Figure 2.

Semicircular canal afferents can be categorized as calyx or noncalyx units by their discharge properties. Shown is the relation between the gain in response to 2-Hz, 20-deg/s sinusoidal rotations and discharge regularity, the latter measured by a normalized coefficient of variation (cv^*). Labeled calyx (+) and noncalyx (x) afferents from Baird et al. (1998) were used to construct the curved line, a quadratic discriminant function, which was then used to classify the unlabeled units of the present study as calyx (○) or noncalyx (●). Gains of noncalyx units related to cv^* by a power law (straight line).