Bones of the skull

Question 1

What are the two divisions the bones of the skull can be divided into?

Answer 1

Neurocranium and Viscerocranium

Question 2

How many bones are there in the neurocranium?

Answer 2

8 bones

Question 3

What are the bones of the neurocranium?

Answer 3

sphenoid, occipital, ethmoid, temporal (x2), frontal, parietal (x2)

Question 4

How many bones are there in the viscerocranium?

Answer 4

14 bones

Question 5

What are the bones of the viscerocranium?

Answer 5

vomer, zygomatic (x2), palatine (x2), inferior nasal concha (x2), mandible, lacrimal (x2), nasal (x2)

Question 6

What is the name of the joints that bones of the skull articulate at?

Answer 6

sutures (except for temporomandibular joint)

Question 7

What are the interactions between sutures called?

Answer 7

fontanelles

Question 8

What are the names of the fontanelles that can be seen on the foetal skull and approximately what age do they close?

Answer 8

Anterior (2-2.5 years)
Anterolateral (3 months)
posterolateral (1 year)
posterior (3 months)

Question 9

What are the names given to the fontanelles when they close?

Answer 9

anterior- bregma
anterolateral- pterion
posterior- lambda
posterolateral- asterion

Question 10

What is the metopic suture?

Answer 10

separates the 2 halves of the frontal bone until they fuse at the age of 7