One important regulator of sleep-wake cycles is the hormone melatonin. For example, most people sleep during the night and are awake during the day. Circadian cycles are aligned with the outside world. Alertness is associated with higher body temperatures and sleepiness with lower body temperatures. A circadian rhythm is a biological rhythm that takes place over a period of about 24 hours. Changes in body temperature and alertness that fluctuate cyclically over a 24-hour period are examples of a circadian rhythm. We might also experience unconscious states of being via drug-induced anesthesia for medical purposes.īiological rhythms govern states of consciousness. In between these extremes are states of consciousness related to daydreaming, intoxication as a result of alcohol or other drug use, meditative states, hypnotic states, and altered states of consciousness following sleep deprivation.
Wakefulness is characterized by high levels of sensory awareness, thought, and behavior.
DEEP SLEEP BRAIN WAVES FULL
Consciousness can be viewed as a continuum that ranges from full awareness to deep sleep. Awareness of internal stimuli includes feeling pain, hunger, thirst, sleepiness, and being aware of our thoughts and emotions. Consciousness describes our awareness of internal and external stimuli.
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