Unit 5: States of Consciousness and Unit 6: Learning Flashcards
consciousness
awareness of ourselves and environment
What are the different states of consciousness?
sleeping dreaming drug use hypnosis meditation
sleep
state of consciousnesss where person is relatively inactive and inattentive to stimuli
NREM sleep
4 sleep stages dominated by theta and delta waves
What are the four types of brain waves?
beta: alert (short and rapid)
alpha: relaxed
theta: light sleep
delta: deep sleep (slowest brain waves)
Stage 1 of sleep cycle
light sleep
shortest cycle
theta waves dominate
Stage 2 of sleep cycle
relaxation
muscles contract and relax
heart rate, breathing, and body temperature decrease
theta waves still dominate
sleep spindles = brief burst of high frequency brainwaves
stage 3 of sleep cycle
slow wave sleep begins
delta waves emerge but are less than half of present brain waves
stage 4 of sleep cycle
slow wave sleep
deepest sleep stage
delta waves dominate and are more than half of present brain waves
stage where physical and psychological recovery occurs
REM sleep
deel sleep where brain very active, beta waves dominate, rapid eye movements occur, and dreaming happens
sleep cycle
consists of NREM 1, 2, 3, 4, then REM sleep and repeat in 90 minute cycles
REM sleep becomes longer and NREM 3 sleep becomes shorter as night goes on
circadian rythm
daily routine of body controlled by internal clock
Why is sleep important?
repairs and restores mind and body (restorative theory)
energy conservation (energy conservation theory)
increases cognition and development
allows dreaming
sleep disorder
condition affecting ability and quality of sleep
What are the types of sleep disorders?
insomnia: inability to sleep
sleep apnea: difficulty breathing during sleep
narcolepsy: too much sleepiness and sleep attacks
parasomnias
undesired events occuring during sleep
What are the types of parasomnias?
nightmares: bad dreams
somnambulism: activity during sleep; sleep walking
night terrors: sudden awakening from sleep terrified
dream
experience of images, thoughts, and emtions due to brain activity during REM sleep