Sleep, Dreams And Body Rhythms Flashcards
What is a circadian?
Biological rhythm that occurs approximately every 24 hours.
What is consciousness
Awareness of yourself and your environment.
What is an ultradian rhythm?
Biological rhythm that occurs more than one day
What is an infradian rhythm?
Biological rhythm that occurs once a month or once a season
What happens when we do not get enough sleep?
Lack of sleep decreases levels of hormones that are necessary for our immune system to function properly. It increases the levels of stress hormone, cortisol, which has been linked to the damage of brain cells that are responsible for learning and memory. It may contribute to hypertension, impaired concentration, irritability, and may increase appetite.
How do we sleep?
The control center for a 24 hour sleep rhythm seems to be in the hypothalamus. It can recognize light and dark and when it sees the change in light it can send messages to your brain and body to cause changes that initiate sleep. These changes often include the increase or decrease of hormones in your bloodstream.
What is melatonin?
The hormone that helps regulate the sleep wake cycle. It builds up while you were sleeping but as soon as you turn the light on the level start to lower until you go to sleep again.
Why do we sleep?
For two reasons, preservation and restoration. Preservation is the theory that sweet provides protection from night times dangers. Restoration is the theory that sleep allows us to recuperate from daily wear and tear. Though your brain remains active brain tissue gets repaired and restored while you sleep. Memories are consolidated and things learned the previous day a re-organized
Explain stage one of sleep
This stage lasts only five minutes. There is slowed breathing, irregular brain wave patterns and you may not realize that you are asleep.
What happens during stage two of sleep?
Your brain waves cycle more slowly. You will spend over half of your night asleep in the stage.
What happens during stages three and four?
About 30 minutes after you fall asleep the rain will start to slow way down. These rejuvenating sleep stages will last about 30 minutes you cycle back-and-forth between stage 2, 3, 4 and REM.
Explain REM sleep
Your brain waves will pick up a little strength and speed. This is a recurring sleep stage during which your eyes move rapidly under the lids and you dream vividly.
What happens to you during REM sleep?
You dream vividly, wave patterns are similar to a person who is awake, pulse and breathing quickens.
What is paradoxical sleep?
Happens during REM sleep when your muscle movement gets blocked so that you may not act out your dreams.
Who coined the earliest dream. And what did it mean?
Sigmund Freud said that dreams where the key to understanding inner conflict. They represented wish for filament and could be tracked back to a Roddick wishes.
