Bones Of The Cranium And Orbit

Question 1

Bones meet at ___

Answer 1

Sutures

Question 2

T/F sutures are immovable junctions

Answer 2

True, except the temporomandibular joint

Question 3

What are the bones of the cranium?

Answer 3

Frontal, parietal, temporal, occipital, sphenoid, ethmoid

Question 4

Bones of the face

Answer 4

Frontal, palatine, lacrimal, nasal, inferior conchae, vomer, zygomatic, maxillary, mandible

Question 5

7 bones of the orbit

Answer 5

Frontal, palatine, lacrimal, zygomatic, maxillary, sphenoid, ethmoid

Question 6

What does the bony orbit contain?

Answer 6

Globe, connective tissue, EOM, orbital nerves, blood vessels, fat

Question 7

What are the dimensions of the orbit?

Answer 7

Width 40 mm, height 35 mm, depth 45 mm, volume 3 cc

Question 8

Bones of the roof of the orbit

Answer 8

Frontal and sphenoid

Question 9

Bones of the floor of the orbit

Answer 9

Palatine, zygomatic, maxillary

Question 10

What is the weakest wall in the orbit?

Answer 10

Floor— due to infraorbital canal and maxillary sinus

Question 11

What bones make up the medial wall?

Answer 11

Ethmoid, maxillary, lacrimal, and sphenoid

Question 12

What is the thinnest wall in the orbit?

Answer 12

Medial

Question 13

What is another name for the ethmoid bone?

Answer 13

Lamina papyracea

Question 14

What sinus is most likely to infect the orbit?

Answer 14

Ethmoid sinus

Question 15

What bones form the lateral wall?

Answer 15

Zygomatic and greater sphenoid

Question 16

What is the strongest area in the orbit?

Answer 16

Lateral orbital rim margin

Question 17

Why does the lateral wall need to be strongest?

Answer 17

Most exposed to possible injury

Question 18

How many paranasal sinuses are there?

Answer 18

Four

Question 19

What does each paranasal sinus connect to?

Answer 19

The nose

Question 20

What is the purpose of the paranasal sinuses?

Answer 20

Reduce the weight of the skull and filter the air we breathe

Question 21

What are the four paranasal sinuses?

Answer 21

Maxillary, sphenoid, ethmoid, and frontal

Question 22

Describe the maxillary sinus

Answer 22

Inferior to orbits, largest

Question 23

Describe the sphenoid sinuses

Answer 23

Posterior and medial to orbits

Question 24

Describe the ethmoid sinuses

Answer 24

Medial to the orbits

Question 25

Describe the frontal sinuses

Answer 25

Superior to orbits