Figure 1From: Brain function monitoring during off-pump cardiac surgery: a case reportSEP (N20/P25) amplitude variation during the intraoperative steps. The right SEP disappeared when the heart is enucleated. Both SEPs have a non significant wave amplitude attenuation at the end of surgery. N20/P25 complex is the most important scalp-recorded cortical component that has a negative peak about 20 msec followed by a positive peak at about 25 msec.Back to article page