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Effect of gravitoinertial force on ocular counterrolling.The effect of G loading on the magnitude of ocular counterrolling at various angles of tilt up to 63 deg. was measured on normal subjects and compared with the effect on persons with severe or complete loss of vestibular function. The group of six normal subjects manifested a compensatory eye roll which increased as a direct and essentially linear function of the component of the gravitoinertial force acting laterally on the subject. This increase in response was not observed in the five deaf subjects with severe or complete bilateral loss of their vestibular organs. These findings confirmed similar results found by other authors using other measuring techniques which show that the reflex eye movement is dependent on and limited to the magnitude of the gravitoinertial stimulus (within the range used) when the otolithocular system is functioning normally. However when this function is severely impaired or lost, the magnitude of the compensatory eye roll is limited to that manifested at 1 G and possibly to nonotolithic contributions. These findings offer means for differentiation between otolithic-defective and ?normal' persons who exhibit little counterrolling.
Document ID
19720028290
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Miller, E. F., II
Graybiel, A.
(U.S. Naval Aerospace Medical Center Aerospace Medical Research Laboratory, Pensacola, Fla., United States)
Date Acquired
August 6, 2013
Publication Date
November 1, 1971
Publication Information
Publication: Journal of Applied Physiology
Volume: 31
Subject Category
Biosciences
Accession Number
72A11956
Funding Number(s)
CONTRACT_GRANT: NASA ORDER L-43518
CONTRACT_GRANT: NASA ORDER T-81633
Distribution Limits
Public
Copyright
Other

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