Description of ELAR latency

Waves N1 and P2 were present for all the subjects and all tested electrodes. They were similar to the ELAR previously described in the literature (e.g., Maurer et al., 2002; Firszt et al., 2002a,b). The average latency across electrodes was 86 msec for N1 and 179 msec for P2, which is slightly earlier than the acoustic counterpart for each component as previously described by Ponton & Don (1995) using the Nucleus 22 cochlear implant, Maurer et al. (2002) using the MXM Digisonic system implant, and Firszt et al. (2002a,b) using the Clarion 1.2 device. The mean value across electrodes was 92 msec for N1-P2 interval, which is similar to the value found in normal hearing subjects. These results suggest that if there is a better neural synchronisation with electrical stimulation that results in shorter synaptic delays along the auditory pathway, this faster phenomenon occurs at lower levels than the neural generators of P2.