Anatomy of the Skull

Question 1

How many total bones are there for the skull?

Answer 1

22 bones

Question 2

How many groups is the skull then divided into?

Answer 2

2 groups

Question 3

How many bones are in the cranial bones?

Answer 3

8 bones

Question 4

what is the cranial bone?

Answer 4

top of the skull

Question 5

how many bones are in the facial bones?

Answer 5

14 bones

Question 5

where are the facial bones?

Answer 5

up on the front

Question 6

The cranial bone is further divided into:

Answer 6

• calvaria
• floor

Question 7

What is the calvaria of the cranial bones?

Answer 7

top of the skull

Question 8

What is the floor of the cranial bones?

Answer 8

base of the cranial bones

Question 9

inner layer of spongy bone separating two outer plates/ inner plates of compact tissue?
- composition of calvarium bones

Answer 9

Diploe

Question 10

What bones are classified under calvaria (top of the skull)?

Answer 10

• frontal
• occipital
  -right parietal
• left parietal

Question 11

What bones are classified under floor (base) for the skull?

Answer 11

-ethmoid
-sphenoid
-right temporal
- left temporal

Question 12

How many sections is the skull split into?

Answer 12

3 sections
- anterior cranial fossa
- middle cranial fossa
-posterior cranial fossa

Question 13

What does the anterior cranial fossa do?

Answer 13

houses the frontal lobes of cerebrum; extends from the anterior frontal bone to lesser wings of the sphenoid

Question 14

What does the middle cranial fossa do?

Answer 14

houses temporal bones, extends from lesser wings of sphenoid to apices of petrous ridges

Question 15

What does the posterior cranial fossa do?

Answer 15

deep depression posterior to petrous ridges; protects cerebellum, pons and medulla oblongata

Question 16

fibrous joints that connect the bones of the skull

Answer 16

sutures

Question 17

Where is the coronal suture?

Answer 17

between frontal and parietal bones

Question 18

Where is the sagittal suture?

Answer 18

on top of the head between two parietal bones

Question 19

Where is the squamosal suture?

Answer 19

between temporal bone and parietal bones

Question 19

Where is the lambdoidal suture?

Answer 19

between occipital and parietal bones

Question 20

junction of coronal and sagittal sutures
- used to be the anterior frontanel

Answer 20

bregma

Question 21

junction of sagittal and lambdoidal sutures
- used to be the posterior frontanel

Answer 21

lambda

Question 22

landmark in between eyebrows

Answer 22

glabella

Question 23

very top of the head

Answer 23

bregma

Question 24

areas of incomplete ossification in the infant skulls ( soft spots)?

Answer 24

fontanels

Question 25

Adult cranial size usually achieved at what age?

Answer 25

12 years old

Question 26

once was the sphenoidal fontanel

Answer 26

pterion

Question 27

once was the mastoid fontanel

Answer 27

asterion

Question 28

has vertical portion (frontal squama) and horizontal portions

Answer 28

frontal bone

Question 29

frontal squama of the frontal bone forms what?

Answer 29

forms forehead and anterior part of cranial vault

Question 30

the horizontal portion of the frontal bone forms what?

Answer 30

form orbital plates, part of roof of nasal cavity, and greater part of anterior cranial fossa

Question 31

the frontal bone articulates with what?

Answer 31

articulates with right and left paritelas, sphenoid, ethmoid, nasal bones, and zygoma

Question 32

The inner layer of spongy tissue found inside cranial bones is called :

Answer 32

Diploe

Question 33

The fontanel located at the junction of the coronal and sagittal sutures is the

Answer 33

Bregma or foramina

Question 34

The two parietal bones articulate with the frontal bone to form what suture ?

Answer 34

Coronal

Question 35

The cranial bone that provides a depression to house the pituitary gland is what bone

Answer 35

sphenoid

Question 36

The fontanel located at the junction of the lamboidal and sagittal sutures is the ?

Answer 36

Lambda

Question 37

The bone that forms the anterior portion of the cranium is what bone

Answer 37

Frontal

Question 38

The cranial bone located between the orbits and posterior to the nasal bones is what bone

Answer 38

Ethmoid

Question 39

The two parietal bones and the occipital bone joint together to form what suture

Answer 39

Lambdoidal

Question 40

The anterior clinoid process is located on what bone

Answer 40

Sphenoid

Question 41

Which bone contains the transmission of the olfactory nerves

Answer 41

Ethmoid

Question 42

bones that are at the top of the skull

Answer 42

cranial

Question 43

bones of the skull that are in the front

Answer 43

Facial bones

Question 44

what is the plane that is front to back

Answer 44

coronal

Question 45

what is the plane that is up and down

Answer 45

axial

Question 46

what is the plane that is left and right

Answer 46

sagital

Question 47

landmarks of the frontal bone :

Answer 47

Frontal eminences Supraorbital margins Supraciliary arches Supraorbital foramina Glabella

Question 48

what bone Articulates with right and left parietals, sphenoid, ethmoid, nasal bones, and zygoma

Answer 48

Frontal bone

Question 49

what fits in the ethmoidal notch ?

Answer 49

ethmoid

Question 50

what does the ethmoid consist of :

Answer 50

Consists of Horizontal plate Vertical plate Two light, spongy masses = labyrinths

Question 51

what bone is Located between the orbits and forms part of anterior cranial fossa, nasal cavity, orbital walls, and bony nasal septum

Answer 51

ethmoid

Question 52

what is the horizontal portion of the ethmoid bone called?

Answer 52

cribriform plate

Question 53

what part of the ethmoid bone is this: conical projection at anterior midline of cribriform plate

Answer 53

Crista galli

Question 54

what part of the ethmoid is : vertical portion; forms superior portion of bony nasal septum

Answer 54

Perpendicular plate =

Question 55

what part of the ethmoid bone contains numerous foramina for transmission of olfactory nerves

Answer 55

Cribriform plate

Question 56

what part of the ethmoid bone is this: Contain ethmoid sinuses or air cells Walls form part of medial walls of orbits and lateral walls of nasal cavity Have two thin, scroll-shaped projections = superior and middle nasal conchae

Answer 56

Labyrinths

Question 57

what bone Articulates with frontal, sphenoid, lacrimal, maxilla, and vomer

Answer 57

Ethmoid bone

Question 58

what part of the ethmoid bone will meet up with the vomer and make up the nasal septum

Answer 58

Perp. plate

Question 59

what part of the parietal bone is this: prominent bulge near center of external surface of each bone This is the point where the width of the skull should be measured to set technique

Answer 59

pariteal eminence

Question 59

Somewhat square Have a convex external surface and concave internal surface

Answer 59

Parietal Bones