NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Physiological mechanisms of the nystagmus produced by rotations about an earth-horizontal axisThe physiological basis of the nystagmus produced by rotation about an earth-horizontal axis is investigated with particular emphasis on the unidirectional nystagmus attributed to a bias component. Eye movement recordings were made with dc electro-oculography in alert squirrel monkeys and afferent responses were recorded from semicircular canals and otolith receptors of anesthetized animals upon rotations in the pitch and yaw planes. The eye-movement recordings show the rotation responses in the squirrel monkey to resemble those of other species, including persistent horizontal and vertical nystagmuses during yaw and pitch rotations, respectively, a unidirectional nystagmus at low rotation speeds, and postrotatory responses of relatively small amplitude and duration. The vestibular nerve recordings do not show a directionally specific dc response that can account for the bias component, but instead exhibit sinusoidal responses of peak amplitudes 0-15 and 25-75 spikes/sec for the canals and otolith, respectively. Results thus indicate that the dc signal to the oculomotor centers responsible for the nystagmus is of central origin, most likely based on some transformation of the otolith signals.
Document ID
19820033896
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Goldberg, J. M.
Fernandez, C.
(Chicago, University Chicago, IL, United States)
Date Acquired
August 10, 2013
Publication Date
November 6, 1981
Subject Category
Life Sciences (General)
Accession Number
82A17431
Funding Number(s)
CONTRACT_GRANT: NIH-NS-01330
CONTRACT_GRANT: NGR-14-001-225
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available