Figure 2. Grand-averaged event-related potentials (ERP) waveforms at five sites (Fz, Cz, Pz, C3, and C4) between the pre-heat baseline (1^st session, Rest), during heat stress (3^rd session, HS), and during heat stress with face/head cooling (3^rd session, FHC) in Go trials (Panel A, upper figures) and No-go trials (Panel B, lower figures).

Blue, red, and orange lines show waveforms in the 1^st, 2^nd, and 3^rd sessions, respectively. The amplitudes of the P300 component in both trials are clearly reduced during HS and remain reduced during FBC.