Biological Contribution - Brain Scanning Techniques
- Created by: Laura
- Created on: 04-05-13 13:30
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- Biological - Brain Scanning
- Ideas/Theories
- PET
- changes in metabolism
- radioactive tracer injected
- function - blood flow
- functional scans
- MRI
- uses magnetic field to take photo inside body
- structural scans
- remove all metal objects
- used for injury/tumor of soft tissue
- PET
- Who/How it's helped
- PET = find functional abnormalities & comparisons
- e.g Sz + non Sz
- MRI = find structural abnormalities & comparisons
- e.g brains of drug users + non-users
- allows accurate diagnosis = effective treatment + see effects
- non invasive way of learning about brain
- PET = find functional abnormalities & comparisons
- Strong
- scientific = valid tool for diagnosis + comparisons made
- objective method
- scans help confirm/generate hypothesis
- Raine et al = murders have decreased flow to frontal lobe
- ethical - non invasive = no damage
- Weak
- can not infer cause and effect
- validity depends on interpretation of findings
- anxiety of patient may affect results
- truthfulness of drug use can affect validity
- distressing + small risk with PET due to radioacivity
- only test limited range of activities - patient has to remain still
- can not infer cause and effect
- Ideas/Theories
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