Figure 2.

2 s constant pulse frequency and constant current amplitude (constant parameter) biphasic pulse train stimulation at the distal electrode of a canal array elicits nystagmus. (A) Representative response to 2 s stimulation in the right lateral canal (MC6) of monkey M4. Traces from top to bottom are horizontal eye velocity, horizontal eye position, and stimulus train. The horizontal and vertical eye position are at primary position (straight ahead) at the onset of stimulation. The stimulation parameters are biphasic pulses 125 μA, 300 pps, 100 μs per phase, 8 μs gap. (B) Average slow phase velocity of nystagmus elicited by 2 s constant parameter stimulation trains at different pulse frequencies and current amplitudes for 4 right lateral canals (MC1, MC4, MC5, and MC6). Each point represents average data from multiple trials and slow phases. Each line represents data at a different current amplitude. Negative velocity values are leftward. Canal orientation for each canal is indicated as LC (lateral canal).