AOS 3 - How do levels of consciousness affect mental processes & behaviour Flashcards
psychological construct
- info provided by individual
- behavior that’s demonstrated
- psychological changes that can be measured (heart rate)
consciousness
can be defined as our awareness of objects & events in the external world & of our sensations, mental experiences & own experience at any given moment
consciousness is
- personal
- continuous
- changing
- selective
consciousness across a continuum
TOTAL AWARENESS focus attention normal wakefulness daydreaming meditative state hypnotized asleep anesthetized come COMPLETE LACK OF AWARENESS
normal waking consciousness
NWC refers to the states of consciousness associated with being awake & aware of objects & events in the external world & of one’s sensations, mental experiences & own existence
altered state of consciousness
are any state of consciousness that’s distinctly different from NWC in terms of the level of awareness & experience
naturally occurring & induced ASCs
sleep, daydreaming - natural
mediation, head trauma-induced
attention
a concentration of mental activity that involves focusing on a specific stimulus while ignoring & thus excluding other stimuli
selective attention
involves choosing & attending to a specific stimulus to the exclusion of others
divided attention
refers to the ability to distribute our attention & undertake 2 or more activities simultaneously
- control limitations
- in NWC we’re able to exercise some control over what enters our consciousness, we can block our awareness of info that makes us sad,angry
- during ASC we don’t have control over what enters our consciousness, dreams
- controlled process
involves conscious alert awareness & mental effort in which the individual actively focuses their attention on a particular goal
- automatic processes
an automatic process requires little conscious awareness & mental effort, minimal attention & doesn’t interfere with the performance of other activities
- perceptual & cognitive distortions
- an ASC can make someone more receptive to external stimuli or dulls them to such an extent they’re not experienced at all
- Cognitive functioning also tends to be impaired in an ASC, thought processes are often more disorganized
- emotional awareness
- ASCs appear to sometimes put an individual’s feelings into a state of turmoil, resulting in uncharacteristic responses, some people resort feel emotionless
- self-control
- changes in our ability to maintain self-control evident in ASC
- time orientation
estimation of time is frequently distorted in an ASC, and seems to pass at a different speed than normal
- measurement of physiological responses
enables researchers to obtain data on bodily changes & responses during various states of consciousness
EEG
is a device that detects, amplifies & records general patterns of the electrical activity of the brain over time. frequency & amplitude
beta waves
associated with alertness & intensive mental activity, associated with NWC. high frequency, low amplitude
alpha waves
associated with physical relaxation, internally focsued, eyes closed. medium/high frequency & low amplitude
frequency & amplitude
frequency - refers to the number of brain waves per second
amplitude - refers to the intensity of brain waves & can be measured through peaks & troughs usually seen in an EEG
theta waves
associated with drowsiness, falling asleep just before waking, and deep meditation. medium frequency some low and high amplitude waves
delta waves
associated with deep dreamless sleep, low frequency, high amplitude
fastest - slowest activity
beta
alpha
theta
delta
drug
any substance that can change a person’s physical and/or mental functioning certain types of drugs can induce an ASC & changes in brain wave patterns
factors affecting depressants & stimulants affect
- type
- dose & strength
- personal characteristics
- methods of administration
stimulants
drugs that increase activity in the CNS & the rest of the body, thus have an alerting, activating affect
brain wave patterns due to stimulants
- increase in higher frequency activity
- increased beta waves, decreased delta, alpha and theta
depressants
drugs that decrease activity in the CNS & rest of the body
brain wave patterns due to depressants
increase in lower frequency activity reduced beta waves & increased delta, theta & alpha
EMG
used. to detect, amplify & record the electrical activity of muscles. EMG recordings generally show the strength if electrical activity occurring in the muscles, indicating muscles activity
EOG
measures eye movements of eye positions by detecting, amplifying & recording electrical activity in eye muscles that control eye movements
- measurement of speed & accuracy on cognitive tasks
speed & accuracy are tested are 2 commonly tested objective measures when completing cognitive tasks
- subjective reporting of consciousness - sleep diaries
- a self-report is the participant’s written or spoken responses to questions, statements,s or instructions presented by the researcher considered to be subjective
- sleep diaries are often used in the study of sleep, a sleep diary is a self-reported record of an individual’s sleep and waking time activities
- video monitoring
most commonly used in the study of sleep & sleep disturbances or disorders. responses that may be recorded - change in body position, amount of tossing.
sleep
sleep is defined as a reversible behavioral state of perceptual disengagement from & unresponsive to the environment.
circadian rhythm
involves changes in bodily functions or activities that occur as part of a cycle within a duration of about 24 hours, daily human sleep-wake cycle
the suprachiasmatic nucleus (SCN)
- light is the main cue that influences sleep-wake. area of the hypothalamus called SCN receives info about the amount of light & adjusts the sleep-wake cycle accordingly
- does this by sending messages to the pineal gland to secrete more or less of the hormone melatonin.
- when less light more melatonin is secreted = greater drowsiness
ultradian rhythms
involves changing in bodily functions or activities that occur as part of a cycle shorter than 24 hours, stages of sleep
stage 1 - NREM
occurs as drift into sleep, gradually lose awareness, may occur after REM sleep after arousal, from stages 2 - 4
- decrease in heart rate, body temp
- regular theta waves, mix with alpha waves
- 5 mins on average
- 5% of sleep time
stage 2 - NREM
period of light sleep & is usually seen as the point of ; truly sleep’, less easily disturbed than stage 1
- predominately theta waves
- 10 - 25 mins, lengthens in each cycle
- 45 - 55% of sleep time
stage 3 - NREM
start of the deepest period of sleep, blood pressure & body temp continue to drop, and lack of eye movement
- delta waves about 20 - 50%
- a few mins - 10 mins
- 3 - 8% sleep time
stage. 4 - NREM
the deepest stage of sleep, muscles completely relaxed
- delta waves more than 50%
- 20 - 40 mins in the first cycle, shorter & nonexistent in later cycles
- 10 - 15% of sleep time
REM sleep
characterized by spontaneous bursts of rapid eye movement where the eyes dart back and forth, heart rate faster, body temp rises, most dreaming occurs
- brain waves rapid, irregular mixed frequency activity
- 1 - 5 mins first cycle, 12 - 15 mins second cycle, 20 - 25 mins later
- 20 - 25% of sleep
restoration theory
purposes that sleep provides ‘time & out’ to help us recover from depleting activities during the waking time that uses up the body’s physical & mental resources
restorative functions of NREM sleep
important for restoring & repairing the body, physical growth, and tissue repair during stages 3 & 4
restorative functions of REM sleep
suggested to play an important part in brain development at a time when the brain is less occupied with the mental processes of everyday life (infant)
also linked with the consolidation of new memories
REM rebound
catching up on lost REM sleep immediately following a period of lost REM sleep by spending more time in it than usual
Evolutionary (circadian) theory
proposes that sleep evolved to enhance survival by protecting an organism by making it inactive during the part of the day when it’s most risky to move about
proportions of NREM & REM sleep across the lifespan
amount of light sleep consistent from ages 5 - 85 but the amount of deep sleep markedly decreases by old age
newborns & infants
- birth - 2 months - sleep onset may occur at any time & sleep episodes may last from 30 mins to 4 hrs, approx 50% REM sleep
- 2 - 3 months - experience longer periods of wakefulness in the daytime, longer night sleeps
- 6 months - 5 - 8 hrs a night
- 12 months - 14 - 15 hrs a day
young children
total sleep time decreases from 13 - 11 hrs between 2 & 5
REM sleep decreases NREM sleep increases
adolescents
total sleep decreases as does REM.
within NREM sleep stages 3 - 4 decline, stage 2 increases, and by late adolescence amount of deep sleep decreased by 40%
adults
average 8 hrs, 20 - 25% REM
- by age 60 severe reduction of stages 3 - 4
circadian rhythm phase disorders
a group of sleep disorders involving sleep disruption that’s primarily due to a mismatch between an individual sleep-wake cycle & the pattern that’s desired or required
sleep-wake cycle shift in adolescence
during adolescence timing of melatonin secretion that induces sleep onset peaks later, so adolescents are sleepier 1 - 2 hrs later
- typically likely to exert independence
- increase demand for socializing
- increase demand to study, work
sleep debt
sleep that’s ‘owed’ & needs to be made up because daily sleep requirements haven’t been met
shift work
a type of work schedule designed to meet the demands of a 24/7 society
- permanent night shift workers complain of sleepiness, poor quality of sleep
jet lag
a sleep disorder due to a disturbance to the circadian sleep-wake cycle caused by rapid travel across multiple time zones
sleep deprivation
is a general term to describe a state caused by an inadequate quantity or quality of sleep either voluntary or involuntary
partial sleep deprivation
involves having less sleep than what’s normally required can occur periodically or persistently over the short-term or long term
total sleep deprivation
involves not having any sleep at all over a short-term or long-term period of time
affective (emotional) functioning - effects of PSD
- a strong link between sleep deprivation & loss of ability to control emotions
- amplified emotional responses
- harder to accurately judge others’ emotions
- may feel provoked
behavioral functioning - effective sleepiness
- during daytime
- difficult in maintaining an alert state
- lack of energy
behavioral functioning - sleep interia
performance impairment that occurs immediately after awakening. the individual usually feels groggy and disoriented as they transition to being fully awake
- reaction times slow
- motor alertness low
behavioral functioning - microsleep
a brief period of sleep, lasting up to a few seconds
- a person usually has a fixed gaze
- may remain sitting or standing
- between 1 - 10 secs
cognitive functioning - PSD
- reduced ability to divide attention
- more likely to think illogically
- difficulty solving problems with creative thinking
- overlook details
sleep disturbance
used to refer to any sleep-related problem that disrupts an individual’s normal sleep-wake cycle
primary sleep disorder
is a sleep disorder that cannot be attributed to another condition such as a mental disorder to mental problem. the disorder itself is the main cause of disruption to the sleep-wake cycle
secondary sleep disorder
involves a sleep problem that’s a byproduct of our results from another condition. this could include back pain, breathing problem, anxiety or depression
dyssomnia - sleep onset insomnia
used to refer specifically to difficulty falling asleep at the usual sleep time but can usually sleep through the night once they’re asleep
insomnia
a sleep disorder that typically involves persistent difficulty initiating or maintaining sleep
symptoms - sleep onset insomnia
- occurs at least 3 times a week
- complaints of poor quality sleep
- not due to another sleep disorder
effects on sleep-wake cycle - sleep onset insomnia
- a common complaint that sleep occurs later than desired
- anxious, frustrated
- difficulty waking in the morning
sleepwalking
involves getting up from bed & walking about or performing other behaviors while asleep, actions may vary in type complexity & duration
sleepwalking behaviors
- eyes usually open
- may walk towards stimulus
- not be remembered usually
effects on sleep-wake cycle - sleepwalking
- typically occurs during the first 3rd of a sleep episode
- difficult to wake someone
- daytime fatigue
cognitive behavioral therapy
a type of psychotherapy that combines cognitive & behavioral therapies to treat mental health problems & disorders
cognitive component - before CBT
- ‘It’s already 2 am, I’m never going to fall asleep
- anxiety
- inadequate sleep quantity & quality
cognitive component - after CBT
- ‘Although I’m not sleepy now, I’ll fall asleep when my body is ready
- less anxiety
- more likely to fall asleep
behavioral component
- stimulus control therapy - begin to associate bed with falling asleep not with anxiety & stress
- sleep hygiene education involves providing info about practices that tend to improve and maintain good sleep & full daytime alertness
bright light therapy
involves timed exposure of the eyes to intense but safe amounts of light