FIG. 2.

Three periods of the stimulation patterns used in the present study for different numbers of electrodes. Each vertical line represents a biphasic stimulation pulse. The stimuli shown are for a channel rate of 100 pps/channel. The two columns illustrate burst and spread mode stimuli, respectively. Three modes of stimulation are shown: single-electrode stimuli in panels (A) and (F), burst mode stimuli that included two, five, nine, and 18 electrodes, respectively, in panels (B)–(E) and the same stimuli for spread mode in panels (G)–(J). Panels (A) and (F) are the same but were included in both columns to simplify comparison with the burst and spread mode stimuli in the two columns. The duration of each stimulus sweep is given next to the last stimulation pulse of the first sweep.