biopsych ; scanning and other techniques
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- Created by: ilovetheoffice
- Created on: 30-05-18 13:22
FMRI
DFGDF
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works by detecting changes in?
blood oxygenation and flow
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that occur as a result of?
neural activity in specific parts of the brain
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what happens when brain area is more active?
consumes more oxygen
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and to meet this ncreased demand what happens?
blood flow directed to active area
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fMRI produces images of how many dimensions?
3
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showing which parts of brain are involved in?
particular mental process
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and this has important implications for our inderstainding of?
localisation of function
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EVALUATION
DFGD
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:) strengths
dgd
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doesn't rely on the use of?
radiation
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if administered correctly it's virtually?
risk free
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produces images with very high?
spatial resolution
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depicting detail by the?
mm
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and providing a clear picture of how?
brain activity localised
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:( weaknesses
dfgd
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is it spenny?
uh yeah that's why its in the waknesses
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why does it rely on the person to stay still?
only way it can capture a clear image
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why does it have poor temporal resolution?
5-second time lag
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can only measure blood flow and can't home in on what?
activity of individual enurons
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which can make it difficutl to tell?
exactly what kind of brain activity is being represented
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EEG
dfgf
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measures what in the brain?
electrical activity
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via?
electrodes in skull cap
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scan represents brainwave patterns generated from?
millions neyrons
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providin?
overall account brain activity
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often used by clinicians as?
diagnostic tool
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as unusual arrhytmic patterns of activity may indicate?
neurological abnormalities like epileps / tumors / sleep disoreder
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EVALUATION
DFGD
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:) strengths
dfgd
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invaluable in diagnosis of epileps characterised by?
random bursts activity easily detected on screen
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similarly contributed much to our understanding of?
sleep stages
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what is high unlike with FMRI?
tempora resolution
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can accurately detect brain activity @ how fast resolution?
millisecond
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:( weaknsses
dfgd
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what nature of info?
generalised
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not useful for doing what?
pinpointing exact source neural activity
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and doesn't allow rsrchers to distinguish between?
activities originating in adjacent but different locations
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ERPs
DGD
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what does EEG data contain in the overly general measure brain activity?
all neural responses associated to specific sensory / cog / motor events
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as such researchers have developed a way of doing what with these?
teasing out and isolating them
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what happens to all extraneous brain activity?
filtered out
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leaving only responses that relate to?
presentation of specific stimulus or performance tasts
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event-related potentials are?
types of brainwave triggered by particular events
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rsrch revealed many different forms of ERP and how these are linked to what?
cognitive processes like attention and perception
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EVALUATION
dfgd
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:) stengths
dfg
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bring about more what than raw EEG?
specificity to measurement
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bc they're derived from EEGs they have excellent?
temporal resolution
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which has led to widespread use in measurement of
cognitive functions and deficits
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like what in working memory?
p3000 component
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:( weaknesses
dfgdg
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pointed to lack of what in methodology?
standardisation
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which makes it difficult to do what with findings?
confirm
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a further issue is that what isn't always easy to achieve?
cancelling out all extraneous material for pure data
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POST-MORTEMS
DFG
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involves analysis of brain when?
after death (thats... that's kind of what post-mortem means)
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what kind of individual's brains are most liklely to be subject ot a post-mortem?
those with rare disorder and exp unusual deficits in mental processes / behaviour during lifetime
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areas of damage in brain examined after death as means of ding what?
establishing likely cause of affection in person suffered
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this may also involve comparison with neurotupical why?
ascertain extent of difference
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EVALUATION
DFGD
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:) strengths
dfgdf
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evidence from this vital in providing what?
foundation for early understanding of key brain processes
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broca and wernicke both relied on these studies to est links between?
lang / brain and behavioir
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post-mortems improve med knowledge and help generate?
hypotheses for future stury
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:( weaknesses
dfgdfg
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what is an issue here?
causation
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observed damage may not be linked to deficits but instead?
some other trauma incident
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further problem is what ethical issue?
consent
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dead patients can't provide what?
informed consent
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Other cards in this set
Card 2
Front
works by detecting changes in?
Back
blood oxygenation and flow
Card 3
Front
that occur as a result of?
Back
Card 4
Front
what happens when brain area is more active?
Back
Card 5
Front
and to meet this ncreased demand what happens?
Back
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