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. 2017 Nov 9;17:415–425. doi: 10.1016/j.nicl.2017.10.036

Fig. 2.

Fig. 2.

Evoked surface activity. (A) Mean common-reference cortical responses at a cephalic electrode (CZ; top row) and mean global field power (GFP; bottom row) in response to stimulation of the left ear (blue) and right ear (red) for children with normal hearing (n = 16), and bimodal hearing (n = 34; n = 17 each for left or right CI). The first positive (P1) and negative (N2) peaks are labelled for responses recorded at Cz. In general, responses were similar in amplitude across groups but slower in the bimodal groups. (B) Group average common-reference head topographic maps display the distribution of EEG activity across the surface of the head at GFP peak latencies for P1 and N2 peaks. CI = cochlear implant; HA = hearing aid.