A state of behavioural or physiological activation.
Term to describe physiological activation, such as increased brain activity, autonomic responses, sweating, or muscle tension. go to glossary index
An abrupt change from a "deep" stage of NREM sleep to a "lighter" stage, or from REMS to awake, with the possibility of awakening as the final outcome. Arousal may be accompanied by increased tonic EMG activity and heart rate, as well as body movements.
An interruption of sleep lasting greater than 3 seconds.
A state of sexual excitement. ("I became aroused from watching the porno tape.")
Activation in any of the body's systems (e.g., activation of the sympathetic nervous system or the cerebral cortex). Arousal as a general term has resisted definition, because sometimes one system is activated while another is not.
A person's level of psychological and physiological activation, ranging from deep sleep to high excitement.
a state of heightened physiological activity
"Partial" arousal is an abrupt change from a "deep" stage of NREM sleep (stage 3-4) to a "lighter" one (stage 2 or 1). "Full" arousal means awakening. During an arousal, your muscle tone increases, your heart may beat faster and you may move.
Sexual excitement and stimulation.
An abrupt change from a deeper sleep stage to a lighter sleep stage, with the possibility of awakening as a final outcome; Arousal may be accompanied by increased muscle tone and heart rate as well as body movement
Abrupt change from sleep to wakefulness, or from a "deeper" stage of non-REM sleep to a "lighter" stage
Being awake. Primitive state of alertness managed by the reticular activating system (extending from medulla to the thalamus in the core of the brain stem) activating the cortex. Cognition is not possible without some degree of arousal.
An abrupt change from a "deeper" stage of NREM sleep to a "lighter" stage, or from REM sleep toward wakefulness, with the possibility of awakening as the final exit come. Arousal may be accompanied by increased tonic EMG activity and heart rate as well as body movements.
The psycho-physiological phenomenon which excites the central nervous system, enabling high intensities and movement qualities. (See also MOTIVATION)
the stimulation of the brain, causing the subject to go from deep to a lighter level of sleep. This can be easily detected during a sleep study as a change in sleep stage. Arousal can be due to low blood oxygen, high blood carbon dioxide, jerky leg movements, or environmental factors such as loud noises.
The body's readiness for action. A low state of arousal is accompanied by feelings of lethargy or sleepiness, whereas a high state of arousal is accompanied by feelings of energy and excitement. Physiological features of low arousal include slow heart rate, low blood pressure, slow respiration, low cellular glucose uptake. Compare attention.
Stimulation of sexual interest. Also, the second stage of the sexual response cycle.
Levels of activity from alertness to drowsiness.
awakening from sleep. Also sometimes refers to a change from a "deeper" stage of non-REM sleep to a "lighter" stage
Arousal is a physiological and psychological state involving 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 alertness and readiness to respond.