Sleep and Consciousness

Consciousness

awareness of yourself and surroundings.

Circadian Rhythm

body’s 24-hour sleep/wake cycle.

Types of Consciousness

different awareness levels (awake, asleep, dreaming).

Disruptions to Circadian Rhythm

like jet lag, when sleep schedule is off.

Sleep Stages

levels of sleep shown by EEG brain waves.

NREM Stage 1

light sleep, drifting off.

Hypnagogic Sensations

falling or floating feelings when falling asleep.

NREM Stage 2

slightly deeper sleep with sleep spindles.

NREM Stage 3

deep sleep; body restores and repairs itself.

REM Sleep

vivid dreaming; brain active, body paralyzed.

Dreaming

images, thoughts, and feelings during sleep.

REM Rebound

extra REM after being sleep-deprived.

Activation-Synthesis Dream Theory

dreams are the brain’s way of making sense of random signals.

Consolidation Dream Theory

dreams help store and organize memories.

Sleep Function

helps restore energy and strengthen memory.

Sleep Disruption Effects

tiredness, poor focus, mood swings.

Sleep Disorders

problems that interfere with normal sleep.

Insomnia

trouble falling or staying asleep.

Narcolepsy

suddenly falling asleep randomly.

REM Sleep Behavior Disorder

acting out dreams.

Sleep Apnea

stops breathing during sleep.

Somnambulism

sleepwalking during deep sleep.