Effect of light sleep on three-dimensional eye position in static roll and pitch.
We examined three-dimensional eye positions in alertness and light sleep when monkeys were placed in different roll and pitch body orientations. In alertness, eye positions were confined to a fronto-parallel (Listing's) plane, torsional variability was small and static roll or pitch induced a torsional shift or vertical rotation of these planes. In light sleep, the planes rotated temporally by about 10 degrees, torsional variability increased by a factor of two and the static otolith-ocular reflexes were reduced by about 70%. These data support the importance of a neural control of the thickness and orientation of Listing's plane, and suggest that part of the vestibular input underlying otolith-ocular reflexes depend on polysynaptic neural processing.
Cabungcal
J H
JH
Department of Neurology, University Hospital of Zurich, Frauenklinikstrasse 26, 8091 Zurich, Switzerland. cabungcal@nos.usz.ch
Misslisch
H
H
Scherberger
H
H
Hepp
K
K
Hess
B J
BJ
D000818:Animals; D005133:Eye Movements / Q000502:physiology*; D016014:Linear Models; D008253:Macaca mulatta; D009949:Orientation / Q000502:physiology*; D012018:Reflex / Q000502:physiology; D012890:Sleep / Q000502:physiology*