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Ways of studying the brain
Quiz by
jamieokeeffe726
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Last updated: October 21, 2023
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First submitted
October 4, 2023
Times taken
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Average score
27.7%
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FMRI
functional magnetic resonance imaging
Description
detects changes in blood oxygenation and flow
an active brain area consumes more oxygen
produces 3d images which are activation maps
Strengths
non invasive doesnt use radiation 1
no instruments inserted directly into the brain 1
virtually risk free so more participants 1
high spatial resolution 1 to 2mm
Limitations
poor temporal resolution 1 to 4 seconds
unable to accurately predict the onset of brain activity
cant hone in on activity of individual neurons
not a direct measure of neural activity
expensive
EEG
electroencephalogram
Description
measures electrical activity within the brain via electrodes
overall account of brain activity
diagnose epilepsy and sleep disorders
the scan recording represents the brainwave patterns from millions of neurons
Strengths
non invasive doesnt use radiation 2
no instruments inserted directly into the brain 2
virtually risk free so more participants 2
high temporal resolution 1 millisecond
cheap
Limitations
lack of precision
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Answer
cant distinguish where the activity originates from
difficult to draw conclusions
uncomfortable for participants
not representative
ERP
event related potentials
Description
recording of general brain activity
filters out extraneous brain activity from original eeg recording
records the types of brain wave triggered by particular events
Strengths
responses which relate to a specific stimulus
excellent temporal resolution
can establish cause and effect
Limitations
lack of standardisation in the methodology
background noise and extraneous variables must be eliminated
Post Mortem Examinations
likely to be used when the person has a rare disorder
areas of damage are examined to find the cause
comparison to a neurotypical brain
Strengths
detailed examination of anatomical structure and neurochemical aspects
can access the hypothalamus and hippocampus which other techniques cant
insights into deeper brain regions
used as a basis for future research
Limitations
difficult to establish causation
extraneous factors may influence brain structure
ethical issues such as informed consent
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