Figure 4 | Scientific Reports

Figure 4

From: States and traits of neural irregularity in the age-varying human brain

Figure 4

Pre-stimulus entropy and theta (4–6 Hz) phase angle at sensory encoding both predict perceptual decisions. (A) The probability of choosing S1 is shown for each subject and entropy bin (diamonds). Grey lines depict single-subject slopes fitted to probabilities across bins for visualization. Slopes were significantly positive on average (black dashed line, p = 0.005) representing an increase of choices for S1 with increasing pre-stimulus entropy (represented by bars of darkening lilac ± 1 SEM). (B) Again probabilities of choosing S1 are shown per participant and bin together with grey lines representing slopes. Here, with increasing bin number, theta phase similarity at S1 onset increased, hence, ITC increased (bars of darkening green ± 1 SEM). With increasing phase similarity, decisions for S1 got more likely (black dashed line, p = 0.005). Circle plots show distributions of phase angles per bins for an exemplary participant along with the mean angle across trials. (C) Links of irregularity, encoding and decisions. The found relations of pre-stimulus irregularity with encoding and perceptual decisions as well as the link of encoding and perceptual decisions are visualized. Arrows imply temporally ordered, not strictly causal connections. Note that r denotes the observed effect size. Colors correspond to measures as visualized in (A and B).