The cervico-ocular reflex in intact and chronically labyrinthectomized frogs.
Eye movements in response to horizontal oscillation of the body against the stationary head (cervico-ocular reflex) were measured with search coils in the frequency range between 0.02 and 1.0 Hz in intact and chronica bilaterally labyrinthectomized frogs. The evoked eye movements were compensatory in direction but only about 1-2% of the amplitude of the stimulus (+/- 5-20 degrees). In chronic bilaterally labyrinthectomized frogs (n = 5) very similar response characteristics were measured. The very small amplitudes of these responses in controls and in frogs with removed labyrinthine organs render this reflex functionally irrelevant for both gaze stabilization and recovery from dynamic vestibular deficits after a loss of labyrinthine function.
Rioult-Pedotti
M S
MS
Institut für Hirnforschung der Universität Zürich, Switzerland.
Dieringer
N
N
D000818:Animals; D007758:Ear, Inner / Q000502:physiology*; D005133:Eye Movements; D010812:Physical Stimulation; D011896:Rana temporaria / Q000502:physiology*; D012027:Reflex, Vestibulo-Ocular