Consciousness
Awareness of internal and external stimuli
How did James view consciousness?
as a stream
How did Freud view consciousness
feelings and behaviors of the conscious mind are influenced by unconscious thought
Electroencephalograph
monitoring of the brain’s electrical activity via brainwaves
What are the 4 EEG patterns, their frequencies, and what state of consciousness are they associated with
Beta, 13-24 Hz, normal awake thoughts
Alpha, 8-12 Hz, deep relaxation
Theta: 4-7 Hz, light sleep
Delta, 4 Hz, Deep sleep
What is Sleep?
periodic loss of consciousness, different from coma/anesthesia
Circadian Rhythm
Internal biological clock, body warms in morning, peaks in day, dips in afternoon, drops in evening, altered by age and experience
How many sleep stages are there?
5
Sleep Stage 1
short transitional stage, 1-15 mins, alpha and theta waves
Sleep Stage 2
sleep spindles 10-25 mins
Sleep Stage 3-4
slow wave sleep (30 mins)
Stage 5
Rem Sleep (rapid eye movement) dreams happen here mostly
What does low Gaba lead to
sleepwalking
Sleep stage order
1,2,3,4,5,4,3,2,5,2,3,4, etc
What does high gaba lead to
Sleep paralysis
What is GABA
an inhibitory neurotransmitter that helps promote sleep
Jet Lag
tiredness after flying across a time zone, circadian rhythm is off
Shift work
working outside the normal 9-5 shift throws off circadian rythym
What happens to our need for REM sleep as we get older?
it lessens
Why do we sleep?
-protective role
-regeneration and repair
-strengthen neural connections
-promotes creativity and problem solving
-growth hormone
Consequences of sleep depravation
-weight gain
-suppress immune cells that battle infection
-decreases lifespan
-accident proneness
-inability to pay attention
Insomnia
chronic problem with getting not enough sleep
Narcolepsy
falling asleep suddenly during normal waking periods
Sleep Apnea
reflexive gasping for air that wakes you up
