Baseline ERO energy in the parietal delta band was not different between P and NP rats (Data not shown). Baseline ERO energy in the parietal theta band was lower in NP than in P rats in response to standard tones [P rats: 337.1 ± 48.2 vs. NP rats: 188.5 ± 32.7; F(1,20)=4.9, P<0.05]. Lower baseline ERO energy in the parietal alpha/beta band was also observed in NP rats in response to standard [P rats: 880.1 ± 62.4 vs. NP rats: 516.3 ± 42.2; F(1,20)=17.6, P<0.001], rare [P rats: 1095.0 ± 97.8 vs. NP rats: 625.2 ± 51.8; F(1,20)=12.6, P<0.005] and noise [P rats: 1209.1 ± 87.7 vs. NP rats: 715.4 ± 94.8; F(1,20)=13.5, P<0.005] tones.
