Arousal
Arousal
Arousal (/əˈraʊzəl/) is a physiological and psychological state of being awake or 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.
Etymology
The term "arousal" comes from the Old French word "arouser" which means "to stir up".
Related Terms
- Wakefulness: The state of being conscious.
- Stimulus (physiology): A change in the environment that is responded to by an organism.
- Reticular activating system: A part of the brain that plays a key role in arousal.
- Autonomic nervous system: The part of the nervous system responsible for control of the bodily functions not consciously directed, such as breathing, the heartbeat, and digestive processes.
- Endocrine system: The collection of glands that produce hormones that regulate metabolism, growth and development, tissue function, sexual function, reproduction, sleep, and mood, among other things.
External links
- Medical encyclopedia article on Arousal
- Wikipedia's article - Arousal
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