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Summary: JOCRLALOF NECROPHYSIOLOGY
Vol. 76, No. 5. November 1996. Prinred in U.S.A.
Adaptation of Primate Vestibuloocular Reflex to Altered Peripheral
Vestibular Inputs. I. Frequency-Specific Recovery of Horizontal VOR
After Inactivation of the Lateral Semicircular Canals
DORA E. ANGELAKI, BERNHARD J. M. HESS, YASUKO ARAI, AND JUN-ICHI SUZUKI
Department of Surgery (Otolaryngology), University of Mississippi Medical Center, Jackson, Mississippi 39216;
Department of Neurology, University Hospital Ziirich, CH-8091 Zurich, Switzerland; Department of Otolaryngology,
Tokyo Women's Medical College Daini Hospital; and Department of Otolaryngology, Teikyo University, Tokyo, JapanF
SUMMARY AND CONCLUSIONS INTRODUCTION
I. The adaptive plasticity of the vestibuloocular reflex (VOR)
following a selective lesion of the peripheral vestibular organs was
investigated in rhesus monkeys whose lateral semicircular canals
were inactivated by plugging of the canal lumen in both ears. Gain
and phase of horizontal, vertical, and torsional slow-phase eye
velocity were determined from three-dimensional eye movement
recordings obtained acutely after the plugging operation, as well
as in regular intervals up to 10 mo later.
2. Acutely after plugging, horizontal VOR was minimal during
yaw rotation with gains of
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