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Vestibular-ocular accommodation reflex in manStimulation of the vestibular system by angular acceleration produces widespread sensory and motor effects. The present paper studies a motor effect which has not been reported in the literature, i.e., the influence of rotary acceleration of the body on ocular accommodation. The accommodation of 10 young men was recorded before and after a high-level deceleration to zero velocity following 30 sec of rotating. Accommodation was recorded continuously on an infrared optometer for 110 sec under two conditions: while the subjects observed a target set at the far point, and while they viewed the same target through a 0.3-mm pinhole. Stimulation by high-level rotary deceleration produced positive accommodation or a pseudomyopia under both conditions, but the positive accommodation was substantially greater and lasted much longer during fixation through the pinhole. It is hypothesized that this increase in accommodation is a result of a vestibular-ocular accommodation reflex.
Document ID
19760030611
Document Type
Reprint (Version printed in journal)
Authors
Clark, B. (NASA Ames Research Center Moffett Field, CA, United States)
Randle, R. J. (NASA Ames Research Center Moffett Field, CA, United States)
Stewart, J. D. (San Jose State University, San Jose; NASA, Ames Research Center Moffett Field, Calif., United States)
Date Acquired
August 8, 2013
Publication Date
November 1, 1975
Subject Category
AEROSPACE MEDICINE
Funding Number(s)
CONTRACT_GRANT: NGL-05-046-002
Distribution Limits
Public
Copyright
Other