arousal https://en.wikipedia.org/wiki/Arousal https://www.wikidata.org/wiki/Q379784 Arousal is an emotion characterized by state of reactive to stimuli. It involves the activation of the reticular activating system in the brain stem, the autonomic nervous system and the endocrine system, leading to increased heart rate and blood pressure and a condition of sensory alertness, mobility and readiness to respond. arouse aroused arousing positive emotion