MeanZ-scored power of Fourier transform spectra of OFC during open-field habituation (Hab; black, n = 21;STAR Methods), early in learning (Det first, purple, n = 20) and at the end of the learning (Det end, green, n = 19). Data are presented as mean ± SEM across subjects. Power in the θ-band frequency (7–14 Hz, gray box) shows a significant difference between the three conditions (ANOVA, F(2,65)= 3.94, p = 0.024), with differences between the Hab session and the first (Student’s t test, T(43)= 2.80, p = 0.015, Δ = +0.003) and last (paired Student’s t test, T(22)= -2.98, p = 0.02, Δ = +0.002) sessions of the D context. There were no difference between first and last sessions (Student’s t test, T(43)= 1.22, p = 0.23). ∗∗∗p < 0.001,∗∗p < 0.01,∗p < 0.05, n.s. p > 0.05.
