| arousal | Cortical vigilance or readiness of tone, presumed to be in response to sensory stimulation via the reticular activating system. (12 Dec 1998) |
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| arousal function | The ability of a sensory event to arouse the cortex to vigilance or readiness. (05 Mar 2000) |
| arousal reaction | Change in pattern of the brain waves when the subject is suddenly awakened and becomes alert. (05 Mar 2000) |