blended - brain scans

Question 1

what is EEG used for

Answer 1

study of the brain electrical activity

Question 2

The advantages of EEG are:

Answer 2

• It’s non-invasive
• cheap
• shows changes in brain activity.
• no big magnetic fields

Question 3

The disadvantages of EEG are:

Answer 3

• only works for cortex
• no brain image
• cannot identify the synapses where drugs may act.

Question 4

what is CT scanning for

Answer 4

CT scan produces better quality images of bones and tumours than other types of scan

Question 5

Advantages of CT scanning:

Answer 5

• quick
• can be viewed from different angles
• high contrast images

Question 6

disadvantages of CT scanning:

Answer 6

• patient must stay still
• uses x-ray radiation

Question 7

what is MRI scanning for

Answer 7

more detailed scans than ultrasound or CT scans.

Question 8

what is fMRI scanning for

Answer 8

measures brain activity by detecting changes associated with blood flow.

Question 9

advantages of MRI/fMRI

Answer 9

• no ionising radiation
• clearer image that CT
• fMRI shows brain activity

Question 10

disadvantages of MRI/fMRI

Answer 10

• strong magnetic field
• time consuming
• need to be still
• claustrophobia
• noisy

Question 11

what is PET scanning for

Answer 11

tracers will collect in areas of higher chemical activity

Question 12

advantages of PET scanning

Answer 12

• biochemical changes in brain can be detected

Question 13

disadvantages of PET scanning

Answer 13

• patient exposed to gamma radiation
• scan must be done quickly before isotope decays