1. Effortful pitch glide: a potential new exercise evaluated by dynamic MRI
- Author
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Miloro, Keri Vasquez, Pearson, Jr., William G., and Langmore, Susan E.
- Subjects
Deglutition disorders -- Diagnosis ,Throat -- Medical examination ,Magnetic resonance imaging -- Methods ,Health - Abstract
Purpose: The purpose of this study was to compare the biomechanics of the effortful pitch glide (EPG) with swallowing using dynamic mRi. The EPG is a combination of a pitch glide and a pharyngeal squeeze maneuver for targeting laryngeal and pharyngeal muscles. The authors hypothesized that the EPG would elicit significantly greater structural excursions of anterior hyoid, superior hyoid, hyolaryngeal approximation, laryngeal elevation, and lateral pharyngeal wall medialization compared with swallowing. Method: Eleven healthy, young subjects with a mean age of 25 were recruited. The EPG was first taught and verified via laryngoscopy. Then 2-planar (coronal and sagittal) dynamic MRI acquisitions captured 10 repeated swallows and 3 EPGs. Kinematic analyses of minimum and maximum excursion of anatomical landmarks were calculated. Results: Results showed a nonsignificant difference between the 2 tasks for range of excursion with all measured biomechanics except for superior hyoid, where the swallow showed significantly greater excursion. This indicated that swallowing and EPG biomechanics were comparable, lending support for the potential use of the EPG as another nonswallowing exercise. Conclusion: Findings suggest EPG may be an effective exercise to target several important swallowing muscles, especially the long pharyngeal muscles that elevate the larynx and shorten the pharynx in swallowing. Key Words: swallow, exercise, dynamic MRI, pitch glide, pharyngeal squeeze maneuver, Rehabilitation of the swallow using exercises is frequently implemented to improve deglutitive function. However, the underlying mechanics of many of these exercises have not been fully explored. Two examples of [...]
- Published
- 2014
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