Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network

  Advanced Search  

Three-Dimensional Organization of Otolith-Ocular Reflexes in Rhesus Monkeys. III. Responses to Translation

Summary: Three-Dimensional Organization of Otolith-Ocular Reflexes in Rhesus
Monkeys. III. Responses to Translation
Department of Surgery (Otolaryngology), University of Mississippi Medical Center, Jackson, Mississippi 39216-4505
Angelaki, Dora E. Three-dimensional organization of otolith-ocu- ior. Despite a wealth of information about semicircular ca-
lar reflexes in rhesus monkeys. III. Responses to translation. J. nal-ocular reflexes that are activated during head rotation
Neurophysiol. 80: 680695, 1998. The three-dimensional (3-D) (rotational VORs), surprisingly little is known about the
properties of the translational vestibulo-ocular reflexes (transla- otolith-ocular reflexes. Nevertheless, translational compo-
tional VORs) during lateral and fore-aft oscillations in complete
nents are often encountered in everyday life. Similar to headdarkness were studied in rhesus monkeys at frequencies between
rotation, translational movements require the generation of0.16 and 25 Hz. In addition, constant velocity off-vertical axis
temporally and spatially specific eye movements for accuraterotations extended the frequency range to 0.02 Hz. During lateral
gaze stabilization (we will refer to the eye movements gener-motion, horizontal responses were in phase with linear velocity in
ated during translation as translational VORs). The task ofthe frequency range of 210 Hz. At both lower and higher frequen-
cies, phase lags were introduced. Torsional response phase changed the translational VORs is kinematically more complex. The
more than 180 in the tested frequency range such that torsional compensatory response depends not only on the perturbing
eye movements, which could be regarded as compensatory to ``an head translation, but also on the spatial location of the
apparent roll tilt'' at the lowest frequencies, became anticompensa- viewed image with respect to each eye (Paige 1989; Paige
tory at all frequencies above 1 Hz. These results suggest two and Tomko 1991a,b; Schwarz and Miles 1991; Schwarz et
functionally different frequency bandwidths for the translational


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


Collections: Biology and Medicine