Osteology of head

Question 1

What are fontanelles?

Answer 1

• depressions in a babys skull
• due to incomplete fusion of the skull bones (not abnormal)
• can be felt as soft spots

Question 2

What are the fontanelles?

Answer 2

posterior fontanelle (between occipital and parietal bones)
anterior fontanelle (between left and right frontal bone and parietal)

Question 3

Where is the coronal suture located?

Answer 3

frontal and parietal bones

Question 4

Where is the saggital suture located?

Answer 4

joins left and right parietal bone

Question 5

Where is the lambdoid suture located?

Answer 5

parietal to occipital bones

Question 6

Where is the zygomatic bone?

Answer 6

• cheek bones

- make up inferior part of eye socket

Question 7

what are the bones which make up the nose called?

Answer 7

nasal bones

Question 8

What bone makes up the upper part of mouth and surrounds nose?

Answer 8

Maxilla

Question 9

What bone makes up the jaw/

Answer 9

mandible

Question 10

Which foramen are located on the face?

Answer 10

Left and right infraorbital foramen - temporal bone either side of nose
Left and right mental foramen - mandible

Question 11

What are the two parts of the temporal bone?

Answer 11

petrous (within skull) and squamous (external)

Question 12

Where is the sphenoid bone?

Answer 12

posterior to zygomatic bone

Question 13

What suture is located between parietal and temporal bones?

Answer 13

squamous suture

Question 14

Where is the pteriom region?

Answer 14

• area where the sphenoid, frontal, parietal and temporal bones meet
• weaker part of skull often sustains trauma

Question 15

What vessel is at risk of rupture if injury to pteriom region?

Answer 15

middle meningeal

Question 16

Where is the mastoid process and what muscles attach here?

Answer 16

inferior part of temporal bone

• sternocleidomastoid
• posterior belly of digastric

Question 17

Where is the styloid process and what muscles attach here?

Answer 17

located in petrous part of temporal bone

• stylomandibular ligament
• stylohyoid ligament

Question 18

Where is the zygomatic process and temporal process located?

Answer 18

connect to each other

• zygomatic process of temporal bone (part of temporal bone)
• temporal process of zygomatic bone (part of zygomatic bone)

Question 19

Where is the external acoustic meatus?

Answer 19

between zygomatic process of temporal bone and mastoid process

Question 20

What bones form the bony orbit (eye socket)?

Answer 20

• frontal (roof)
• maxilla (floor and medial wall)
• zygomatic (floor and lateral wall)
• sphenoid (lateral wall)
• ethmoid (medial wall)
• lacrimal (medial wall)

Question 21

What are the three cranial fossa’s called?

Answer 21

anterior - frontal bone + small part of ethmoid
middle - sphenoid, parietal and temporal bone
posterior - occipital

Question 22

Where is the superior orbital fissure?

Answer 22

• sphenoid anterior part

Question 23

where is the foramen rotundum?

Answer 23

sphenoid process between superior orbital fissure and oval foramen

Question 24

where is the foramen ovale within the skull?

Answer 24

posterior aspect of sphenoid

Question 25

Where is the sella tursica?

Answer 25

• middle of the sphenoid

Question 26

What is the depression in the sella tursica called?

Answer 26

hypophyseal fossa

Question 27

What foramen does the middle meningeal artery travel through?

Answer 27

foramen spinosum

Question 28

Where is the internal acoustic meatus?

Answer 28

posterior aspect of temporal bone travels out of posterior fossa

Question 29

What bone is the clivus located in?

Answer 29

occipital (anterior aspect of base)

Question 30

Where is the foramen magnum?

Answer 30

• largest foramen in base of skull

- middle of occipital bone

Question 31

What canals are located immediate beside the foramen magnum?

Answer 31

hypoglossal canals

Question 32

What opening is located between the petrous part of temporal and occipital bone?

Answer 32

jugular foramen

Question 33

internal occipital protuberance is associated with what structure?

Answer 33

confluence of sinuses

Question 34

Where is the palatine bone/

Answer 34

posterior aspect of upper mouth just behind maxilla

Question 35

Where are the pterygoid plates?

Answer 35

posterior to palatine bone made from sphenoid and vomer bones