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Article type: Research Article
Authors: Peterka, R.J.; *; ** | Black, F.O. | Schoenhoff, M.B.
Affiliations: Good Samaritan Hospital and Medical Center, R.S. Dow Neurological Sciences Institute, and Department of Neuro-otology, Portland, OR
Note: [*] Reprint address: Robert J. Peterka, Dept of Neuro-otology, NO10, Good Samaritan Hospital & Medical Center, 1040 N.W. 22nd Avenue, Portland, OR 97210.
Note: [**] Dr. Peterka is presently the Scientific Systems Manager at Department of Neuro-otology and Assistant Scientist at R.S. Dow Neurological Sciences Institute.
Abstract: The dynamic response properties of horizontal vestibulo-ocular reflex (VOR) were characterized in 216 human subjects ranging in age from 7 to 81 y. The effects of aging on VOR dynamics and parameter distributions that describe VOR responses to caloric and to sinusoidal rotational stimuli were determined 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 that showed an increasing rate of peripheral hair cell and nerve fiber loss in subjects over 55 y. The poor correlation between physiological and anatomical data suggest that adaptive mechanisms in the central nervous system are important in maintaining the VOR.
Keywords: vestibular, eye movements, rotation testing
DOI: 10.3233/VES-1990-1106
Journal: Journal of Vestibular Research, vol. 1, no. 1, pp. 49-59, 1990
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