2: Skull Anatomy

Question 1

8 cranial bones

Answer 1

1. Parietal x2
2. Temporal x2
3. Frontal
4. Occipital
5. Sphenoid
6. Ethmoid

Question 2

14 facial bones

Answer 2

1. Zygomaticus x2
2. Lacrimal x2
3. Nasal x2
4. Palatine x2
5. Maxillae x2
6. Inferior nasal conchae x2
7. Vomer
8. Mandible

Question 3

Metopic suture

Answer 3

Suture down midline of frontal bone, present if the two frontal bones don’t completely fuse

Question 4

Frontal crest of frontal bone + what attaches to it

Answer 4

Separates two sides of neocortex; attachment for falx cerebri

Question 5

Petrous portion of temporal bone: function

Answer 5

Protects inner ear

Question 6

What bone is the foramen magnum in?

Answer 6

Occipital bone

Question 7

What movement is allowed by the occipital condyles?

Answer 7

Nodding the head yes

Question 8

Three grooves in the internal portion of the occipital bone

Answer 8

Groove for: superior sagittal sinus, transverse sinus, sigmoid sinus

Question 9

Superior vs posterior aspect of sphenoid: what they look like

Answer 9

Superior: Batman
Posterior: butterfly

Question 10

What sits in the sella turcica?

Answer 10

Pituitary gland

Question 11

What exits from the foramen rotundum?

Answer 11

Maxillary branch of Trigeminal (V2)

Question 12

What exits through foramen ovale?

Answer 12

CN V3

Question 13

What exits through the foramen spinosum

Answer 13

Middle meningeal A

Question 14

Articulations of the sphenoid bone

Answer 14

With almost every other bone in the skull

Question 15

What attaches to the crista galli of the ethmoid?

Answer 15

Falx cerebri

Question 16

What makes up the superior portion of the nasal septum?

Answer 16

Perpendicular plate of the ethmoid bone

Question 17

What forms the superior and middle nasal conchae?

Answer 17

Ethmoidal labyrinth

Question 18

Cribiform plate

Answer 18

Part of ethmoid bone where olfactory N descends along its lateral borders

Question 19

How to gain surgical access to cranial cavity

Answer 19

Bone flaps

Question 20

When creating bone flaps, how does the skull best heal?

Answer 20

When bones are wired/plated, and have incorporated overlying tissues (skin, muscle, fascia)

Question 21

Four major sutures

Answer 21

Coronal, sagittal, lambdoid, squamous

Question 22

Coronal suture

Answer 22

Frontal + parietal bones

Question 23

Sagittal suture

Answer 23

Both parietal bones

Question 24

Lambdoid suture

Answer 24

Parietal + occipital bone

Question 25

Squamous suture

Answer 25

Temporal + parietal bones

Question 26

Anterior, middle, and posterior fossae: what they hold

Answer 26

Anterior: frontal lobe Middle: temporal lobe Posterior: cerebellum

Question 27

Zygomatic arch components

Answer 27

1. Zygomatic process of temporal bone | 2. Temporal process of zygomatic bone

Question 28

Where in the orbit are the zygomatic and lacrimal bones

Answer 28

Zygomatic: lateral orbit Lacrimal: medial orbit

Question 29

Lacrimal groove

Answer 29

Passage for nasolacrimal duct

Question 30

What do the nasal bones form?

Answer 30

Bridge of nose

Question 31

What does the vertical plate of the vomer found

Answer 31

Inferior portion of nasal septum

Question 32

What do the alae of the vomer articulate with?

Answer 32

Sphenoid

Question 33

Orbital process of palatine bone

Answer 33

Forms part of medial floor of orbit

Question 34

What does the perpendicular plate of the palatine bone form

Answer 34

Lateral wall of nasal cavity

Question 35

What does the horizontal plate of the palatine bone form?

Answer 35

Posterior hard palate

Question 36

Incisive foramen of maxilla

Answer 36

Separates hard palate + anterior nasal spine

Question 37

Alveolar process of maxilla

Answer 37

Holds teeth of upper jaw

Question 38

What is the largest paranasal sinus in the skull

Answer 38

Maxillary sinus

Question 39

Three types of Maxillary fractures

Answer 39

Le Fort I: inferior maxilla (upper lip) Le Fort II: palatine, lacrimal, nasal bones, all of maxilla Le Fort III: Le fort II + zygomatic bone

Question 40

What inserts on the coronoid process of the mandible?

Answer 40

Temporalis

Question 41

TMJ parts

Answer 41

Mandible + mandibular fossa of temporal bone

Question 42

Seven bones that make up the orbit

Answer 42

1. Palatine 2. Lacrimal 3. Maxillary 4. Zygomatic 5. Ethmoid 6. Sphenoid 7. Frontal bone

Question 43

Four paranasal sinuses

Answer 43

1. Frontal 2. Sphenoid 3. Ethmoid 4. Maxillary

Question 44

Four fetal skull fontanelles

Answer 44

1. Anterior 2. Sphenoid 3. Mastoid 4. Posterior