blended - brain scans Flashcards
1
Q
what is EEG used for
A
study of the brain electrical activity
2
Q
The advantages of EEG are:
A
- It’s non-invasive
- cheap
- shows changes in brain activity.
- no big magnetic fields
3
Q
The disadvantages of EEG are:
A
- only works for cortex
- no brain image
- cannot identify the synapses where drugs may act.
4
Q
what is CT scanning for
A
CT scan produces better quality images of bones and tumours than other types of scan
5
Q
Advantages of CT scanning:
A
- quick
- can be viewed from different angles
- high contrast images
6
Q
disadvantages of CT scanning:
A
- patient must stay still
- uses x-ray radiation
7
Q
what is MRI scanning for
A
more detailed scans than ultrasound or CT scans.
8
Q
what is fMRI scanning for
A
measures brain activity by detecting changes associated with blood flow.
9
Q
advantages of MRI/fMRI
A
- no ionising radiation
- clearer image that CT
- fMRI shows brain activity
10
Q
disadvantages of MRI/fMRI
A
- strong magnetic field
- time consuming
- need to be still
- claustrophobia
- noisy
11
Q
what is PET scanning for
A
tracers will collect in areas of higher chemical activity
12
Q
advantages of PET scanning
A
- biochemical changes in brain can be detected
13
Q
disadvantages of PET scanning
A
- patient exposed to gamma radiation
- scan must be done quickly before isotope decays
