Sleep-wake cycle -- 24-hour cycles that are part of the body's internal clock.
What are circadian rhythms?
State of consciousness in which the person is especially susceptible to suggestion.
What is hypnosis?
This sleep disorder is most common in children, and it involves doing random activities while in the state of sleep, such as climbing out of a window or talking.
What is sleepwalking?
A sleep disorder characterized by difficulty in falling asleep or remaining asleep.
What is insomnia?
This part of the brain processes sensory information about one's surroundings. Activity in this part of the brain slows down during meditation.
What is the parietal lobe?
The effect of time shifts on circadian rhythm.
What is jet lag?
This is a period of inactivity accompanied by a significant decrease in body temperature that occurs in some warm-blooded vertebrates.
What is hibernation?
This psychologist's dream theory suggests that dreams are an expression of wish fulfillment.
What is Sigmund Freud?