Ch 11 Skull General

Question 1

What are the 8 cranial bones?

Answer 1

1 frontal (skullcap)
2 parietal (skullcap)
1 occipital (skullcap)
2 temporal (floor)
1 sphenoid (floor)
1 ethmoid (floor)

Question 2

What are the 14 facial bones?

Answer 2

2 maxillae (upper jaw)
2 zygomatic bones
2 lacrimal
2 nasal bones
2 inferior nasal conchae
2 palatines
1 vomer
1 mandible

Question 3

What is the slight depression above each eyebrow?

Answer 3

supraorbital groove (SOG)

Question 4

What 4 bones does the frontal bone articulate with?

Answer 4

left & right parietal
sphenoid bone
ethmoid bone

Question 5

Where is the inion located?

Answer 5

Inferior portion of the occipital bone

Question 6

What is the widest portion of the entire skull is located between the:

Answer 6

parietal tubercles

Question 7

What does the parietal bone articulate with? (5)

Answer 7

frontal bone
occipital bone
temporal bone
sphenoid bone
opposite parietal bone

Question 8

The two lateral _____ ______ are oval processes, with convex surfaces located on each side of the magnum

Answer 8

condylar portions
(occipital condyles)

Question 9

What is the large opening at the base of the skull called?
What does is do?

Answer 9

foramen magnum
where the spinal cord enters the brain

Question 10

The occipital bone articulates with? (6)

Answer 10

2 parietals
2 temporals
1 sphenoid
1 atlas

Question 11

What are the three primary portions of the temporal bone?

Answer 11

Squamous
mastoid (posterior to EAM)
petrous

Question 12

What bone is referred to as the anchor for the seven cranial bones?

Answer 12

sphenoid bone

Question 13

The articulation between the skull and the cervical spine is called the?

Answer 13

atlanto-occipital joint

Question 14

What is the densest portion of the temporal bone that shows up on x-rays?
what is the upper portion of this called?

Answer 14

petrous portion
petrous ridge

Question 15

What is the name of the posterior portion of the sella turcica?

Answer 15

dorsum sellae

Question 16

What bone protects the pituitary gland?

Answer 16

sella turcica

Question 17

What is the most vulnerable portion of the skull?

Answer 17

Squamous portion

Question 18

How many bones does the temporal bone articulate with? (3)

Answer 18

parietal
occipital
sphenoid

Question 19

What is located posterior to the sella turcica?

Answer 19

Dorsum sellae

Question 20

What projection best shows the sella turcica and dorsum sellae?

Answer 20

lateral projection

Question 21

The ethmoid bone is located _____ to the sphenoid bone

Answer 21

anterior

Question 22

How many sinuses are there?

Answer 22

frontal sinus
maxillary sinus
(body of) sphenoid sinus
ethmoid sinus

Question 23

What kind of joints are the adult cranial sutures?

Answer 23

immovable
synarthrodial
fibrous

Question 24

What is the anterior suture?
What cranial bones does it separate?

Answer 24

coronal suture
separates frontal bone & two parietals

Question 25

what is the posterior suture? What does it separate?

Answer 25

lambdoidal suture separates both parietal bones from the occipital bone

Question 26

What are the lateral sutures?

Answer 26

squamosal suture

Question 27

How many junctions within the skull?

Answer 27

6 total 1 bregma 1 lambda 2 pterion (R & L) 2 asterion (R & L)

Question 28

What is the anterior junction of the sagittal suture?

Answer 28

Bregma (junction)

Question 29

What is the posterior junction?

Answer 29

lambda junction

Question 30

What are the lateral junctions? What cranial bones do they connect?

Answer 30

pterion junction frontal, parietal, temporals, and greater wing of the sphenoid

Question 31

What are the lateral posterior junctions? What does it connect?

Answer 31

asterion junction (posterior to ear) where squamosal & lambdoidal sutures meet

Question 32

What is the equivalent anatomy (junction) for an infant to an adult skull: Anterior Fontanel: posterior Fontanel: right sphenoid fontanel: left sphenoid fontanel: right mastoid fontanel: left mastoid fontanel:

Answer 32

Bregma lambda right pterion left pterion right asterion left asterion

Question 33

Which fontanel is the largest and closes at what age?

Answer 33

anterior fontanel (bregma) 18 months of age

Question 34

Small and irregular bones that can develop in adult sutures are called?

Answer 34

sutural or Wormian bones

Question 35

Registry question: Can you see the sinuses in a water or caldwell projection?

Answer 35

no only in open mouth waters

Question 36

3 bones that make up the orbital:

Answer 36

zygmoa frontal