Deck 20: Skull, Facial Bones, and Paranasal Sinuses

Question 1

All of the following are cranial bones except the:

A) maxillae.
B) frontal.
C) sphenoid.
D) occipital.

Answer 1

maxillae.

Question 2

The part of the frontal bone indicated in the figure below is the:

A) bregma.
B) lambda.
C) glabella.
D) acanthion.

Answer 2

glabella.

Question 3

All of the following are facial bones except the:

A) ethmoid.
B) maxillae.
C) mandible.
D) zygomatic bones.

Answer 3

ethmoid.

Question 4

The bone indicated in the figure below is the:

A) parietal.
B) orbital.
C) temporal.
D) zygoma.

Question 5

The bone identified in the figure below is the:

A) maxilla.
B) frontal.
C) mandible.
D) ethmoid.

Question 6

The part of the cranial base identified in the figure below is the:

A) auditory canal.
B) dorsum sellae.
C) greater wing.
D) petrous portion.

Question 7

The bone indicated in the figure below is the:

A) temporal.
B) parietal.
C) occipital.
D) sphenoid.

Question 8

Which bone in the skull contains the auditory organs and the organs of hearing?

A) Temporal
B) Sphenoid
C) Occipital
D) Ethmoid

Question 9

Which of the following is located in the middle ear?

A) Cochlea
B) Bony labyrinth
C) Tympanic membrane
D) External acoustic meatus

Question 10

The part of the cranial base identified in the figure below is the:

A) sella turcica.
B) foramen ovale.
C) hypoglossal canal.
D) foramen magnum.

Question 11

How many bones make up the cranium?

A) 4
B) 6
C) 8
D) 10

Question 12

The petromastoid portion is a part of which bone?

A) Temporal
B) Sphenoid
C) Occipital
D) Ethmoid

Question 13

The zygomatic arches are a part of which bone?

A) Frontal
B) Parietal
C) Temporal
D) Sphenoid

Question 14

Which skull suture is found between the frontal and parietal bones?

A) Sagittal
B) Coronal
C) Squamosal
D) Lambdoidal

Question 15

The vestibulocochlear organ is the organ of:
1)hearing.
2)sensation.
3)balance.

A) 1 and 2
B) 1 and 3
C) 2 and 3
D) 1, 2, and 3

Question 16

Which skull suture is located between the parietal bones?

A) Hyoid
B) Coronal
C) Sagittal
D) Squamosal

Question 17

How many bones make up the face?

A) 6
B) 10
C) 12
D) 14

Question 18

Which of the following bones contain air sinuses?
1)Ethmoid
2)Frontal
3)Sphenoid

A) 1 and 2
B) 1 and 3
C) 2 and 3
D) 1, 2, and 3

Question 19

The cranial bones are rigidly jointed together by articulations called:

A) joints.
B) bursae.
C) sutures.
D) cartilage.

Question 20

Which bone has condyles that articulate with the atlas of the cervical spine?

A) Temporal
B) Occipital
C) Parietal
D) Foramen magnum

Question 21

The landmark identified in the figure below is termed the:

A) nasion.
B) glabella.
C) acanthion.
D) inner canthus.

Question 22

The central-ray angle for the PA axial (Caldwell) projection of the skull is:

A) 5 degrees cephalad.
B) 10 degrees cephalad.
C) 12 degrees caudad.
D) 15 degrees caudad.

Question 23

The external landmark identified in the figure below is the:

A) glabella.
B) acanthion.
C) outer canthus.
D) infraorbital margin.

Question 24

Which of the following should be seen superimposed on a lateral image of the skull?
1)Orbital roofs
2)External acoustic meati
3)Temporomandibular joints

A) 1 and 2
B) 1 and 3
C) 2 and 3
D) 1, 2, and 3

Question 25

In a typically shaped head, the petrous pyramids project anteriorly and medially at what angle?

A) 37 degrees
B) 40 degrees
C) 47 degrees
D) 54 degrees

Question 26

The small bone situated at the base of the tongue is the:

A) hyoid.
B) alveolar.
C) cornu.
D) styloid.

Question 27

The part of the mandible identified in the figure below is the:

A) body.
B) ramus.
C) symphysis.
D) alveolar portion.

Question 28

The portion of the mandible identified in the figure below is the:

A) body.
B) ramus.
C) symphysis.
D) alveolar portion.

Question 29

The central ray and center of the image receptor position for a lateral projection of the skull is _____ inch(es) _____ the EAM.

A) 1; below
B) 2; below
C) 1; above
D) 2; above

Question 30

Which of the following is located in the internal ear?

A) Concha
B) Auditory tube
C) Tympanic membrane
D) Semicircular canals

Question 31

The landmark identified in the figure below is the:

A) nasion.
B) glabella.
C) acanthion.
D) auricular point.

Question 32

Which plane of the head is placed parallel to the plane of the image receptor for a lateral projection of the skull?

A) Sagittal
B) Transverse
C) Midsagittal
D) Midcoronal

Question 33

The topographic line shown in the figure below is the _____ line.

A) glabellomeatal
B) orbitomeatal
C) acanthiomeatal
D) infraorbitomeatal

Question 34

Which of the following skull types is considered average in size and shape?

A) Mesocephalic
B) Brachycephalic
C) Dolichocephalic

Question 35

Which method of examining the skull will demonstrate the petrous ridges in the orbits, the ethmoid and frontal sinuses, and the crista galli?

A) Towne
B) Caldwell
C) Schüller
D) Waters

Question 36

Which of the following is true regarding the lateral projection of the skull?
1)The midsagittal plane of the head is parallel to the image receptor.
2)The interpupillary line is perpendicular to the image receptor.
3)The mentomeatal line is parallel with the bottom edge of the image receptor.

A) 1 and 2
B) 1 and 3
C) 2 and 3
D) 1, 2, and 3

Question 37

Which skull type is narrow from side to side?

A) Mesocephalic
B) Dolichocephalic
C) Brachycephalic

Question 38

The largest and most dense bone of the face is the:

A) maxilla.
B) mandible.
C) frontal.
D) sphenoid.

Question 39

The maxillary sinus is located in which bone?

A) Temporal
B) Sphenoid
C) Maxillae
D) Ethmoid

Question 40

The topographic line identified in the figure below is the _____ line.

A) orbitomeatal
B) mentomeatal
C) acanthiomeatal
D) infraorbitomeatal

Question 41

How many bones are contained in the skull?

A) 8
B) 14
C) 22
D) 24

Question 42

What is the central-ray angulation for demonstration of the entire foramen magnum during an AP axial (Towne) projection?

A) 37 degrees caudad
B) 40 degrees caudad
C) 60 degrees caudad
D) 40 to 60 degrees caudad

Question 43

For an SMV projection of the cranial base, the central ray should always be perpendicular to the _____ line.

A) mentomeatal
B) orbitomeatal
C) infraorbitomeatal
D) acanthiomeatal

Question 44

Which method of examining the skull is identified in the figure below?

A) Haas
B) Towne
C) Shüller
D) Caldwell

Question 45

Which of the following is clearly demonstrated within the foramen magnum during an AP axial (Towne) projection of the skull?
1)Dorsum sellae
2)Sella turcica
3)Posterior clinoid processes

A) 1 and 2
B) 1 and 3
C) 2 and 3
D) 1, 2, and 3

Question 46

Which line should be placed parallel to the plane of the image receptor for the SMV projection of the cranial base?

A) Acanthiomeatal line
B) Orbitomeatal line
C) Infraorbitomeatal line
D) Mentomeatal line

Question 47

Radiographic demonstration of the cranial base is performed by which method?

A) Haas
B) Rhese
C) Towne
D) Schüller

Question 48

Which of the following is perpendicular to the image receptor plane for a Caldwell projection of the skull?

A) Glabellomeatal line
B) Acanthiomeatal line
C) Orbitomeatal line
D) Mentomeatal line

Question 49

What is the central-ray angulation for the SMV projection?

A) 0 degrees
B) 5 degrees caudad
C) 5 degrees cephalad
D) 5 to 7 degrees cephalad

Question 50

If the patient cannot flex the neck to place the orbitomeatal line perpendicular to the image receptor for an AP axial (Towne) projection, which line should be placed perpendicular?

A) Acanthiomeatal line
B) Infraorbitomeatal line
C) Glabellomeatal line
D) Mentomeatal line

Question 51

If the infraorbitomeatal line is placed perpendicular to the image receptor during an AP axial (Towne) projection of the skull, how much is the central ray angled?

A) 15 degrees caudad
B) 30 degrees caudad
C) 37 degrees caudad
D) 45 degrees caudad

Question 52

The bones of the cranium are joined together by fibrous joints called:

A) diploë.
B) sulci.
C) sutures.
D) cartilage.

Question 53

Often a patient cannot be turned into the prone position for a PA axial projection of the skull (Caldwell method). What central-ray angle would be used if the AP axial projection is used instead?

A) 10 degrees caudad
B) 15 degrees cephalad
C) 10 to 15 degrees caudad
D) 10 to 15 degrees cephalad

Question 54

What is the average central-ray angulation for the PA axial (Haas) projection of the skull?

A) 25 degrees caudad
B) 25 degrees cephalad
C) 30 degrees caudad
D) 30 degrees cephalad

Question 55

Which of the following is (are) clearly demonstrated on an SMV projection of the cranial base?
1)Mastoid process
2)Sphenoid process
3)Carotid canals

A) 1 and 2
B) 1 and 3
C) 2 and 3
D) 1, 2, and 3

Question 56

Which of the following methods will clearly demonstrate the petrous ridges, foramen magnum, dorsum sellae, and posterior clinical processes?
1)Haas (PA axial)
2)Towne (AP axial)
3)Schüller (SMV)

A) 1 and 2
B) 1 and 3
C) 2 and 3
D) 1, 2, and 3

Question 57

Which of the following is true regarding the placement of the image receptor for an AP axial (Towne) projection of the skull?
1)Its upper margin is at the level of the top of the cranium.
2)Its upper margin is 2 inches above the top of the cranium.
3)Its upper margin is 2 inches below the top of the cranium.

A) 1 only
B) 2 only
C) 3 only
D) 1, 2, and 3

Question 58

Which of the following bones is contained in the floor of the cranium?
1)Ethmoid
2)Sphenoid
3)Temporal

A) 1 and 2
B) 1 and 3
C) 2 and 3
D) 1, 2, and 3

Question 59

Which of the following lines is placed perpendicular to the image receptor plane for the AP axial (Towne) projection?

A) Orbitomeatal line
B) Infraorbitomeatal line
C) Glabellomeatal line
D) Acanthiomeatal line

Question 60

The x-ray projection demonstrated in the figure below is the:

A) SMV.
B) VSM.
C) AP axial.
D) PA axial.

Question 61

Which facial bone contains a foramen through which the tear duct passes?

A) Nasal
B) Palatine
C) Maxilla
D) Lacrimal

Question 62

The bone identified on the skull below is the:

A) temporal.
B) parietal.
C) zygoma.
D) sphenoid.

Question 63

The opening into the apex of the orbit for the transmission of the optic nerve and ophthalmic artery is called the:

A) optic canal.
B) foramen.
C) foramina ovale.
D) foramina rotundum.

Question 64

The part of the sphenoid bone identified in the figure below is the:

A) clivus.
B) foramen magnum.
C) sella turcica.
D) dorsum sellae.

Question 65

Which of the following bones are contained in the calvarium?
1)Frontal
2)Parietal
3)Temporal

A) 1 and 2
B) 1 and 3
C) 2 and 3
D) 1, 2, and 3

Question 66

What type of joint is the TMJ?

A) Synovial-hinge
B) Synovial-gliding
C) Synovial-ellipsoidal
D) Synovial-hinge and gliding

Question 67

The large aperture in the occipital bone, through which the medulla oblongata and spinal cord exit, is termed the:

A) foramen magnum.
B) basilar part.
C) occipital protuberance.
D) hypoglossal canal.

Question 68

The part of the sphenoid bone identified in the figure below is the:

A) clivus.
B) clinoid processes.
C) sella turcica.
D) dorsum sellae.

Question 69

The suture located between the occipital bone and the parietal bones is the:

A) lambdoidal.
B) squamosal.
C) sagittal.
D) corona.

Question 70

The base of the anterior portion of the occipital bone contains two large openings that allow blood vessels and nerves to pass through. These two openings are called the:

A) jugular foramina.
B) foramen magnum.
C) foramen ovale.
D) hypoglossal canal.

Question 71

Which parts of the patient's face touch the table for a PA axial projection (Caldwell method)?
1)Forehead
2)Nose
3)Chin

A) 1 and 2
B) 1 and 3
C) 2 and 3
D) 1, 2, and 3

Question 72

The posterior half of the base of the skull is formed by which bone?

A) Temporal
B) Sphenoid
C) Occipital
D) Parietal

Question 73

Which two facial bones form the roof of the mouth?
1)Maxillae
2)Vomer
3)Palatine bones

A) 1 and 2
B) 1 and 3
C) 2 and 3
D) 1, 2, and 3

Question 74

The thickest and densest portion of bone in the cranium is the _____ bone.

A) mastoid portion of the temporal
B) petrous portion of the temporal
C) basilar part of the occipital
D) glabella of the frontal

Question 75

Which of the following foramina lie in the sphenoid bone?
1)Optic foramen
2)Jugular foramen
3)Foramina rotundum

A) 1 and 2
B) 1 and 3
C) 2 and 3
D) 1, 2, and 3

Question 76

The suture identified on the figure below is the:

A) coronal.
B) squamosal.
C) sagittal.
D) lambdoidal.

Question 77

The superior aspect of the sphenoid bone contains a deep depression that contains the:

A) pituitary gland.
B) pineal gland.
C) carotid sulcus.
D) optic canal.

Question 78

The base of the temporal bone contains an opening through which the internal carotid artery passes and is termed the:

A) foramen spinosum.
B) foramen ovale.
C) foramen lacerum.
D) jugular foramen.

Question 79

The bone identified on the skull below is the:

A) temporal.
B) parietal.
C) occipital.
D) sphenoid.

Question 80

The six areas of incomplete ossification in a newborn infant's skull are called the:

A) sulci.
B) sutures.
C) diploë.
D) fontanels.