Abstract

Objective: The purpose of this study was to 1) determine whether Vestibulo-ocular reflex (VOR) integrity is different between young adults with and without chronic motion sensitivity (CMS), 2) assess correlation between VOR integrity and postural stability in young adults with and without CMS; and 3) Compare postural stability across different levels of physical activity in young adults with and without CMS.

Design: A Cross-sectional study design.

Methods: Forty healthy young adult men and women (age, 20-40 years) were stratified into CMS and Non-CMS groups, VOR integrity was assessed using Bertec Vision Advantage (BVA), postural stability was assessed using computerized dynamic posturography with immersion virtual reality (CDP-IVR) conditions 1 and 2, Physical activity was assessed using the International Physical Activity Questionnaire short form (IPAQ-SF)

Results: There were no significant differences in median baseline visual acuity, visual processing time, dynamic visual acuity test, dynamic visual acuity lines lost, or gaze stability test between the CMS and non-CMS groups (p>0.05). Also, there was no significant correlation between VOR integrity and postural stability in participants with and without CMS (p>0.05). Lastly, There was no significant interaction between physical activity and equilibrium score for Conditions 1 and 2 (p=0.775 and 0.152)

Conclusion: Our findings showed no significant difference in VOR function in young adults with and without CMS and no significant correlation between VOR function and postural stability in young adults with and without CMS. However, we found that participants with CMS had impaired postural stability.

Keywords: Chronic motion sensitivity (CMS), Bertec vision advantage (BVA), Vestibulo-ocular reflex (VOR), Postural stability, Physical activity.

LLU Discipline

Physical Therapy

Department

Physical Therapy

School

School of Allied Health Professions

First Advisor

Eric Johnson

Second Advisor

Noha Daher

Third Advisor

Pablo Mleziva

Fourth Advisor

Summer San Lucas

Degree Name

Doctor of Philosophy (PhD)

Degree Level

Ph.D.

Year Degree Awarded

2025

Date (Title Page)

6-2025

Language

English

Library of Congress/MESH Subject Headings

Vestibulo-Ocular Reflex; Motion Sickness; Postural Balance; Physical Activity; Young Adult; Cross-Sectional Studies

Type

Dissertation

Page Count

xii, 52, [14] p.

Digital Format

PDF

Digital Publisher

Loma Linda University Libraries

Usage Rights

This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights.

Collection

Loma Linda University Electronic Theses and Dissertations

Collection Website

http://scholarsrepository.llu.edu/etd/

Repository

Loma Linda University. Del E. Webb Memorial Library. University Archives

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