+Arousal refers to the physiological and psychological state of being awake and reactive to stimuli. It encompasses a spectrum of activation within the [brain](/wiki/brain) and [nervous system](/wiki/nervous_system), preparing an organism for perception or action. This core state influences alertness, attention, and emotional response.
+## See also
+- [Attention](/wiki/attention)
+- [Emotion](/wiki/emotion)
+- [Consciousness](/wiki/consciousness)
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