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. 2008 Feb 21;9(2):241–251. doi: 10.1007/s10162-008-0112-4

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© The Author(s) 2008

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FIG. 2. — ECAP responses to anodic and cathodic phases. A Masker (thick line) and probe (thin line) used to measure the anodic phase response. B Masker and probe used to measure the cathodic-phase response. C and D ECAPs evoked by the first phases of anodic-first (C) and cathodic-first (D) phase-separated asymmetric probes. The time reference corresponds to the onset of the probe. The second phase is not displayed as it occurs 2.9 ms after the first one. The top panels show an example of a level series obtained with subject S5. The different curves correspond to probe levels ranging from a soft (320 μA) to a comfortably loud level (576 μA) by steps of 64 μA, with the size of the fluctuations increasing monotonically with increasing current level. The other panels show the responses to the highest probe levels for all the other subjects. The N1 peak of the anodic response occurs, on average, 290 μs after the onset of the probe.