Dynamic brain connectivity predicts emotional arousal during naturalistic movie-watching
Fig 4
Functional anatomy of arousal.
A. Arousal networks for Sherlock, Friday Night Lights, and their overlap. Each cell represents the proportion of selected FCs among all possible FCs between each pair of functional networks. The cells in the upper triangle represent the high-arousal network (red), and the cells in the lower triangle represent the low-arousal network (blue). Network pairs with above-chance selected FCs are indicated with an asterisk (one-tailed t-test, FDR-corrected p < .05). B. Visualization of the overlap arousal network. Each node represents a brain region. The lines connecting two nodes show their functional connection (red: high-arousal network; blue: low-arousal network). C. Connectome-based model trained on the overlap arousal network generalized to two more fMRI datasets, Merlin and North by Northwest. The left figure indicates how well the model could predict the group averaged experiences of arousal. We averaged the model predictions across participants watching the same movie and computed the correlation between the group-average model predictions (predicted arousal) and group-average arousal ratings from a separate group of individuals (observed arousal). The gray bands indicate the standard deviation of predicted arousal across participants at each time point. The right figure shows the predictive accuracy of the across-dataset prediction. The model was trained on a minimal set of FCs that predicted arousal in both Sherlock and Friday Night Lights, and tested separately on Merlin and North by Northwest. **p < .01, as assessed by comparing the empirical mean predictive accuracy against the null distribution.