L75: H&N 1

Question 1

How many cranial bones are there?

Answer 1

8

Question 2

Name the cranial bones:

Answer 2

• Ethmoid;
• Frontal;
• Occipital;
• Parietal (2);
• Sphenoid;
• Temporal (2)

> EFPOST

Question 3

Where does the olfactory nerve (CN1) enter the skull?

Answer 3

Through the cribriform plate of the ethmoid bone

Question 4

What is the foramen magnum and what is it’s significance?

Answer 4

The hole in the centre of the cranial base, where the spinal cord passes to/ from the brain.

Question 5

How many facial bones are there?

Answer 5

14

Question 6

Name the facial bones:

Answer 6

• Lacrimal (2);
• Maxilla (2);
• Nasal (2);
• Inferior concha (2);
• Palatine (2);
• Vomer (1);
• Zygoma (malar) (2);
• Mandible (1).

Question 7

What is a cranial suture?

Answer 7

A type of fibrous joint that is unique to the skull

Question 8

At what age do cranial sutures fuse completely and become immovable?

Answer 8

~20 y/o

Question 9

Why are cranial sutures of clinical significance?

Answer 9

They are points of weakness

Question 10

What are the three cranial sutures?

Answer 10

• Coronal;
• Saggital;
• Lamboid.

Question 11

What is the blood supply to the face and neck?

Answer 11

Aorta- common carotid artery- external carotid artery

Question 12

What is the blood supply to the brain?

Answer 12

Aorta- common carotid artery- internal carotid artery

Question 13

What is the venous drainage of the face and neck?

Answer 13

External jugular vein

Question 14

What is the venous drainage of the brain?

Answer 14

Internal jugular vein