Skull Anatomy

Question 1

The skull has how many bones?

Answer 1

22; 8 cranial and 14 facial

Question 2

What cranial bones are paired?

Answer 2

Parietal and temporal

Question 3

The sphenoid and ethmoid are classified as ____ bones

Answer 3

Cranial (floor)

Question 4

What is the name of the articulation between the frontal and parietal bone?

Answer 4

The coronal suture

Question 5

What is the name of the articulation between the parietal bone and the temporal bone?

Answer 5

Squamosal suture

Question 6

The foramen magnum is located in which bone?

Answer 6

Occipital

Question 7

The flattened, horizontal portion on the superior aspect of the ethmoid bone is called the:

Answer 7

Cribriform plate

Question 8

The hard, dense bony process of the temporal bone that houses the structures of the middle and inner ear is called the:

Answer 8

Petrous pyramid

Question 9

The mastoid air cells are located in the:

Answer 9

temporal bone

Question 10

The rounded, articulating condyles of the mandible that help form the temporomandibular joint are called the:

Answer 10

condyloid processes

Question 11

The superior and middle nasal conchae that serve to increase the surface area of the nasal cavities are found in the:

Answer 11

Ethmoid bone

Question 12

Which three cranial bones articulate directly with the zygomatic bone?

Answer 12

Frontal, sphenoid, temporal

Question 13

The only movable bone in the adult skull is the:

Answer 13

Mandible

Question 14

Average skull, width is 75-80% of length. Angle from midsagittal plane to petrous pyramid is 47 degrees

Answer 14

Mesocephalic

Question 15

Broad skull side to side; 80% or greater than the length

Answer 15

Brachycephalic

Question 16

Long, narrow skull; less than 75% of the length

Answer 16

dolichocephalic

Question 17

There are a total of _____ fontanels in an infant.

Answer 17

6

Question 18

Which cranial bone contains the cribriform plate?

Answer 18

ethmoid

Question 19

What is the difference, in degrees, between the infraorbitomeatal and orbitomeatal line?

Answer 19

7-8 degrees

Question 20

A patient enters the emergency department with a possible basilar skull fracture. Which of the following skull projections would best demonstrate any blood present in the sphenoid sinus?

Answer 20

horizontal beam lateral

Question 21

Which cranial bone possesses the zygomatic process?

Answer 21

temporal

Question 22

What are the two most common positioning errors when it comes to headwork.

Answer 22

rotation and tilt

Question 23

Bones of the calvarium (skullcap)

Answer 23

Frontal, right/left parietal, occipital

Question 24

Bones of the skull floor

Answer 24

right/left temporal, sphenoid, ethmoid

Question 25

Two main parts of the frontal bone

Answer 25

squamous/vertical portion (forehead); orbital/horizontal portion (superior part of orbit)

Question 26

Slight depression above each eyebrow; corresponds to the floor of the anterior fossa of the cranial vault

Answer 26

Supraoribital groove (SOG)

Question 27

Superior rim of each orbit

Answer 27

Supraorbital margin

Question 28

Small hole/opening within the SOM slightly medial to it's midpoint

Answer 28

Supraoribital notch

Question 29

Four cranial bones that articulate with the frontal bone:

Answer 29

right/left parietals, sphenoid, ethmoid

Question 30

The widest portion of the skull is located between the ________ of the two parietal bones

Answer 30

parietal tubercles (eminences)

Question 31

five cranial bones that articulate with the parietal bones:

Answer 31

frontal, occipital, sphenoid, temporal, opposite parietal

Question 32

Rounded external surface of the occipital bone:

Answer 32

Squamous portion

Question 33

the prominent bump or protuberance at the inferoposterior portion of the skull:

Answer 33

external occipital protuberance (inion)

Question 34

6 bones that articulate with the occipital bone:

Answer 34

two parietals, two temporals, sphenoid, atlas (first cervical vertebra)

Question 35

Arch of bone extending anteriorly from the squamous portion of the temporal bone

Answer 35

zygomatic process

Question 36

Houses the organs of hearing and equilibrium, including mastoid air cells

Answer 36

petrous pyramid

Question 37

Cranial articulations of each temporal bone:

Answer 37

Parietal, occipital, sphenoid

Question 38

Central depression on the body of the sphenoid bone

Answer 38

sella turcica

Question 39

The sella turcica houses which gland?

Answer 39

Pituitary gland

Question 40

contains many small openings or foramina through which segmental branches of the olfactory nerves (or the nerves of smell) pass.

Answer 40

Cribriform plate

Question 41

Cranial articulations of the ethmoid bone

Answer 41

Frontal and sphenoid

Question 42

Classification of cranial sutures

Answer 42

fibrous/synarthrodial

Question 43

Separates the two parietal bones at the midline

Answer 43

Sagittal suture

Question 44

Separates the two parietal bones from the occipital bone

Answer 44

Lambdoidal suture

Question 45

What landmark corresponds with the level of the petrous ridge?

Answer 45

TEA

Question 46

What is the largest immovable bone of the face?

Answer 46

Maxilla

Question 47

A skull with a 47 degree angle between the petrous pyramids and the midsagittal plane is classified as:

Answer 47

Mesocephalic

Question 48

positioning line that extends across the front (anterior face) through both eyes

Answer 48

IPL

Question 49

Positioning line extending from the EAM to the smooth elevation between the superciliary arches

Answer 49

GML

Question 50

Comprises most of the lateral wall of the orbital cavities.

Answer 50

Zygomatic bone

Question 51

Forms the posterior 1/4 of the roof of the mouth

Answer 51

Palatine bone

Question 52

Vertical portion of the mandible

Answer 52

Ramus

Question 53

Horseshoe portion of the mandible

Answer 53

Body