The three-dimensional vestibulo-ocular reflex evoked by high-acceleration rotations in the squirrel monkey

摘要: The aim of this study was to determine if the angular vestibulo-ocular reflex (VOR) in response pitch, roll, left anterior–right posterior (LARP), and right anterior–left (RALP) head rotations exhibited same linear nonlinear characteristics as those found horizontal VOR. Three-dimensional eye movements were recorded with scleral search coil technique. VOR five planes (horizontal, vertical, torsional, LARP, RALP) studied three squirrel monkeys. latency evoked by steps acceleration darkness (3,000°/s2 reaching a velocity 150°/s) 5.8±1.7 ms all rotation. gain during 36.7±15.4% greater than that measured at plateau velocity. Polynomial fits trajectory show is proportional cube For sinusoidal 0.5–15 Hz peak 20°/s, did not change frequency (0.74±0.06, 0.74±0.07, 0.37±0.05, 0.69±0.06, 0.64±0.06, for yaw, RALP respectively). increased frequencies ≥4 Hz. rotational Hz, we VORs have In addition, gain, phase axis rotation LARP can be predicted once pitch roll responses are characterized.