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Year 3 St Peter's Hospital Tutorials > CT Head > Flashcards

Flashcards in CT Head Deck (21)
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1

What sort of radiation is used in CT?

X rays

2

What are the 2 main divisions of the brain?

Supratentorial and infratentorial regions

3

Which structure separates the frontal and parietal lobes?

Central sulcus

4

What is the L sign?

Way of identifying central sulcus

5

What lies behind the lateral ventricles?

Thalamus

6

Name the 3 cisterns in the brain

Suprasellar
Quadrigeminal
Sylvian

7

Which of the dura has the most protective role for the brain?

Arachnoid mater

8

What shape is an extradural haematoma on CT?

Lens

9

Why does extradural haematoma cause “talk and die” syndrome?

Haematoma grows until ICP > BP and blood can’t enter brain —> suddenly drop dead

10

Which patients are most at risk of subdural haematoma?

Subdural

11

Which type of blood vessel is damaged in a subdural haematoma?

Veins

12

Where does the circle of Willis occupy?

Suprasellar cistern

13

See photos

Subarachnoid haemorrhage due to Berry aneurysm

14

What is the most common cause of intracerebral haemorrhage?

Malignant HTN

15

Which arteries perfuse the basal ganglia?

Lenticulostriate arteries

16

For how many hours will an ischaemic stroke appear normal?

3

17

How will an old infarct appear on CT?

Region of darkness as there is less blood (which is white)

18

What are the 3 main vascular territories of the brain?

Anterior, middle and posterior cerebral arteries

19

What is vomiting indicative of in cases of head trauma?

Extradural haemorrhage raising ICP

20

If a pt has a fall that causes him to have clear fluid leaking from nose, what is that fluid?

CSF

21

What causes bright white lesions on CT head?

Calcification due to SOL