Anatomy - Skull

Question 1

What are the 5 layers of the scalp?

Answer 1

SCALP

Skin 
Connective tissue
Aponeurosis 
Loose connective tissue
Pericranium

Question 2

In what layer of the scalp are the arteries of the scalp found?

Answer 2

Connective tissue - 2nd layer

Question 3

What is the pterion?

What artery runs deep to it?

Answer 3

Thinnest part of the skull

H-shaped suture between

• frontal
• parietal
• temporal
• sphenoid

Middle meningeal artery

Question 4

What nerve innervates MOST of the dura matter?

Answer 4

CN V - trigeminal

Irritation results in headache

Question 5

What is the name of the dura mater that separates the two cerebral hemispheres?

Answer 5

Falx cerebri

Question 6

What is the first branch of the subclavian artery that provides blood to the brain?

Answer 6

Vertebral artery

Question 7

What are the two arteries that supply the brain?

Answer 7

Vertebral artery
Internal carotid artery

(external carotid artery supplies neck, face and scalp)

Question 8

What artery is made up from right and left vertebral artery together?

Answer 8

Basilar artery

Question 9

What artery supplies the visual cortex?

Answer 9

Posterior cerebral artery

Question 10

What layer is the circle of Willis found in?

Answer 10

Subarachnoid space - so its bathed with CSF

Question 11

What is the function of the arachnoid granulations?

Answer 11

To reabsorb CSF

Question 12

What is the definition of hydrocephalus?

Answer 12

Increase in CSF volume

(due to either;

• increase in production
• inadequate reabsorption
• obstruction to flow)

Question 13

How is hydrocephalus managed?

Answer 13

Ventricular peritoneal shunt

Shunt catheter from ventricles into the peritoneal cavity

Question 14

What are the 3 categories of bleeding in the cranial cavity?

Answer 14

Extradural

Subdural

Subarachnoid