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MRT > Anatomy - cranial bones > Flashcards

Anatomy - cranial bones Flashcards

(84 cards)

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1
Q

Biggest foramen in the skull is?

A

Foramen Magnum

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2
Q

What 2 things pass through optic foramen?

A

Optic Nerves and ophthalmic artery

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3
Q

Ethmoid bone forms most of the surface of:

A

Nasal Cavity

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4
Q

List cranial bones

A

ethmoid, frontal, partial, occipital, temporal, sphenoid

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5
Q

Which cranial bone articulates with all other cranial bones?

A

Sphenoid

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6
Q

Which foramen is located in the cribriform plate of the ethmoid?

A

Olfactory Foramen

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7
Q

What passes through the olfactory foramen?

A

Olfactory nerves for smell

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8
Q

What does the ethmoid bone consist of?

A

Cribriform plate, crista galli, perpendicular plate, and lateral masses

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9
Q

Which foramen is located in the lesser wing of the sphenoid?

A

Optic foramen

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10
Q

What travels through the carotid canal?

A

Internal carotid artery

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11
Q

Where is the foramen magnum located?

A

Occipital bone

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12
Q

What is within the foramen magnum?

A

Brain stem and spinal cord

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13
Q

What sinuses are located in the frontal bone?

A

2 frontal sinuses

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14
Q

Function of cranial bones

A

form cranial cavity and protect brain

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15
Q

Cranial floor regions - 3 cranial fossa

A

Anterior, middle, posterior cranial fossa

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16
Q

Calvaria (skull cap) consist of

A

frontal, occipital, parietal, 2 plates of compact bone, inner layer of spongy/trabecular bone (diploe)

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17
Q

Floor consist of

A

Ethmoid, sphenoid, occipital, frontal, temporal

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18
Q

What type of bone is the skull

A

flat

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19
Q

What type of joint are the sutures - adults

A

fibrous, synarthrosis

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20
Q

Name the sutures

A

coronal, sagital, lambdoidal, squamosal

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21
Q

What type of joint are the sutures - younger

A

Ampiarthrosis (slight move)

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22
Q

list Suture landmarks

A

Bregma, Lambda, Pterions, Asterions

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23
Q

Coronal suture location

A

between frontal and parietal bones

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24
Q

sagital suture location

A

superior midline between parietal bones

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25
lambdoidal suture location
posteriorly between occipital bone and parietal bones
26
squamosal suture
lateral part of skull between parietal and temporal bone
27
bregma landmark location
anterior end of sagital suture
28
lambda landmark location
posterior end of sagital suture
29
pterions landmark location (right and left one)
junction: parietal, temporal, greater sphenoid wing
30
asterions landmark location
Posterior to the ear where the squamosal and lambdoidal sutures meet
31
pterions landmark for?
middle meningeal artery
32
Weakest part of skull
Middle meningeal artery
33
angle of petrous ridges to midsag plane in a mesocephalic skull
47 degrees
34
angle of petrous ridges to midsag plane in a brachycephalic skull
54 degrees
35
angle of petrous ridges to midsag plane in a dolichocephalic skull
40 degrees
36
Sphenoid consist of what?
Body (1), lesser wings (2), greater wings (2), and pterygoid process (2)
37
Body of sphenoid contains
2 sphenoid sinuses and sella turcia
38
What is located in the sella turcia
pituitary gland
39
Landmark for sphenoid (sella turcia) - lateral projection
3/4" anterior and 3/4" superior to EAM
40
In adult, what is at the junction of coronal suture and sagital suture?
bregma
41
In infant, what is at the junction of coronal suture and sagital suture?
anterior fontanel (soft spot)
42
Frontal bone contains what horizontally?
Orbital plates
43
Frontal bone contains what vertically (squama)?
frontal sinuses (2)
44
What does the frontal bone form
forehead
45
Occipital bone is located where?
posteroinferior part of skull
46
What does the occipital bone form
floor of posterior cranial fossa
47
3 parts of the occipital bone
squama, occipital condyles (2), basilar portion
48
What is C1
Atlanto occipital axial joint
49
What passes through jugular foramen
Internal jugular vein
50
Parietal bone articulations
frontal, occipital, opposite parietal bone, temporal, sphenoid
51
Widest portion of skull
Parietal eminences of the parietal bone
52
Frontal bone articulations
sphenoid, parietal, ethmoid, nasal bones, zygoma, maxillae facial bone
53
Foramen in the frontal bone
Supraorbital foramen
54
Which bone is the glabella located in
frontal bone, between the superciliary arches
55
Frontal bone landmarks
Frontal eminences, supraorbital margins, superciliary arches, supraorbital foramina, glabella
56
Eyebrow area
superciliary arches
57
What passes through the supraorbital formina
supraorbital nerve and vein
58
Temporal bone consist of
squamous portion, tympanic portion, petrous ridges, mastoid process
59
What bone is the EAM located in?
temporal bone
60
What's the landmark for the top of the petrous ridges in a lateral projection
TEA (top of ear attachment)
61
Thickest bone in the skull
Petrous ridges
62
Petrous ridges project?
anteriorly and medially
63
What does the mastoid portion of the temporal bone contain?
air cells that communicate with inner ear
64
2 parts of the tympanic portion of the temporal bone?
EAM and styloid process
65
Protuberance of occipital bone forms what
external occipital protuberance (inion)
66
Landmark for the middle meningeal artery
Pterions
67
Location of crista gali
ethmoid bone
68
Function of crista gali
membranes that surround the brain attach here (provides attachment for falx cerebri)
69
What does the perpendicular plate of ethmoid bone form
superior portion of the bony nasal septum
70
What do the lateral masses of the ethmoid bone form
superior and middle nasal conchae
71
Ethmoid bone forms most of
the nasal cavity
72
Which bone has the hypoglosal nerve
occipital
73
Squamous portion of the temporal bone is the
Zygomatic process of the temporal bone
74
What structures do the petrous ridges of the temporal bone house
cochlea and semi-circular canals
75
What skeletal division does the cranial belong to
Axial
76
Location of sella turcia
body of sphenoid
77
What is located in the anterior cranial fossa
frontal lobe of cerebrum
78
What is located in the middle cranial fossa
temporal lobes of cerebrum
79
What is located in the posterior cranial fossa
cerebellum, pons, medulla oblongata
80
What is the function of the cochlea and semicircular canals of the petrous ridges in the temporal bone
hearing and balance
81
2 foramen in temporal bone
jugular foramen and lacerum foramen
82
What does it mean if orbit plates are not superimposed on radiograph?
tilt
83
What does it mean if orbit plates are superimposed on radiograph?
no tilt
84
Location of hyoid
Between mandible and larynx

MRT (12 decks)

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