Fig. 4.

Characteristics of responses of neurons to tilts in vertical planes. Data are segregated based on whether the response gain for a particular unit increased more (advancing gain) or less (flat gain) than fivefold per stimulus decade. A and B: polar plots showing response vector orientations and gains of units. Response vector orientations were determined using wobble stimuli delivered at 0.5 Hz. The maximal radius of each plot designates a response gain of 15 spikes·s⁻¹·°⁻¹. C and D: Bode plots illustrating the dynamic properties of responses of neurons to rotations in a fixed plane near the response vector orientation at multiple frequencies. Response gain and phase were plotted with respect to stimulus position. Thin gray lines show data for individual neurons; thick solid lines indicate average values. Error bars designate 1 SE. CED, contralateral ear-down roll; IED, ipsilateral ear-down roll tilt.