Fig. 7.

Electrically evoked ocular countertilt with stimulation of increasing pulse amplitude. Example data from Ch133 during a constant-rate pulse train using the same “near bipolar” pair of electrodes in the utricle, stimulating electrode 20 and reference electrode 15. A–F: the stimulation was on for 40 s (gray shaded area) with a pulse rate of 300 pps. Biphasic pulse was 100 µs per phase with a 50-µs interphase gap. G and H: as the current amplitude was increased for each trial, a larger ocular countertilt response was elicited (H) with consistent direction of eye response (G).