Scans

Question 1

Structural imaging

Answer 1

Static image of brain> ns struc= diagnosis intracranial disease eg tumour and injury
CT

Question 2

Ao1 CT scan

Answer 2

Series x-ray beams head multiple angles
Comp= cross sec images of struc
Low res, major strut prob eg tumour

Question 3

Ao3 CT

Answer 3

+ quick= acc detail of struc= better understanding of dev
- no details on func and risks of radiation

Question 4

Functional imaging

Answer 4

Images of brain activity
Diagnosis of metabolic disease eg Alzheimer’s
PET , fMRI

Question 5

Ao1 PET

Answer 5

Measure activity by tracking loc glucose usage
Radio tracer binds to glucose= activ= more glucose and concentrated radiation detected by scanner
High activ= bright

Question 6

Ao3 pet

Answer 6

+ spec areas inv in exp and evidence for localized func
- radioactive injection invasive, potential damage cells, allergy fdg= limits use of scans
Can’t see actual damage

Question 7

AO1 fMRI

Answer 7

radiofreq energy and magnetic field to measure blood o2 lev in brain
most active= utilise most o2
high res 3d image

Question 8

a03 fMRI

Answer 8

• perfectly still> diff for anxiety
• not for metal surgical implants due to high mag fields
  + clear images>ACTIVE areas in given task

Question 9

overall strength

Answer 9

I reliable due to objective measurablity
J raine et al
E compare mst w observed behaviours+ connections betw brain areas and behaviours

Question 10

overall weakness

Answer 10

I rely on rad and mag = patients still
J not viable for child, metal implants
E not suitable to inv brain in all cases