Which technique measures changes in blood flow to areas of the brain while a person performs a task?
fMRI Scan
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Which brain scanning method detects electrical activity in the brain?
An EEG
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Which technique may only be used on patients who are dead?
Post-Mortem examinations
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Why do fMRI machines measure blood flow to areas of the brain?
Using muscles in certain areas increases the demand for oxygen -> measuring blood detects the oxygen carried by red blood cells
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How is an ERP different from an EEG?
EEG: researcher tracks electrical impulses in the brain.
ERP: researcher presents the patient with a stimulus and then uses small voltage changes to identify their response.
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What can you do with a fMRI brain scan?
Map the areas of the brain that are involved in particular mental activities
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What are the four basic EEG patterns?
Alpha, Beta, Delta and Theta waves -> these are all found when we are asleep
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What are the strengths of an fMRI scan?
- non-invasive (no radiation or invasive instruments)
- more objective and reliable than verbal reports
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What are the weaknesses of an fMRI scan?
- it doesn't take a direct measure of brain activity because it only measures blood flow
- overlooks connectivity of the brain and focusses on localisation of function.
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Other cards in this set
Card 2
Front
Which brain scanning method detects electrical activity in the brain?
Back
An EEG
Card 3
Front
Which technique may only be used on patients who are dead?
Back
Card 4
Front
Why do fMRI machines measure blood flow to areas of the brain?
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