Fig. 7.
Comparison of monkey and chinchilla translational vestibulo-ocular reflex (tVOR) frequency response during lateral translation. Gain or sensitivity calculated in 3 different ways for right eye lateral translations. Top: angular eye position (°) divided by equivalent tilt angle [arctan(head acceleration/gravity)]. Middle: eye velocity (°/s) divided by head acceleration (g = 981 cm/s2). Bottom: eye velocity (°/s) divided by head velocity (cm/s). Data collected from Fig. 5 in Angelaki (1998) show the equivalent data recorded in monkeys, where the monkey horizontal (red circles) is equivalent to our chinchilla yaw (red lines) and monkey torsional (blue *) is equivalent to our chinchilla roll (blue lines). Note the similarity the roll/torsional components between species. However, the monkey horizontal response is much more robust than the chinchilla, a common difference seen between frontal and lateral-eyed animals. Error bars depict 1 SD from the mean values of either gain or phase.