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Dynamic Visual Acuity While Walking in Normals and Labyrinthine-Deficient PatientsWe describe a new, objective, easily administered test of dynamic visual acuity (DVA) while walking. Ten normal subjects and five patients with histories of severe bilateral vestibular dysfunctions participated in this study. Subjects viewed a visual display of numerals of different font sizes presented on a laptop computer while they stood still and while they walked on a motorized treadmill. Treadmill speed was adapted for 4 of 5 patients. Subjects were asked to identify the numerals as they appeared on the computer screen. Test results were reasonably repeatable in normals. The percent correct responses at each font size dropped slightly while walking in normals and dropped significantly more in patients. Patients performed significantly worse than normals while standing still and while walking. This task may be useful for evaluating post-flight astronauts and vestibularly impaired patients.
Document ID
19990080046
Acquisition Source
Johnson Space Center
Document Type
Reprint (Version printed in journal)
Authors
Hillman, Edward J.
(Baylor Coll. of Medicine Houston, TX United States)
Bloomberg, Jacob J.
(NASA Johnson Space Center Houston, TX United States)
McDonald, P. Vernon
(Wyle Life Sciences Houston, TX United States)
Cohen, Helen S.
(Baylor Coll. of Medicine Houston, TX United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1996
Publication Information
Publication: Journal of Vestibular Research
Publisher: IOS Press
Volume: 9
ISSN: 0957-4271
Subject Category
Behavioral Sciences
Funding Number(s)
CONTRACT_GRANT: NIH-NIDCD-5R29DCO2412-02
Distribution Limits
Public
Copyright
Other

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