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Primate Translational Vestibuloocular Reflexes. II. Version and Vergence Responses to Fore-Aft Motion
 

Summary: Primate Translational Vestibuloocular Reflexes. II. Version and
Vergence Responses to Fore-Aft Motion
M. QUINN MCHENRY AND DORA E. ANGELAKI
Department of Otolaryngology and Anatomy, University of Mississippi Medical Center, Jackson, Mississippi 39216-4505
McHenry, M. Quinn and Dora E. Angelaki. Primate translational
vestibuloocular reflexes. II. Version and vergence responses to fore-
aft motion. J. Neurophysiol. 83: 16481661, 2000. To maintain bin-
ocular fixation on near targets during fore-aft translational distur-
bances, largely disjunctive eye movements are elicited the amplitude
and direction of which should be tuned to the horizontal and vertical
eccentricities of the target. The eye movements generated during this
task have been investigated here as trained rhesus monkeys fixated
isovergence targets at different horizontal and vertical eccentricities
during 10 Hz fore-aft oscillations. The elicited eye movements com-
plied with the geometric requirements for binocular fixation, although
not ideally. First, the corresponding vergence angle for which the
movement of each eye would be compensatory was consistently less
than that dictated by the actual fixation parameters. Second, the eye
position with zero sensitivity to translation was not straight ahead, as
geometrically required, but rather exhibited a systematic dependence

  

Source: Angelaki, Dora - Department of Anatomy and Neurobiology, Washington University in St. Louis

 

Collections: Biology and Medicine