Abstract
The frog posterior semicircular canal was stimulated sinusoidally by mechanical endolymphatic flow. The interaction of the excitatory and the inhibitory responses was analyzed on spike density histograms. When the oscillation started from the ampullofugal direction (AF), the evoked action potentials were readily suppressed by the following ampullopetal (AP) stimulus. When the oscillation started from the AP direction, the action potential appeared slowly, indicating that the inhibitory response is slower than the excitatory response.
