NDLI: Age-related changes in human vestibulo-ocular reflexes: sinusoidal rotation and caloric tests

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Age-related changes in human vestibulo-ocular reflexes: sinusoidal rotation and caloric tests

Content Provider	NASA Technical Reports Server (NTRS)
Author	Peterka, R. J. Black, F. O. Schoenhoff, M. B.
Copyright Year	1989
Description	The dynamic response properties of horizontal vestibulo-ocular reflex (VOR) were characterized in 216 human subjects ranging in age from 7 to 81 years. The object of this cross-sectional study was to determine the effects of aging on VOR dynamics, and to identify the distributions of parameters which describe VOR responses to caloric and to sinusoidal rotational stimuli in a putatively normal population. Caloric test parameters showed no consistent trend with age. Rotation test parameters showed declining response amplitude and slightly less compensatory response phase with increasing age. The magnitudes of these changes were not large relative to the variability within the population. The age-related trends in VOR were not consistent with the anatomic changes in the periphery reported by others which showed an increasing rate of peripheral hair cell and nerve fiber loss in subjects over 55 years. The poor correlation between physiological and anatomical data suggest that adaptive mechanisms in the central nervous system are important in maintaining the VOR.
File Size	871419
Page Count	15
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19890018840
Archival Resource Key	ark:/13960/t9v16xw1z
Language	English
Publisher Date	1989-01-01
Access Restriction	Open
Subject Keyword	Man/system Technology And Life Support Hair Dynamic Response Age Factor Human Tolerances Vestibular Tests Horizontal Orientation Human Beings Nerves Human Reactions Eye Movements Rotation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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