Anatomy - Lab 9

Question 1

Where is the anterior commissure located?

Answer 1

Below the fornix

Question 2

Where is the pineal gland located?

Answer 2

Below the splenium of the corpus callosum

Question 3

What are hypodense structures on a CT scan?

Answer 3

Infarctions/tumours

Question 4

What are hyperdense structures on a CT scan?

Answer 4

Calcifications/haemorrhage

Question 5

What does bone vs CSF appear on CT scan?

Answer 5

Bone is bright

CSF is dark

Question 6

T1 weighted scans vs T2 weighted scans

Answer 6

T1: contrast between grey and white matter, grey matter - white, white matter = grey
T2: shows oedema, grey matter = grey, white matter = white

Question 7

Advantages of CT

Answer 7

CT quicker, cheaper, less frightening
Fresh blood shows clearly as strong white signal 
Blood is not clearly imaged in MRI
CT images bone very well
CT shows calcification well

Question 8

What is the first choice for emergency imaging of the head?

Answer 8

CT scan

Question 9

How do we locate the brain on a CT?

Answer 9

Brain is small at front, large at back
Cerebellum only visible in posterior third
Brainstem visible from middle of coronal set