Anatomy of the skull

Question 1

What is the difference between neurocranium and viscerocranium?

Answer 1

Neurocranium- cranium vault. Protects brain and attachment for muscles
Viscerocranium- facial skeleton.

Question 2

Which two bones make up the base of the cranial vault>

Answer 2

Ethmoid and sphenoid

Question 3

What travels through the cribiform plate of the ethmoid bone?

Answer 3

Olfactory nerve

Question 4

Where does the coronal suture run?

Answer 4

Between frontal and parietal bones

Question 5

Where does the sagittal suture run?

Answer 5

Between the two parietal bones

Question 6

Where does the lambdoid suture run?

Answer 6

Between parietal and occipital bones

Question 7

Where is the pterion?

Answer 7

4 bones meet

Question 8

What are the two main parts of the temporal bone and where are they located?

Answer 8

Squamous part: makes up outside skull

Petrous part: makes ledge on inside skull

Question 9

Name the three processes of the temporal bone

Answer 9

Zygomatic process
Mastoid process
Styloid processe

Question 10

What does the zygomatic process contribute to?

Answer 10

Zygomatic arch

Question 11

What attaches to the mastoid process?

Answer 11

Sternocleidomastoid

Question 12

What canals are on temporal bone?

Answer 12

External and internal auditory meatus

Question 13

What do the greater and lesser wings of the sphenoid bone make up?

Answer 13

GREATER: makes up the external skull
LESSER: makes up ledge in skull

Question 14

What projects down from the sphenoid bone and what attaches to them

Answer 14

The pterygoid plates. Pterygoid muscles attach here

Question 15

What canals/ foramen are found on sphenoid bone?

Answer 15

Optic foramen
Superior orbital fissure
Foramen rotundum

Question 16

What can be found on inside of sphenoid and what is the function of these structure(s)?

Answer 16

Anterior clinoid processes and inferior clinoid processes

Attachment points of dura mater

Question 17

What are the two layers of the dura mater?

Answer 17

Periosteal layer and meningeal layer

Question 18

What is the difference between the periosteal and meningeal layer of the dura mater?

Answer 18

The periosteal layer sticks to the skull all the way but the meningeal layer pulls away

Question 19

What is the purpose of the projections of the meningeal layer?

Answer 19

Helps divide up the brain

Question 20

What does falx cerebri separate?

Answer 20

Left and right

Question 21

What does the tentorium cerebeli separate?

Answer 21

Temporal and cerebral

Question 22

What fills the dural venous sinus?

Answer 22

Venous blood

Question 23

Name the facial bones

Answer 23

Lacrimal, nasal, inferior conchae, vomer, maxilla, mandible, zygomatic, palatine

Question 24

Which bones contribute towards the orbit?

Answer 24

Frontal, maxilla, lacrimal, ethmoid, sphenoid, zygomatics

Question 25

What does the orbit house?

Answer 25

Eyeball, extraocular muscles and associated vascularisation

Question 26

What makes up the bony skeleton of the oral cavity

Answer 26

maxilla, mandible, palatine

Question 27

Which parts of the nasal cavity are cartilaginous?

Answer 27

Anterior part

Question 28

What bones make up the exterior of nasal cavity?

Answer 28

Septal cartilage, ethmoid, vomer

Question 29

What bones make up the interior of the nasal cavity?

Answer 29

Suprerior, middle and inferior conchae

Question 30

What is the function of superior, middle and inferior conchae

Answer 30

Moisten and warm the air before it enters resp. system

Question 31

Describe structure of paranasal sinuses

Answer 31

Hollow spaces within frontal, sphenoid, ethmoid and maxillary bones. These bones are linked by membrane mucous

Question 32

What is the function of the fontanelle’s in foetal skull

Answer 32

growth of brain and flexibility of skull during birth

Question 33

What is the location of the anterior cranial fossa?

Answer 33

Front of lesser wing of sphenoid bone

Question 34

What is the location of the middle cranial fossa?

Answer 34

Lesser wing to petrous temporal

Question 35

Where does the middle meningeal artery run?

Answer 35

Through external skull and dura mater, just beneath the pterion

Question 36

Where does internal jugular vein enter skull?

Answer 36

Through jugular foramen

Question 37

Describe the course of the interal carotid artery?

Answer 37

Carotid canal
Carotid canal enters foramen and runs through petrous temporal
Reaches foramen laterum
Reaches hairpin bend in cavernous sinus