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The brain is stimulated and is believed to help develop & preserve neural pathways.

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dreams that repeat themselves with little variation

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Dreams are random due to the firing of neurons in your brain.

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We dream about the things and memories we have throughout the day.

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when you realize you’re dreaming and may control them

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level of consciousness between sleep & wakefulness

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Your dreams are the wishes you wish to fulfill in real life.

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circadian rhythm is a roughly 24 hour cycle in the physiological processes of living beings

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Impairs decision making, reasoning, concentration, problem solving

Risk of developing neurological & psychiatric disorders

Schizophrenia

Alzheimer's

Anxiety & addiction disorders

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Higher risk of heart disease

3x more likely to develop diabetes

Higher risk of depression

Obesity

Colorectal cancer

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Drowsiness

Lower productivity

cranky / irritable

Dark circles under eyes

Increased hunger in bad foods = weight gain

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Improved focus

Better memory

Tissue regeneration (athletes!)

Lower risk of depression

Improved quality of life

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During the REM stage, the paralysis that occurs naturally is absent or incomplete. The person during this usually acts out their dreams which can be vivid, intense, or violent. In some cases, people have killed other people while this is occuring.

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Sudden waking up with episodes of screaming, sweating, confusion, and then returning back to a deep sleep. It occurs during the non-REM stage.

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Walking while completely asleep. When sleepwalking, they do not respond they are also dazed and clumsy. It is often because they have a lot on their mind or they are stressed out, so they act out what needs to be done.

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During sleep the pituitary gland releases growth hormone. Older people recieive less of this hormone and sleep less.

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Sleep restores our recent as well as past memories.

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Caused by a blockage in the airway during sleep. Symptoms include, loud snoring, gasping for air, stops breathing for more than 20 seconds. It can be treated with a CPAP Machine.

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Sleep helps restore and repair brain tissue.

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Sleeping in the darkness when predators loomed about kept our ancestors safe.

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Caused by a decrease in hypocretin which controls appetite and sleep patterns. Can be hereditary. It is also a nervous system disorder, not mental. Cataplexy is the complete loss of muscle control. Narcolepsy is when a person falls alseep instantly.

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Can be characterized by trouble falling asleep, waking up too early in the morning, or trouble falling asleep after being awake the whole night.

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The brain becomes more active but the body becomes more relaxed and immobilized. The stage where dreams occur and eyes move rapidly.

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The muscles begin to relax, blood pressure and breathing rate drop. This is where the deepest sleep occurs.

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The body temperature drops and the heart rate begins to slow down. The brain begins to produce sleep spindles. This process lasts about 20 minutes.

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The transition period between being awake and going to sleep, usually takes about 5-10 minutes.