Fig. 4
Comparison of motion and GVS for canal afferents. a Firing rate (gray) of example regular (blue) and irregular (red) canal afferents to 1 Hz (left) and 8 Hz (right) head rotational velocity. Firing rate estimates (solid blue and red line) were found using Eq. 4. The irregular canal afferent was more sensitive to rotation than the regular canal afferent (1 Hz: 1.05 versus 0.60 spk s−1 per deg s−1; 8 Hz: 2.20 versus 1.05 spk s−1 per deg s−1). b Population-averaged neuronal gain (i.e., sensitivity) (left) and phase (right) for regular (blue) and irregular (red) canal afferents as a function of the rotation (dashed lines) and GVS (solid lines) stimulus frequency. Gain in the main plot was normalized to responses at 0.5 Hz for comparison of responses across stimulus type, while the inset shows the non-normalized gain plotted with stimulus specific units. Error bars depict the s.e.m.
