaging however can capture upto 8000 frames per second; hence can be used
to evaluate the small and rapid changes of vocal fold vibrations. Simultaneous laryngeal
electromyographic recordings will be performed high speed digital imaging to
investigate the muscle activity responsible for the unique vibratory features observed in
participants with spasmodic dysphonia.
Results from this study will assist in clinical decision making regarding treatment with
unilateral vs. bilateral botulinum toxin injections. The findings of this study will also help
investigate the much needed short-term and long-term outcomes of voice quality and
vocal fold motion, following botulinum toxin in patients with spasmodic dysphonia.
Status | Finished |
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Effective start/end date | 12/1/10 → 7/20/12 |
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