Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Date of Graduation

Spring 5-3-2013

Document Type


Degree Name

Doctor of Philosophy (PhD)


Department of Communication Sciences and Disorders


Lincoln C. Gray

Jonathan Spindel


Dizziness can often be a serious and confounding condition that ranges in severity from annoying to debilitating and affects many people. The most common and effective treatment for persistent dizziness is vestibular rehabilitation therapy, which falls into three categories: adaptation, sensory substitution, and habituation. While more is known about adaptation and sensory substitution, questions remain regarding the exact mechanisms of recovery for habituation. Precisely, the optimal stimulation to the vestibular system, as measured in intensity of head accelerations, is unknown for habituation treatment. In this dissertation are drafts of two manuscripts. The first explores the average intensity of linear and angular head accelerations in non-symptomatic and symptomatic subjects across age and self-reports of dizziness and imbalance during four commonly-used habituation exercises. The second paper presents a mathematical formula for transposing angular displacement in the traditional anatomical planes to the planes of the semicircular canal pairs for collected data on angular displacement of the head. This mathematical model allows for conversion of measurement from overall head accelerations into angular acceleration in the planes of each paired set of semicircular canals, and increases research and clinical knowledge of vestibular stimulation during head-movement exercises.



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.