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MRT > skull and facial bones > Flashcards

skull and facial bones Flashcards

1
Q

what are the 3 regions of the cranial floor

A

anterior cranial fossa
middle cranial fossa
posterior cranial fossa

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2
Q

what houses the frontal lobe of the cerebrum

A

anterior cranial fossa

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3
Q

what houses the temporal lobes of the cerebrum

A

middle cranial fossa

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4
Q

what houses the cerebellum, pons, medulla oblongata

A

posterior cranial fossa

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5
Q

what is the vertical part of the frontal bone called

A

frontal squama

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6
Q

where are the frontal sinuses

A

frontal squama

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7
Q

what does the frontal bone articulate with

A

parietal bones
sphenoid
ethmoid
nasal bones
zygoma

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8
Q

what is the widest portion of the skull

A

parietal eminences

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9
Q

what do the parietal bones articulate with

A

frontal
temporal
occipital
sphenoid
other parietal bone

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10
Q

what is the posteroinferior part of the skull

A

occipital bone

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11
Q

what are the four parts of the occipital bone

A

squama
occipital condyles (2)
basilar portion

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12
Q

what specific parts of the skull form the atlantooccipital joint

A

the occipital condyles

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13
Q

what vein is in the jugular foramen

A

internal jugular vein

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14
Q

what articulates with the occipital bone

A

parietal bones
temporal
sphenoid
C1

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15
Q

what are the 4 portions of the temporal bones

A

squamous portion
tympanic portion
petrous ridges
mastoid process

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16
Q

where id the zygomatic process of the temporal bone

A

squamous portion

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17
Q

what forms the zygomatic arch

A

zygomatic process of the temporal bone + temporal process of zygomatic bone

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18
Q

what forms the temporalmandibular joint (TMJ)

A

condyle of mandible and mandibular fossa

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19
Q

which way to the petrous ridges project

A

anteriorly and medially

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20
Q

what is a good landmark for top of petrous ridges

A

top of ear attachment

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21
Q

on a mesocephalic skull what is the angle between the midsagital plane and the petrous ridges

A

47

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22
Q

on a brachycephalic skull what is the angle between the midsagital plane and the petrous ridges

A

54

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23
Q

on a dolichocephalic skull what is the angle between the midsagital plane and the petrous ridges

A

40

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24
Q

what is the keystone bone of the cranial floor

A

sphenoid

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25
Q

what does the sphenoid articulate with

A

all other cranial bones

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26
Q

what are the makes up the sphenoid bone

A

body
2 lesser wings
2 greater wings
2 pterygoid processes

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27
Q

what is in the body of the sphenoid

A

2 sphenoid sinuses
sella turcica

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28
Q

what houses the pituitary gland

A

sella turcica

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29
Q

where is the sella turcica compared to EAM

A

3/4” anterior and superior to the EAM

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30
Q

what are the anterior and posterior borders of the sella turcica called

A

anterior- tuberculum sellae
posterior- dorsum sellae

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31
Q

which clinoid process is part of the sella turcica

A

posterior clinoid processes

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32
Q

what forms the posteriomedial portion of the roof of the orbits

A

lesser wings of sphenoid bones

33
Q

what do the lesser wings of the sphenoid form

A

upper margin of superior orbital fissures
anterior clinoid processes

34
Q

what do the greater wings form

A

posterolateral walls of the orbits
lower margin of superior orbital fissures

35
Q

what foramen are in the greater wings

A

ovale
rotundum
spinosum

36
Q

where is the ethmoid in relation to the sphenoid and nasal bones

A

anterior to sphenoid and posterior to nasal bones

37
Q

what does the ethmoid form

A

anterior portion of anterior cranial fossa
medial wall of orbits
superior portion of nasal septum
superior portion of sidwalls of nasal cavity

38
Q

what makes up the ethmois bone

A

cribriform plate
crista galli
perpendicular plate
lateral masses (not body)

39
Q

where are the olafactory foramina

A

cribriform plate

40
Q

what is the perpendicular plate

A

superior part of the bony nasal septum

41
Q

where are the ethmoid sinuses

A

lateral masses

42
Q

what nasal conchae do the lateral masses form

A

superior and middle

43
Q

what suture is between the frontal and parietal bones

A

coronal

44
Q

what is the suture between the parietal bones

A

sagittal

45
Q

what is the suture between the occipital and both parietal bones

A

lambdoidal

46
Q

what is the suture between the parietal and temporal bones

A

squamosal suture

47
Q

what is the anterior end of the sagittal suture called

A

bregma

48
Q

what is the posterior end of the sagittal suture called

A

lambda

49
Q

what is the pterions

A

junction of the parietal, temporal, and greater wing of sphenoid

50
Q

what is the asterions

A

posterior to the ear where the squamosal and lambdoidal sutures meet

51
Q

what is the bregma called in an infant

A

anterior fontanel

52
Q

what is the lambda in an infant called

A

posterior fontanel

53
Q

what are the facial bones

A

Nasal bones (2)
Lacrimal bones (2)
Maxillary bones (2)
Zygomatic bones (2)
Palatine bones (2)
Inferior Nasal Conchae (2)
Vomer (1)
Mandible (1)

54
Q

what do the nasal bones articulate with

A

other nasal bone
frontal bone (nasion)
maxillae
perpendicualr plate of ethmoid

55
Q

what are the smallest bones in the face

A

lacrimal bones

56
Q

where is the lacrimal bones in comparasion to nasal bones

A

posterior and lateral

57
Q

what part of the orbits do the lacrimal bones form

A

anterior part of medial wall

58
Q

where do the tear ducts pass through

A

lacrimal bones

59
Q

what do the maxillary bones articulate with

A

every other facial bone except mandible
and frontal and ethmoid bones

60
Q

what do the maxillary bones form

A

lateral walls and most of the floor of nasal cavity
part of floor of orbit
3/4 of hard palate

61
Q

what is the purpose of the hard palate

A

seperates the oral and nasal cavities

62
Q

what is in the body of the maxillae

A

maxillary sinuses
anterior nasal spine
4 processes come off of body

63
Q

what are the 4 processes of the maxillary bone

A

frontal
zygomatic
alveolar
palatine

64
Q

what does the frontal process of maxillary bone articulate with

A

frontal and nasal bones

65
Q

what does the zygomatic process of maxillary bone articulate with

A

zygoma

66
Q

what does the alveolar process of the maxillary bone articulate with

A

teeth

67
Q

what does the palatine process of the maxillary bone articulate with

A

palatine bone

68
Q

what do the zygomatic bones articulate with

A

frontal
temporal
sphenoid
maxillary

69
Q

what is the only movable skull bone

A

mandible

70
Q

what are the 3 parts of the mandible

A

ramus
body
angle/gonion

71
Q

what are the parts of the ramus of the mandible

A

mandibular condyle
coronoid process
mandibular notch (between the condyle and coronoid

72
Q

what forms the TMJ

A

mandibular condyle articulates with mandibular fossa of the zygomatic process of the temporal bone

73
Q

what are the parts of the mandibular body

A

Alveolar process
Symphysis menti
Mental protuberance
Mental foramen

74
Q

what forms the circumfrence of the orbits

A

Frontal, zygomatic, maxillary

75
Q

what forms the roof of the orbits

A
  • Mainly frontal bone (orbital plates)
  • Lesser wing of sphenoid
76
Q

what forms the floor of the orbits

A

Maxillary, zygomatic, palatine

77
Q

what forms the medial wall of the orbits

A

Ethmoid, lacrimal, maxillary

78
Q

what forms the lateral wall of the orbits

A

Frontal process of zygomatic
Greater wing of sphenoid

79
Q

what does the hyoid bone articulate with

A

nothing

MRT (4 decks)

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