Topic 1.5 Sleep

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Consciousness

Awareness of yourself and your surroundings

Blindsight

The ability to respond to visual information without consciously seeing it due to damage to the visual cortex

Circadian Rhythm

The body's natural 24-hour cycle that regulates sleep and wakefulness

Restoration Theory

The theory that sleep allows the body and brain to rest and recover

Jet Lag

Tiredness and sleep problems caused by traveling across time zones and disrupting the body's internal clock

EEG Patterns

Patterns of electrical activity in the brain that change during different stages of sleep and wakefulness

NREM

Non-rapid eye movement sleep that includes lighter and deeper stages of sleep

Hypnagogic Sensations

Vivid sensations or experiences that occur while falling asleep

REM

Rapid eye movement sleep when most vivid dreaming occurs and the brain is highly active

REM Rebound

An increase in REM sleep after a period of REM sleep deprivation

Activation Synthesis Theory

The theory that dreams occur when the brain tries to make sense of random neural activity during sleep

Consolidation Theory

The theory that sleep helps strengthen and organize memories

Insomnia

A sleep disorder involving difficulty falling asleep or staying asleep

Narcolepsy

A sleep disorder that causes extreme daytime sleepiness and sudden sleep episodes

REM Sleep Behavior Disorder

A sleep disorder in which a person physically acts out dreams because normal muscle paralysis during REM sleep is reduced or absent

Sleep Apnea

A sleep disorder in which breathing repeatedly stops and starts during sleep

Somnambulism

Sleepwalking that occurs during deep NREM slee