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RAD PRO III Crainum > Chapter 11 Skull, nasal bones > Flashcards

Chapter 11 Skull, nasal bones Flashcards

1
Q

Skull is composed of how many bones

A

22

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2
Q

how many cranial bones

A

8

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3
Q

how many facial bones

A

14

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4
Q

cranial bones are divided into

A

floor and calvaria

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5
Q

bones of the calvaria

A

frontal
occipital
right and left parietal

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6
Q

bones of the floor

A

ethmoid
sphenoid
right temporal
left temporal

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7
Q

the inner layer of spongy tissue of the cranial vault

A

diploe

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8
Q

fibrous joints of the skull

A

sutures

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9
Q

suture found between the frontal and parietal bones

A

coronal

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10
Q

suture found between the two parietal bones

A

sagittal

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11
Q

suture found between the temporal bones and the parietal bones

A

squamosal suture

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12
Q

the suture between the occipital and parietal bones

A

lambdoidal

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13
Q

junction of the coronal and sagittal sutures

A

bregma

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14
Q

junction of the lambdoidal and sagittal sutures

A

lambda

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15
Q

junction of the parietal bone, squamosal suture and greater wing of sphenoid is the

A

pterion

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16
Q

junction of the occipital bone, parietal bone and mastoid portion of the temporal bone is the

A

asterion

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17
Q

fontanels are

A

incomplete ossifications or soft spots in the skull

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18
Q

anterior fontanel location

A

junction of the two parietal bones and the frontal bone at the bregma

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19
Q

posterior fontanel location

A

at the lambda

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20
Q

sphenoid fontanel location

A

site of pterion

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21
Q

mastoid fontanel location

A

area of asterion

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22
Q

3 parts of cranial floor

A

anterior, middle and posterior fossae

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23
Q

anterior cranial fossa extends from

A

the anterior frontal bone to lesser wing of sphenoid

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24
Q

middle cranial fossa extends to

A

lesser wings pf sphenoid to apices of petrous ridges of temporal bone

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25
Q

posterior cranial fossa is a

A

deep depression posterior to petrous ridges

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26
Q

what is the orbitomeatal line

A

EAM to outer canthus

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27
Q

two spongy lateral masses of the ethmoid bone

A

labyrinths

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28
Q

average cranium size

A

6 in side to side, 7 in front to back, 9 in from high to low

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29
Q

the vertical portion of the frontal bone

A

frontal squama

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30
Q

horizontal portions of the frontal bone form the

A

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

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31
Q

found on the superior portion of the squama is a rounded elevation called the

A

frontal eminence

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32
Q

two arched ridges that correspond in position to the eyebrows

A

superciliary arches

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33
Q

opening in the center or the supraorbital margin for nerves and blood vessels is the

A

supraorbital foramen

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34
Q

smooth elevation between the superciliary arches is the

A

glabella

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35
Q

the squama articulates with the parietal bone at

A

coronal suture

36
Q

the squama articulates with the greater wing of sphenoid bone at

A

the frontosphenoidal suture

37
Q

the squama articulates with the nasal bones at the

A

frontonasal suture

38
Q

frontalnasal suture is termed the

A

nasion

39
Q

what are the orbital plates of the horizontal portion of the frontal bone separated by

A

ethmoidal notch

40
Q

the ethmoidal notch receives the

A

cribriform plate

41
Q

the horizontal portion of the ethmoid bone is called the

A

cribriform plate

42
Q

thick conical process of the ethmoid bone

A

crista galli

43
Q

Vertical portion of the ethmoid bone

A

perpendicular plate

44
Q

labyrinths contain

A

ethmoidal sinuses or air cells

45
Q

each medial wall of the labyrinths are two thin, scroll-shaped processes called the

A

superior and middle nasal conchae

46
Q

what bones does the ethmoid articulate with

A

frontal and sphenoid

47
Q

where do you measure the width of the head for radiography

A

parietal eminence

48
Q

external surface of the parietal bone is

A

convex

49
Q

internal surface of the parietal bone is

A

concave

50
Q

what bones does the parietal bone articulate with

A

frontal, temporal, occipital, sphenoid, and opposite bones of the cranium

51
Q

which bone articulates with all other 7 cranial bones

A

the sphenoid bone

52
Q

bone that looks like bat ( has wings)

A

sphenoid bone

53
Q

the sphenoid bone consists of

A

a body, greater and lesser wings, two pterygoid processes

54
Q

the deep depression on the superior surface

A

sella turcica

55
Q

what does the Sella turcica contain

A

the pituitary gland

56
Q

the sella trucicia is bounded anteriorly by ____ ___ and posteriorly by the ____ _____

A

tuberculum sellae and dorsum sellae

57
Q

the ___ supports the pons

A

clivus

58
Q

the ___ ___ extends across the anterior portion of the tuberculum sellae

A

optic groove

59
Q

opening into the apex of orbit for the transmission of the optic nerve and ophthalmic artery

A

optic canal also called the optic foramen

60
Q

which projection is done for superior orbital issues

A

PA axial Caldwell

61
Q

lesser wing of sphenoid forms the upper margin of the

A

superior orbital fissures

62
Q

the foramina ___ , ___ and ____ are paired and are situated under the ____ ____

A

rotundum, ovale, and spinosum
greater wings

63
Q

___ ____ arise from the lateral portions of the inferior surface of the body of the sphenoid bone

A

pterygoid processes

64
Q

each pterygoid process consists of

A

two plates of bone, the medial and lateral pterygoid lamina

65
Q

the medial lamina of the pterygoid process has a hook-shapped process called

A

pterygoid hamulus

66
Q

occipital bone has 4 parts what are they

A

squama, two occipital condyles and basilar portion

67
Q

another name for external occipital protuberance

A

inion

68
Q

occipitoatlantal joints

A

articulation between the occipital bone and atlas ( C1)

69
Q

why is the jugular foramen important

A

allow blood to drain from the brain via the internal jugular vein and lets cranial nerves pass through it

70
Q

sloping surface of the junction of the dorsum sellae of the sphenoid bone and the basilar portion of the occipital bone is called the

A

clivus

71
Q

thickest, densest bone in the crainum

A

petrous pyramid

72
Q

what contains the organs of hearing and balance

A

petrous portion of temporal bone

73
Q

IPL

A

interpupillary line

74
Q

OML

A

orbitomeatal line

75
Q

IOML

A

infraornotomeatal line

76
Q

Adult size and density of the cranium is usually achieved by age

A

12

77
Q

Midpoint of the frontonasal suture

A

Nasion

78
Q

What do labyrinths contain

A

Ethmoidal sinuses and air cells

79
Q

What do the parietal bones form

A

Posterior portion of the cranial roof by their articulationwith each other at the msp suture

80
Q

Prominent bulge on each parietal bone

A

Parietal eminence

81
Q

Top border of dorsum sellae

A

Posterior clinoid processes

82
Q

What do the foramen on the greater wings do

A

Transmit nerves and blood vessels

83
Q

What are the three foramen good for in radiographic investigation

A

Detection of erosive lesions of neurogenic or vascular origin

84
Q

What is the foramen magnum

A

Large opening at the base of the squid which the medulla oblongata passes as it exits cranium

85
Q

What is the external occipital protuberance

A

Prominent process on squama

RAD PRO III Crainum (3 decks)

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