Found that jarring, rapid-fire visual storytelling produced a physiological arousal led to better recall of what was seen, but only if the original subject matter was dull.
Men who smelled tears produced by women who cried from watching a sad film had lower testosterone levels and less physiological arousal than men who smelled a saline solution.
The laterodorsal tegmentum (LDT) neurons supply most of the cholinergic tone to the brainstem and diencephalon necessary for physiological arousal.
Thinking angry thoughts can provoke strong physiological arousal.