Lecture 4: Skull

Question 1

What are the paired cranial bones?

Answer 1

Temporal

Parietal

Question 2

What are the unpaired cranial bones?

Answer 2

Frontal

Occipital

Sphenoid

Ethmoid

Question 3

What are the paired facial bones?

Answer 3

Zygomatic

Lacrimal

Nasal

Palatine

Maxillae

Inferior Nasal Conchae

Question 4

What are the unpaired facial bones?

Answer 4

Vomer

Mandible

Question 5

What is the clinical significance of the Pterion landmark on the skull?

Answer 5

Middle Meningeal A. lies just deep to it, can rupture if there is a blow to the side of the head

Question 6

What is a metopic suture?

Answer 6

Incomplete fusion of the frontal bones in the saggital plane

-can cause clept lip or palate

Question 7

Why would bone flaps be created during surgery?

Answer 7

Incorporating as much overlying tissue with the bone allows periosteium to heal the best

Can be skin, muscle, fascia, etc.

Question 8

What 2 bones meet at the coronal suture?

Answer 8

Frontal bone and Parietal bone

Question 9

What 2 bones meet at the saggital suture?

Answer 9

Both parietal bone

Question 10

What 2 bones meet at the Lambdoid suture?

Answer 10

Occipital bone and Parietal bone

Question 11

What 2 bones meet at the Squamosal suture?

Answer 11

Temporal bone and parietal bone

Question 12

What articulates with each other when nodding your head yes?

Answer 12

Atlas and the Occipital Condyles

Question 13

What structure is found in the sella turcica?

Answer 13

Pituitary Gland

Clinical Significance: Tumor of pituitary gland can damage optic nerve and cause blindness

Question 14

What cranial bone contains the foramen rotundum, foramen ovale, and foramen spinosum?

Answer 14

Sphenoid Bone

Question 15

What blood vessel is transmitted through the foramen spinosum?

Answer 15

Middle Meningeal A.

Question 16

What cranial bone does the pterygoid canal run through?

Answer 16

Sphenoid B.

Question 17

What is the attachment for the Falx Cerebri in the Ethmoid bone?

Answer 17

Crista Galli

Question 18

What bone is the cribiform plate located in?

Answer 18

Ethmoid Bone

Question 19

What bone forms the superior portion of the Nasal Septum?

Answer 19

Perpendicular plate of Ethmoid bone

Question 20

What bone forms the inferior portion of the Nasal Septum?

Answer 20

Vomer Bone

Question 21

What part of the Vomer B. articulates with the Sphenoid B.?

Answer 21

Ala

Question 22

What bone is part of the orbit, nasal cavity, and hard palate?

Answer 22

Palatine Bone

Question 23

Cleft lip is a failure of what bones to fuse?

Answer 23

Palatine and Maxilla

Question 24

What structure in the maxilla separates the hard palate from the anterior nasal spine?

Answer 24

Incisive foramen

Question 25

What is the largest paranasal sinus in the skull?

Answer 25

Maxillary Sinus

Question 26

What does a Le Fort I fracture involve?

Answer 26

Fracture of the alveolar process of maxilla

Question 27

What does a Le Fort II fracture involve?

Answer 27

Fracture of maxilla partially through the orbit and at the zygomaxillary suture

Question 28

What does a Le Fort III fracture involve?

Answer 28

Fracture dislocating upper face from the cranium (through the orbit)

Question 29

What bones comprise the nasal complex?

Answer 29

Frontal B. Sphenoid B. Ethmoid B. (Superior and middle nasal conchae) Horizontal plate of palatine B. Maxilla Inferior nasal concha B. Lacrimal B. Nasal B.

Question 30

What bones form the roof of the orbit?

Answer 30

Lesser wing of sphenoid B. Frontal B.

Question 31

What bones form the lateral wall of the orbit?

Answer 31

Frontal B. (zygomatic process) Sphenoid B. (Greater wing) Zygomatic B. (Orbital surface)

Question 32

What bones form the medial wall of the orbit?

Answer 32

Maxilla (frontal process) Lacrimal B. Ethmoid B. (Lateral mass)

Question 33

What bones form the floor of the orbit?

Answer 33

Palatine B. (Perpendicular plate) Maxilla (orbital surface) Zygomatic B.

Question 34

What bones form the orbit?

Answer 34

Frontal B. Sphenoid B. Zygomatic B. Maxilla Palatine B. Lacrimal B. Ethmoid B.

Question 35

What are the paranasal sinuses?

Answer 35

Frontal Sphenoid Ethmoid Maxillary

Question 36

What is the clinical significance of the Anterior Fontanelle of the fetal skull?

Answer 36

Largest fontanelle, can extract CSF