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Radiography > 105- Skull Test > Flashcards

105- Skull Test Flashcards

1
Q

How many bones are in the skull

A

22

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2
Q

How many cranial and facial bones are in the skull

A

8 cranial

14 facial

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3
Q

Bones that make up the calvaria

A

Frontal, occipital, rt and lt parietal

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4
Q

Bones that make up the cranial floor

A

Ethmoid, sphenoid, rt and lt temporal

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5
Q

Where is the coronal suture found

A

Between the frontal and parietal bones

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6
Q

Where is the Sagittal suture found

A

On top of head, between the two parietal bones

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7
Q

Where is the squamosal suture found

A

Between the temporal and parietal bones

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8
Q

Where is the lambdoidal suture found

A

Between the occipital and parietal bones

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9
Q

Where is the bregma found

A

Junction of the coronal and sagittal sutures

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10
Q

Where is the lambda found

A

Junction of the lambdoidal and sagittal sutures

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11
Q

Where is the pterion found

A

Junction of parietal bone, squamosal suture,& greater Wing of sphenoid

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12
Q

Where is the asterion found

A

Junction of occipital and parietal bones, & mastoid portion of temporal bone

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13
Q

The anterior fontanel is at the

A

Bregma

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14
Q

The posterior fontanel is at the

A

Lambda

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15
Q

The sphenoidal fontanels are at the

A

Pterion

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16
Q

The mastoid fontanels are at the

A

Asterion

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17
Q

The posterior and sphenoidal fontanels close around

A

1-3 months after birth

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18
Q

The anterior and mastoid fontanels close during

A

Second year of life

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19
Q

Adult size and density of the skull are achieved by age

A

12

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20
Q

The average cranium measures __inches wide

A

6

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21
Q

The average cranium measures __inches long (front to back)

A

7

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22
Q

The average cranium measures __inches deep (top to bottom)

A

9

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23
Q

The length and width of normally shaped skulls may vary by___

A

1 inch

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24
Q

What are the names of the auditory ossicles

A

Malleus, incus, stapes

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25
Q

What kind of joints are the cranial sutures? Movement?

A

Fibrous suture, immovable

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26
Q

What kind of joint is the TMJ? Movement?

A

Synovial hinge & gliding, freely movable

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27
Q

What kind of joints are the alveolar sockets? Movement?

A

Fibrous gomphosis, immovable

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28
Q

What kind of joint is the atlantoocipital? Movement?

A

Synovial ellipsoidal, freely movable

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29
Q

The outer rim of the ear is called the

A

Helix

30
Q

The tympanic cavity communicates with the nasopharynx through the

A

Auditory (eustachian) tube

31
Q

What is the purpose of the auditory tube

A

Equalize pressures

32
Q

The maxillary sinuses are usually developed when

A

At birth

33
Q

The frontal, sphenoidal, and ethmoidal sinuses develop by age

A

6-7

34
Q

The sinuses are not completely developed until age

A

17-18

35
Q

What sinuses are the largest

A

Maxillary

36
Q

Where are the ethmoidal sinuses located

A

Within lateral masses of the labyrinths of the ethmoid bone

37
Q

Where do the anterior and middle ethmoid cells open into

A

Middle nasal meatus

38
Q

Where do the posterior ethmoid cells drain into

A

Superior nasal meatus

39
Q

The sphenoidal sinuses lie below the

A

Della turcica

40
Q

In what bone is the crista galli found

A

Ethmoid bone

41
Q

What is the degree of a mesocephalic skull

A

47

42
Q

What is the degree of a Bradycephalic skull

A

54

43
Q

What is the degree of a dolichocephalic skull

A

40

44
Q

Describe the bradycephalic skull shape

A

Short front to back
Broad side to side
Shallow vertex to base

45
Q

Describe the dolichocephalic skull shape

A

Long front to back
Narrow side to side
Deep vertex to base

46
Q

An average of ___degrees exists between OML and IOML

A

7

47
Q

An average of ___degrees exists between the OML and GML

A

8

48
Q

What is the biparietal diameter

A

Widest part of skull

49
Q

What are the two skull positioning errors

A

Rotation and tilt

50
Q

When might a patient need a reverse Townes

A

If they have a hypersthenic body habitus

51
Q

How many pairs of foramina are in the sphenoid

A

4

52
Q

What are the names of the foramina in the sphenoid

A

Rotundum, ovale, lacerum, spinosum

53
Q

The circle of Willis is formed by

A

Major arteries: anterior and middle cerebral, basilar

54
Q

What is the basilar view of the skull

A

Smv

55
Q

What focal spot size is used for skull views

A

Small

56
Q

What is the diploe

A

Inner spongy tissue layer

57
Q

Another term for acanthion

A

Anterior nasal spine

58
Q

What is it called if all of the sinuses are infected

A

Pan sinusitis

59
Q

The ethmoid sinuses are divided into ___ parts

A

3

60
Q

Underpenetration of sinuses may show___

A

Nonexistent pathology

61
Q

Townes cr

A

Enters hairline, OML perpendicular to Ir

62
Q

Townes tube angle

A

30 caudal for OML, 37 for IOML

63
Q

Structures demonstrated in Townes

A

Dorsum sellae within foramen magnum, occipital bone, Petrous ridges, posterior clinoid processes

64
Q

Caldwell cr

A

Exit nasion, nose and forehead against ir

65
Q

Caldwell tube angle

A

15 caudal

66
Q

Structures demonstrated in Caldwell view

A

Petrous ridges in lower 1/3 of orbits, frontal bone, crista galli

67
Q

Lateral skull cr

A

2” above EAM

68
Q

Structures demonstrated in lateral skull

A

Sella turcica in profile, orbital roofs superimposed

69
Q

Waters cr

A

Exit acanthion, MML perpendicular to Ir

70
Q

Lateral sinuses cr

A

1/2-1” posterior to outer canthus

71
Q

Smv cr

A

1” anterior to eam, IOML perpendicular to cr

72
Q

Structures demonstrated in pirie view

A

Sphenoid sinuses projected through open mouth

Radiography (11 decks)

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