Chapter 6 - Consciousness Flashcards
Consciousness
Self-awareness and stream of flowing thoughts
States of consciousness
Level of awareness of our extrernal surroundings
Contents of consciousness
Specific thoughts we are aware of
Inattention blindness
We don’t notice something even though it is detectable because we weren’t paying attention (gorilla video)
Reticular formation
helps us be awake and conscious
Thalamus & hypothalamus
Information processing
Cerebral cortex
important for the awareness aspects of consciousness
Damage to reticular formation
loss of consciousness
Damage to hypothalamus
Disturbance of alertness
damage to thalamus
lack of conscious awareness
damage to cerebral cortex
lack of awareness
When does conscious awareness develop?
18 months
When does full conscious awareness develop?
22 months
Preconsciousness
level of awareness which information can become readily available
Automatic behaviors
processes are easy to bring to mind (brushing teeth)
Unconscious state
information is not easily accessible
Explicit memory
knowledge we are fully aware of
Implicit memory
knowledge we have stored we are not aware of
Adaptive theory of sleep
organisms sleep for self-preservation (hide from predators)
Restoration theory of sleep
we sleep to restore brain and body
Circadian rhythm
biological clock - patterns of feelings sleepy or aware that can correspond to daylight and night
Suprachiasmatic nucleus
group of neurons responsible for coordinating rhythms of the body
Why does artificial lighting have an impact on sleep quality?
photoreceptors send message to SCN about daylight - releases dopamine and melatonin keeping you awake
How long is a sleep cycle
90-100 min
How many stages does one cycle have
5 stages
Stage 1
a few minutes - alpha waves change to theta waves - transition from wakefulness and sleep
Stage 2
15 - 20 mins - more relaxed - sleep spindles
Stage 3
Deep sleep - delta waves
Stage 4
low heart rate, blood pressure, and breathing
What stage of sleep is sleepwalking likely?
Stage 4
Stage 5
REM sleep
What is the pre-sleep period also known as
Hypnagogic state
Hypnagogic state
Alpha waves, hallucinations, jerks
REM sleep
jagged brain wave patterns
increased heart rate
irregular breathing
dreaming
Information processing theory of dreaming
dreams can help us solve problems and process information from the day
Freudian dream theory
Dreams express our unconscious wishes and desires
nightmares
dreams filled with intense anxiety
dream disorder anxiety
frequent distressing nightmares
lucid dreams
sleeper can control dreams and are aware when dreaming
Day dreams
fantasies that occur while awake but not fully conscious
What age group spends more time REM
Children - due to development
Insomnia
Difficulty staying asleep and going to sleep
Common in older people with medical conditions
Most common sleep disorder
insomnia
Second most common sleep disorder
sleep apnea
Sleep apnea
stops breathing during sleep causing multiple awakenings
Which sleep disorder can cause cardiac arrest
sleep apnea
excessive daytime sleepiness
chronically tired even after well rested
narcolepsy
urge to fall asleep, suddenly falls into rem sleep (15 mins)
delayed sleep phase syndrome
long delay in ability to fall asleep
Advanced sleep phase syndrome
can only all asleep between 6-9pm and 2-5am
Restless leg syndrome
urge to move legs before sleeping
periodic limb movements of sleep
strong urge to move legs during sleep
when is sleepwalking most likely to occur
during first three hours of sleep
night terrors
child wakes up in panic and instantly goes back to bed
cause of insomnia
stress
Which sleep disorders can be caused by genetics
Night terrors, narcolepsy
Which stages of sleep do night terrors occur in
3 and 4
REM sleep behavior disorder
acting out a dream in bed while sleeping
Which sleeping disorder does not have a cure
Narcolepsy
Which sleep disorder is inherited
sleepwalking
Hypnosis
altered state of consciousness which includes:
relaxation, and intense focus
Divided consciousness theory
awareness splits in two
1) responds to hypnotists suggestion
2) processes pain less consciously
Social/cognitive theory
participant believes in hypnosis and works hard to ignore the pain
psychoactive drugs
chemicals that affect awareness, perception, and mood
addiction
psychological or physical urge to take a drug
tolerance
needing larger doses to get the sam effect
withdrawal symptoms
side effects of reducing intake of a drug after addiction
depressants
slows the activity in the CNS to reduce tension
sedative-hypnotics
produces relaxation and drowsiness - relieves anxiety
opioids
reduces pain and emotional tension - produces calming feelings
examples of opioids
heroin, morphine, codeine and OxyContin
examples of sedative-hypnotics
xanax, ativan
Stimulants
increases activity of the CNS
Examples of stimulants
caffeine, nicotine, cocaine, amphetamines
Cocaine
increase energy and alertness reduces memory, attention, decision making
amphetamines
increase energy and alertness and reduce appetite
Hallucinogens
produce perceptual distortions called hallucinations
Examples of hallucinogens
LSD, Cannabis
LSD
strengthens visual perceptions (illusions and hallucination)
Cannabis
Produces a mixture of hallucinations, depressants, and stimulant effects
Reward-deficiency syndrome
people might abuse drugs because their reward centre is not activated by usual life events
Example of cannabis
marijuana