NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Eye-head coordination during optokinetic stimulation in squirrel monkeysHead and eye movements in the yaw plane were recorded during and after optokinetic stimulation in squirrel monkeys. 1) Phasic or tonic head deviations to the side of the ocular quick phase occurred in 94% of total recordings (n = 50) during the perstimulus period, and in 75% of recordings (n = 49) during the poststimulus period. Magnitude of mean head deviation was significantly different between perstimulus and poststimulus periods. 2) Head nystagmus associated with eye nystagmus was consistently observed in seven of nine squirrel monkeys during optokinetic stimulation. Squirrel monkeys are thereby less prone to display head nystagmus than either guinea pigs, pigeons or chickens. 3) Slow phase speeds of coupled head and eye nystagmus were subjected to statistical analysis. A highly significant negative correlation was found between slow phase head and eye speeds. The correlation coefficient was - 0.81 at 60 degrees / sec stimulus (n = 119) and -0.72 at 100 degrees / sec stimulus (n = 131). The gaze speed, calculated by summing the head and eye speeds, was 59.1 plus or minus 6.8 / sec at 60 degrees / sec and 92.2 plus or minus 11.4 at 100 degrees / sec stimulus. There was no significant difference between the gaze speed in a free head condition and the eye speed when the head was fixed.
Document ID
20050075909
Acquisition Source
Johnson Space Center
Document Type
Reprint (Version printed in journal)
Authors
Kubo, T.
Igarashi, M.
Jensen, D. W.
Homick, J. L.
Date Acquired
August 22, 2013
Publication Date
January 1, 1981
Publication Information
Publication: The Annals of otology, rhinology, and laryngology
Volume: 90
Issue: 1 Pt 1
ISSN: 0003-4894
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: NAS9-14546
CONTRACT_GRANT: NS-7237
CONTRACT_GRANT: NS-10940
Distribution Limits
Public
Copyright
Other

Available Downloads

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