Figure 3

Event-related potentials in the Lines and the Clock task. (A) Grand mean ERP elicited by Irrelevant stimuli, presented on the Cz electrode. (B) Scalp distribution of P3a component, measured at peak latency (384.8 ms in both tasks). (C) Grand mean ERP elicited by Probe stimuli, presented on the CPz electrode. (D) Scalp distribution of P3b component, measured at peak latency (468.7 ms for the Lines, and 568.4 for the Clock task). (E) Amplitude of P3a and P3b elicited by Irrelevant and Probe stimuli, respectively, averaged over electrodes. P3a and P3b amplitudes showed similar spaceflight related alterations, as both components decreased significantly during in-flight compared to pre-flight. No differences were present between the two in-flight sessions. Compared to pre-flight, amplitudes remained decreased throughout the post-flight period. Error bars represent within-subjects SEM²². **p < 0.01; *p < 0.05.