Circadian Rhythm

Consciousness

the state of being aware & able to perceive thoughts, feelings, sensations & surroundings

Circadian Rythmn

• internal process that regulates the sleep/wake cycle & repeats every 24 hours

• influences alertness, hormone release, body temp

Jet Lag

• temporary disruption of body circadian rhythm due to rapid travel across multiple time zones

• results in fatigue, sleep disturbances, difficultly concentrating

Shift Work

employment schedules that require working outside of typical daytime hours disrupting the body’s natural CR

NREM Stage 1

• drifting in and out of sleep

• lasts a few min

• slow brain waves, muscles relax

• hypnic jerks may occur

NREM Stage 2

• light sleep lasting abt 20 min

• slow brain waves with sleep spindles & k complexes

NREM Stage 3

• deepest stage

• presence of mostly delta waves

• restoration of resources- brain & body replenish energy; promotes physical & mental wellbeing

REM Sleep

• sleep characterized by rapid eye movements, vivid dreams & muscle paralysis

• increased brain activity (dreaming)

• memory consolidation & emotional processing

REM Rebound

• increases the time spent in REM sleep after a period of REM deprivation

• results in intense & frequent REM sleep episodes

Activation-Synthesis Theory

• theory that dreams are the result of random neural activity in the brainstem during REM sleep

Consolidation Theory

• suggests that dreams plays a role in the memory consolidation & processing of memories

Insomnia

• difficulty falling asleep, staying awake or experiencing restorative sleep

Narcolepsy

• excessive daytime sleepiness, sudden episodes of muscle weakness, sleep paralysis & hallucinations

Sleep Apnea

• pauses in breathing or shallow breathing during sleep

REM Sleep Behavior Disorder

individuals act out their dreams during REM sleep

Somnabulism

• walking or performing other activities while still asleep