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Title page for ETD etd-04252013-144457


Type of Document Master's Thesis
Author DeLong, Andrew Patrick
URN etd-04252013-144457
Title Specificity of the Video Head Impulse Test System
Degree Doctor of Audiology
Department Hearing and Speech Sciences
Advisory Committee
Advisor Name Title
Devin McCaslin Committee Chair
Gary Jacobson Committee Member
Jill Gruenwald Committee Member
Keywords
  • video
  • capstone
  • audiology
  • vestibular
  • balance
Date of Defense 2013-04-08
Availability unrestricted
Abstract
The vestibulo-ocular reflex (VOR) is responsible for maintaining clear vision on a target in the presence of head motion. A functional VOR driven by a healthy peripheral and central allows for three assumptions: eye velocity and head velocity are equal; eye rotation and head rotation occur in equal and opposite axes; and movements of the head and eye are synchronous. Caloric irrigations have served as the gold standard for assessing lateral semicircular canal function, and until recently video technology inadequately captured eye movement. With the advent of lighter, better-fitting goggles and improved video resolution, the video head impulse test (vHIT) is capable of recording saccades during and following high velocity, low amplitude head thrusts. The purpose of this project was to determine specificity of the EyeSeeCam video head impulse system on young normal participants. Normal vestibular function was confirmed with caloric irrigations, and asymmetry across all subjects was found to be 4%, suggesting sufficient specificity for clinical use pending sensitivity data in a clinical population.
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