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RAD PRO III Crainum > Mandible, TMJ's, Sinuses and Temporal bone > Flashcards

Mandible, TMJ's, Sinuses and Temporal bone Flashcards

(74 cards)

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1
Q

what does the temporal bone have

A

petrous pyramid

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2
Q

what do the petrous pyramids house

A

the organs of hearing and balance

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3
Q

thin upper portion of the temporal bone

A

squamous portion

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4
Q

how many pairs of sinuses

A

4

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5
Q

thickest densest bone in the cranium

A

petrous pyramid

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6
Q

what bone forms a large part of the middle cranial fossa and a small part of the posterior cranial fossa

A

temporal bones

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7
Q

the temporal bone consists of

A

squamous portion, tympanic portion, styloid process, zygomatic process, petromastoid portion

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8
Q

zygomatic process

A

prominent arched process that projects anteriorly to articulate with zygoma and complete the zygomatic arch

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9
Q

mandibular fossa

A

receives condyle of mandible to form TMJ

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10
Q

atricular tubercle

A

forms anterior boundary of mandibular fossa

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11
Q

tympanic portion location

A

below squama and in front of petromastoid portion

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12
Q

styloid process

A

slender, pointed bone projecting inferiorly, anteriorly, and slightly medially from inferior surface of tympanic portion

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13
Q

mastoid process

A

conical process projecting from mastoid portion

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14
Q

first of the mastoid air cells to develop

A

mastoid antrum

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15
Q

the mastoid antrum is

A

quite large and communicates with the tympanic cavity

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16
Q

the internal carotid artery courses in the ___ ___ and enters the inferior aspect of the ____ ____ and passes superior to the ____ and medially to exit the ___ ___

A

carotid canal
petrous portion
cochlea
petrous apex

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17
Q

where does the top of the ridge lay

A

TEA

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18
Q

the carotid canal opens into the

A

foramen lacerum

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19
Q

the organ of hearing

A

ear

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20
Q

the organs of hearing and equilibrium consist of three main divisions

A

external ear, middle ear and internal ear

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21
Q

two parts of the external ear

A

auricle and EAM

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22
Q

sound conducting canal

A

EAM

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23
Q

superior attachment of the auricle

A

TEA

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24
Q

how long is the EAM

A

1 inch

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25
deep central depression of the auricle
concha
26
outer third of the canal wall is _______ and the inner two thirds Is _______
cartilaginous, osseous
27
middle ear consists of
tympanic membrane, tympanic cavity and three auditory ossicles
28
three auditory ossicles
malleus, incus, and stapes
29
what functions in hearing
cochlea
30
what functions in equilibrium and balance
vestibule and semicircular canals
31
the inner ear consists of
cochlea, vestibule and three semicircular canals
32
stapes articulates with the
oval window of the inner ear
33
inner ear lies immediately below
arcuate eminence
34
the cochlea communicates with the
middle ear through the round window
35
largest and densest bone of the face
mandible
36
slowest healing facial fracture
mandible
37
the mandible consists of
curved horizontal portion called body two verticle portions called rami
38
most anterior and central part of the mandible
symphysis
39
which is more superior the coronoid process and condylar process
coronoid process
40
small opening on each side of the mandible for transmission of nerves and blood vessels
mental foramina
41
how does the TJM slant
15 degrees posteriorly and 15 degrees inferiorly and medially
42
functions of the sinuses
serve as a resonating chamber for the voice decrease the weight of the skull aid in warming and moisturizing inhaled air act as shock absorber in trauma possibly control the immune system
43
which sinuses do not develop until puberty
ethmoid air cells
44
which sinuses are usually the only ones developed enough to be demonstrated radiographically at birth
maxillary
45
at what age is the frontal and sphenoid sinus distinguishable from ethmoids
6-7 years of age
46
largest sinuses
maxillary
47
second largest sinuses
frontal
48
frontal sinuses drain into the
middle nasal meatus
49
Reids baseline
line drawn from the inferior margin of the orbit to the auricular point and extending backward to the center of the occipital bone
50
air-fluid levels for sphenoid sinuses which position would you do
cross-table lateral
51
what projection do you do when there is a suspected rami fracture
PA projection- perp central ray- CR exiting the Acanthion
52
what projection do you do when there is a suspected body of mandible fracture
PA projection- AML nearly perp- CR exiting level of the lips
53
precise technical factors for paranasal sinuses
small focal spot, IR free of artifact, kVp and mAs must be right for that patient, no movement of the head and no breathing
54
exudate
sinus fluid- thicker
55
which projections best shows sphenoid sinuses
lateral sinus
56
most important EC for lateral sinus
sella turcia in profile superimposed orbital roofs superimposed mandibular rami
57
when the lateral projection for sinuses is used for preoperative measurements what should the SID be
72
58
what projection is best for frontal sinuses and anterior ethmoidal air cells
PA Axial projection, Caldwell method
59
is angled grid or vertical grid caldwell method perferred
angled grid
60
why is the angled grid preferred over vertical
because the vertical increases the OID and can cause distortion
61
which projection shows the maxillary sinuses best
parietocacanthial projection waters method
62
waters method for sinuses will also show
foramen rotundum
63
what does the parietoacanthial waters open mouth demonstrate
sphenoid sinuses
64
SMV for sinuses are good for looking at
sphenoid and ethmoid sinuses
65
which sinuses are best seen on a Caldwell sinus projection
frontal
66
largest and densest facial bone
mandible
67
superior border of the body of the mandible consists of spongy bone called
alveolar portion
68
joints of the teeth are
gomorphus
69
upper portions of the petrous ridge lies at the level of
TEA
70
how long is the auditory tube
1 1/2 inch
71
hoe long is the EAM
1 inch
72
where do the semicircular canals lie
under the arcuate eminence
73
organ of hearing
cochlea
74
organs of equilibrium and balance
cochlear and vestibular nerves

RAD PRO III Crainum (3 decks)

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