This phenomenon – CRN presence in SL waveforms but virtual absence in their ERP counterparts – is shown in Figure 13 for 129-channel EEGs recorded from 17 healthy adults during an oddball paradigm with complex tones or consonant-vowel as stimuli (Kayser and Tenke, 2006b). In different task blocks, participants were instructed to respond to targets (20% probability) with a left or right button press (for further details, see Kayser and Tenke, 2006a). Data were pooled across tonal and phonetic stimuli and included about 50 trials for each response hand (M ±SD: for left press, 49.6 ± 7.0, range 39–61; for right press, 47.8 ± 9.7, range 24–63). The response-locked CSDs reveal a distinct mid-frontocentral negativity (sink) that is restricted to the right hemisphere (cf. electrode location 107, which is approximately site FCC2h in the 10–5 system; Jurcack al., 2007) for left hand responses, and to the left hemisphere (cf. location 13, approximately FC1) for right hand responses (Fig. 13A, column 2 and 3; Fig. 13B, column 4). These unilateral midfrontal sinks are accompanied by bilateral centroparietal sources, which are also
