Headwork Notes Flashcards
1
Q
Number of bones in the skull-
A
22
2
Q
how many are cranial bones-
A
8
3
Q
how many bones are calvaria-
A
4
4
Q
how many are floor bones-
A
4
5
Q
facial bones-
A
14
6
Q
function of cranial bones-
A
provide protective housing for brain
7
Q
function of facial bones-
A
provide structure, shape, & support for face
8
Q
functions of facial & cranial bones together-
A
-protective housing for upper respiratory system & digestive tract
-also forms orbital sockets & protection for eyes
9
Q
dipole & where it’s located-
A
outer cranium formed by 2 plates of compact tissue separated by inner layers of spongy tissue
10
Q
with exception of mandible, joints of skull are called-
A
bones of cranium & face
11
Q
joints of the skull formed by-
A
fibrous joints called sutures
12
Q
coronal (1) suture location-
A
b/w frontal & parietal bones
13
Q
sagittal (1) suture location-
A
b/w 2 parietal bones on top of head
14
Q
squamosal (2) suture location-
A
b/w temporal & parietal bones
15
Q
lambdoidal (1) suture location-
A
b/w occipital & parietal bones
16
Q
frontal bone forms-
A
roof of orbit & part of roof of nasal cavity
17
Q
frontal eminence-
A
rounded elevations on each side of MSP on superior portion of frontal squama
18
Q
superciliary-
A
ridges that correspond w: position of eyebrows
19
Q
glabella-
A
smooth elevations b/w superciliary arches
20
Q
frontal sinuses located-
A
situated b/w 2 plates of diplo in center of frontal squama & on each side of MSP
21
Q
orbital plates on inferior portion of frontal bones separated by-
A
ethmoidal notch
22
Q
ethmoidal notch receives-
A
cribriform plate of the ethmoid bone
23
Q
interesting fact ab frontal sinuses-
A
are as distinct as fingerprints
24
Q
2 parietal bones are ____-
A
square
25
2 parietal bones have a ___ external surface & a ____ internal surface-
convex external surface & concave internal surface
26
each parietal bone articulates with-
frontal, temporal, occipital, sphenoid, & each other
27
sphenoid is an irregular shaped bone that resembles-
bat with its wings extended
28
sphenoid bone located-
situated at base of cranium anterior to temporal bone
29
sphenoid bone consists of-
body & 2 greater & lesser wings that project laterally from the sides of body
30
body of sphenoid contains-
2 sphenoidal sinuses
31
2 sphenoidal sinuses separated by-
a median septum
32
superior surface of sphenoid bone presents-
deep depression called the sella turica
33
Sella turica contains-
the pituitary glands
34
sella turica lies in the-
MSP of the cranium
35
sella turica bounded ____ by the-
bound posteriorly by the dorsum sallae
36
dorsum sallae bears the-
posterior clinoidal process
37
on the anterior surface of the sella turica are the-
38
occipital bone located-
situated at posterior & inferior part of cranium
39
occipital bones 4 parts-
-occipital squama
-2 occipital condyles
-basilar portion
40
occipital bone large aperture-
foramen magnum
41
_____ passes through the foramen-
medulla
42
external landmark located on the posterior/inferior of the occipital-
external occipital protuberance
43
temporal bone location-
irregular shaped bone situated on each side of the cranium b/w the greater sphenoid wings
44
each temporal bone contains-
-squamous & tympanic portions
-styloid & zygomatic processes
-petromastoid (petrous & mastoid)
45
zygomatic process projects-
anteriorly
46
zygomatic process articulates with-
the zygomatic bone of the face & completes the zygomatic arch
47
located on the inferior surface of the zygomatic process-
depression that receives the mandibular condyle to form the TMJ
48
also located on the temporal bone-
49
ethmoid bone location-
sits inferior to the frontal bone & just inside the ethmoidal notch
50
ethmoidal features identifiable in radiographs- (6)
spongy labyrinths, air cells, cribriform plate, crista galli, & superior & middle nasal concha
51
3 sets of air cells-
anterior, middle, & posterior
52
3 cranial morphologies & how they present-
anterior, posterior, mastoid, & sphenoidal; located by name
53
outer canthus-
outer corner of eye
54
infraorbital margin-
lower margin of eye
55
gonion-
angle of mandible (bony curve of jaw)
56
mental point-
tip of chin
57
acanthion-
center of pupils
58
nasion-
b/w frontal & nasal bones
59
glabella-
60
MSP-
61
IPL-
b/w pupils when pts. eyes directed forward
62
GML-
b/w glabella & EAM
63
OML-
b/w outer canthus & EAM
64
IOML-
b/w infraorbital margin & EAM
65
AML-
b/w acanthion & EAM
66
MML-
b/w mental point & EAM
67
Cranial bones divided into-
Calvaria & floor bones
68
Mesophalic-
typical/average
69
Brachycephalic-
short- front to back, wide- side to side
70
Dolichocephalic-
long- front to back, narrow- side to side
71
4 groups of sinuses-
frontal, ethmoidal, sphenoidal, & maxillary
72
4 groups of sinuses named after-
the bones in which they're located
73
only sinus group in the facial bones-
maxillary
74
functions of sinuses (5)-
-serves as resonating chamber for voice
-decreases weight of skull by containing air
-helps warm moistened, inhaled air
-acts as shock absorber in trauma
-possibly some control in immune system
75
sinuses also called-
paranasal sinuses
76
why are the sinuses also called paranasal sinuses?
bec of formation w: nasal mucosa & continued communication w: nasal fossa
77
Which projection are all 4 sinus groups seen?
lateral
78
Maxillare sinuses are present when?
at birth
79
frontal & ethmoidal sinuses form when?
at age 6 or 7
80
ethmoidal air cells form during-
puberty
81
all sinuses are completely developed when-
age 17 or 18
82
when fully dev., each of sinuses communicate w:-
each other & nasal cavity
83
mastoid air cells located in-
mastoid processes
84
which sinus isn't considered a paranasal sinus, but can contain infection?
mastoid air cells
85
largest sinuses-
2 maxillary
86
2nd largest sinuses-
2 frontal
87
how many maxillary sinuses are there?
2
88
how many ethmoidal sinuses are there?
2
89
ethmoidal sinuses can be subdivided into-
posterior, middle, anterior, & ___ air cells
90
how many frontal sinuses are there?
2
91
how many sphenoidal sinuses are there?
may have 1 or 2
92
number of facial bones-
14, most are in pairs
93
2 nasal bones are-
small, flat, & thin
94
2 nasal bones form-
superior wall of nasal cavity & "bridge of nose"
95
smallest bones in the skull-
2 lacrimal bones
96
both lacrimal bones located-
at anterior part of medial wall of orbits
97
together w: the maxillae, lacrimal bones form-
lacrimal fossa which accommodate lacrimal ducts (tear ducts)
98
lacrimal bones contain-
small lacrimal foramen for passage of tear duct
99
interior of maxillae contain-
large maxillary sinuses
100
on inferior borders maxillae contain-
thick spongy ridges called alveolar process
101
alveolar process supports-
roof of teeth
102
at their junction, maxillae form-
anterior nasal spine
103
center of anterior nasal spine referred to exteriorly as-
acanthion
104
2 zygomatic bones form-
prominence of cheeks
105
posteriorly projecting temporal process unites w:-
zygomatic process of temporal bone to form zygomatic arch
106
2 palatine bones are-
L-shaped w: vertical & horizontal plates
107
both palatine bones complete-
posterior 1/4 of roof of mouth
108
2 inferior nasal conchae located-
just below ethmoid bone
109
2 superior & middle nasal conchae are-
processes of ethmoid bone
110
vomer-
thin plate of bone situated at MSP on floor of nasal conchae
111
vomer completes-
lower part of nasal septum w: the perpendicular plate of the ethmoid bone
112
mandible-
largest & densest bone of the face
113
mandible consists of-
-curved horizontal portion called the body
-2 vertical portions called rami
114
2 rami unite w: the body at-
unite at an angle of mandible or gonion
115
2 projection on the most superior portion of the rami-
coronoid & condylar processes
116
coronoid & condylar processes separated by-
mandibular notch
117
mental protuberance-
-tip of chin
-sometimes called mental point
118
symphysis-
where 2 sides of the body are fused
119
mental foramina-
on each side of the body for transmission of nerves & vessels
120
alveolar portion-
roofs of teeth
