Figure 2

MPF values per electrode localisation. The figures represent the 8 electrode localizations, from the frontal areas at the top (Fp1, Fp2) to the parietal areas at the bottom (P3, P4). Amplitudes of MPF are indicated by colors, ranging from deep blue (7 Hz) to red (12 Hz). MPF amplitudes are presented as mean values of the first and last 5 minutes of the exposure hour and post exposure hour. The highest values for MPF during diesel exposure are observed at the frontal polar electrode sites (Fp1, Fp2). At these sites MPF increases significantly during diesel exposure compared to sham exposure. Following the diesel exposure MPF continued to increase resulting in significant differences at the frontal polar and the frontal sites (Fp1, Fp2, F3, F4) compared to the post-sham exposure period.