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A mindmap containing a description and evaluation of PET scans. It's part of the Edexcel AS-level Psychology syllabus. It's Unit 2, part of the Biological Approach.
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sociology and psychology
Mind Map by
, updated more than 1 year ago
over 9 years ago
Positron Emission Tomography
Hotspots in the brain measured. Can find out which parts working at particular time.
Radioactive tracer added to chemical, injected into arm vein.
Tracer provides small, positively charged particles (positrons)
Give off signals that're recorded
Areas in the brain that use more glucose = more active, showing a more red colour.
People can be scanned while performing different activities. shows what area of brain is responsible for different functions.
Helps to understand communication in the brain.
Can see a picture of a working brain
Show malfunction, identify damage/tumours
No risk of infection
There are ethical concerns as it's an invasive procedure (the tracer being injected)
Informed consent is needed and good reason is needed for the scan.
The scan is distressing
It's hard to isolate different brain functioning precisely even though activity shows in the image
Scans are broad in their imaging, things are hard to pinpoint
Can only a couple of scans in lifetime
Can't have one if pregnant/breastfeeding
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