Graduate Thesis Or Dissertation


Vestibular Perceptual Thresholds for Angular Rotation about the Yaw, Roll, and Pitch Axes Public Deposited

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  • Vestibular perceptual thresholds quantify the magnitude of self-motion in which a human can perceive differences between motion directions. They are a measure of vestibular sensory and perceptual noise in individuals. Rotational thresholds correspond to angular motion about an Earth-vertical axis for each of the three orthogonal directions in a human-centered reference frame: yaw, roll, and pitch. In early works, within-subject experiments have sought to quantify how thresholds differ between yaw, roll, and pitch rotation at a sinusoidal acceleration profile frequency of 0.3Hz (Benson et al., 1989). Our current effort uses modern methods and definitions to reassess if rotational thresholds differ both between these three axes of rotation at 0.3Hz and additionally across a range of frequencies: 0.1Hz, 0.3Hz, and 0.5Hz. In contrast to the established findings of Benson et al., no statistically significant differences were found between the three rotational axes at 0.3Hz. No statistically significant differences are found at any of the chosen frequencies. Moreover, while yaw and roll thresholds have previously been well quantified for a range of frequencies, this study fills a gap in the literature and is the first effort to quantify pitch rotation thresholds across a range of frequencies. Finally, threshold data is examined for inter-individual trends between these three frequencies and across all three axes of rotation. Using Pearson’s correlation coefficients, it was found that some thresholds may be indicative of other threshold measures for an individual.

Date Issued
  • 2021-11-30
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  • 2022-06-15
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