Neural Correlates of Speech Processing in Prelingually Deafened Children and Adolescents with Cochlear Implants
Figure 2
Standards (red), deviants (blue) and their difference waveform (black) are shown at central (FCz) and frontal (F3 and F4) positions for all three groups to facilitate comparison of the later described effects in source space. Average reference was used. The MMN appeared in sensor space for the control group from 220 to 310 ms (120–210 ms lc) and for CI users from 230 to 350 ms (130 to 250 ms lc). As in source space, the MMN seems to be stronger in the good performers than in the bad performers. The double peak of the MMN found in the bad performers in source space can also be seen here (F3, F4). The CI artifact is visible in all CI users at 114 ms (14 ms lc).