Illustration of the mean self-initiation effect. (A) Grand-average ERPs (mean of all attention conditions AS, AM, AV) at Cz elicited by externally-initiated sounds (black solid line), self-initiated sounds (black dotted line), as well as the difference wave (externally-initiated minus self-initiated, red line). (B) Voltage maps and scalp current densities (SCDs) of the difference wave during the latency ranges of the N1a (60–100 ms), N1b (85–150 ms) and N1c (115–150 ms) time window.
Timm et al. BMC Neuroscience 2013 14:2 doi:10.1186/1471-2202-14-2