all bones Flashcards

1
Q

coronal suture

A

separates the frontal and parietal bones

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2
Q

sagittal suture

A

separates parietal bones from one another

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3
Q

squamosal suture

A

connects a single temporal bone to a single parietal bone on each side

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4
Q

lamboidal suture

A

connects both parietal bones with the occipital bone

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5
Q

occipitomastoid suture

A

separates occipital bone and the mastoid portion of the temporal bone

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6
Q

sphenosquamosal suture

A

separates the sphenoid bone and the squamosal portion of the temporal bone

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7
Q

zygomaticotemporal suture

A

separates the zygomatic bone and the zygomatic process of the temporal bone

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8
Q

how many bones make up the cranium

A

6 (1 occipital, 1 frontal, 2 temporals, 2 parietals)

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9
Q

superciliary arches

A
  • on the frontal bone
  • lie above the medial ends of the eyebrow
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10
Q

glabella

A
  • on the frontal bone
  • between the superciliary arches
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11
Q

frontal eminences

A
  • on the frontal bone
  • rounding prominences at the upper part of the forehead
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12
Q

supraorbital margin

A
  • on frontal bone
  • upper rim of the eye socket
  • inferior to the superciliary arches
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13
Q

foramen magnum

A
  • in the occipital bone
  • large opening for the spinal cord under the skull
  • used to restore decapitations
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14
Q

occipital condyle

A
  • the place where the atlas attaches the skull
  • two condyles near the foramen magnum
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15
Q

superior nuchal line

A
  • on the occipital bone
  • two curved lines extending out from the external occipital protuberance
  • the lower one is called the superior one
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16
Q

occipital protuberance

A
  • on the occipital bone
  • small jutting eminence
  • midway between the foramen magnum and the angular summit of the bone
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17
Q

parietal bone makes up how much of the cranium

A

2/3

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18
Q

parietal eminence

A
  • on the parietal bone
  • just above the posterior border of the ears
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19
Q

what determines the widest part of the cranium

A

parietal bones (the eminences)

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20
Q

squama

A
  • in the temporal bone
  • scale like and thin, translucent
  • curves medially and is relatively deep behind the zygomatic arch
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21
Q

external auditory meatus

A
  • in temporal bone
  • ear passage
  • tympanic (curved)
  • inferior to the squama
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22
Q

mandibular fossa

A
  • in the temporal bone
  • part of the squama
  • small depression on the under surface
  • fits the condyle of the lower jaw
  • lies anterior to the ear passage
23
Q

mastoid process

A
  • in temporal bone
  • creates posterior part of the bone
  • lateral to the earlobe
  • the muscle attachment site for the sternocleidomastoid muscle
24
Q

zygomatic process

A
  • part of the temporal bone
  • connects to the zygomatic arch
  • projects from lower part of the squama
  • long and thin, extends anteriorly to the cheekbone
  • determines the widest part of the face
25
Q

the 2 interior bones of the cranium

A
  • ethmoid
  • sphenoid
26
Q

ethmoid bone

A
  • cribriform plate
  • nose area
27
Q

sphenoid bone

A
  • shaped like a bat/butterfly
  • mostly internal
28
Q

inferior nasal conchae

A
  • thin bones projecting from the nasal cavity
29
Q

lacrimal bones

A
  • in the eye socket
  • the lacrimal sac can be punctured during tissue building
30
Q

mandible

A
  • largest bone of the face
  • this is a check point for facial curvature
31
Q

angle of the mandible

A
  • widest part of the jaw
  • where the ramus joins the inferior border of the body of the mandible
  • it influences the form of the head from a frontal view
  • measurement is similar to the distance between zygomatic bones
32
Q

ramus

A
  • vertical portion of the mandible
  • has the mandibular condyle and coronoid process
33
Q

coronoid process

A
  • located on the mandible
  • shaped like a crow beak
  • the anterior process of the ramus to which the temporalis muscle attaches
34
Q

mandibular condyle

A
  • located on the mandible
  • posterior process of the ramus
  • rounded eminence at the articulation end of the mandible
  • goes in the mandibular fossa
35
Q

body (of the mandible)

A
  • part of the mandible
  • the horizontal portion
  • has the alveolar margin which holds your teeth
36
Q

alveolar process

A
  • on the mandible
  • holds 16 sockets for teeth
  • inferior set of teeth sets lightly with those of the maxilla (affects surface contour)
  • loss of teeth will change appearance
37
Q

mandibular symphysis

A
  • on the mandible
  • vertical line found along the midline on the body of the mandible
  • two portions meet at a 110 degree angle
38
Q

mental protuberance

A
  • on the mandible
  • triangular, midline elevation found along the external surface of the body of the mandible
  • contributes to the formation of the prominence of the chin and its continuous: superiorly with the mandibular symphysis
39
Q

mental tubercle

A
  • on the mandible
  • paired bony prominence on each side of the mental protuberance
40
Q

alveolar crest

A
  • on the mandible
  • between the mental eminence and incisor teeth
  • surface recedes
  • responsible for recession of central plane of lower integumentary lip
41
Q

maxilla

A
  • two fused bones
  • there are three process (frontal, palatine, zygomatic)
  • holds the top teeth
42
Q

nasal spine

A
  • in the maxilla
  • used to anchor mouth closure
  • the 2 maxilla bones fuse to form inferior margin of the nasal cavity
  • send out a small sharp spur
  • projection creates bony anatomical limit of the nose
43
Q

alveolar margin (process)

A
  • in the maxilla
  • thickest and most spongy part of the maxilla
  • sockets of 16 teeth
  • in adulthood its vertical dimension is increased due to development
44
Q

frontal process

A
  • in the maxilla bone
  • extends superiorly and anteriorly besides a nasal bone
  • articulates with frontal bone
  • forms most of lateral margin of nasal cavity and medial margin of orbital cavity
  • influences the lateral wall of the nose
  • most anterior portion of the cheek
45
Q

incisive fossa

A
  • in the maxilla
  • boney depression in the central front area of the undersurface of the bony hard palate, directly behind the incisors
46
Q

palatine process

A
  • in the maxilla
  • forms greater part of the roof of the mouth
  • floor of the nasal cavity
  • not a surface bone
  • has influence on the surface form
47
Q

zygomatic process

A
  • in the maxilla
  • elongated triangular structure
  • juts forward to join surface of zygomatic bone
  • provides direction of anterior natural concavity of the cheek
48
Q

nasal bones

A
  • creates the bridge of the nose
  • articulation of the two
  • anchor cartilage
  • lies directly inferior to the glabella
  • frontal and lateral surface widen as they descend
49
Q

vomer bone

A
  • inferior portion of the nasal septum
50
Q

zygomatic bones

A
  • further part of cheeks
  • like a diamond
  • creates prominence of the cheek
  • determines width of anterior plane of face
  • greatest width of anterior plane of face
    **but the zygomatic arch is the greatest width
51
Q

temporal process

A
  • part of zygomatic bone
  • surface of a zygomatic bone that articulates with the zygomatic process of the temporal bone
  • creates arch of the cheek
52
Q

frontal process

A
  • part of the zygomatic bone
  • articulates with the frontal bone
  • creates the lateral border of the eye socket
53
Q

maxillary process

A
  • part of the zygomatic bone
  • articulates with the maxilla
  • on the inferior and medial region and creates the inferior and lateral border off the eye socket
54
Q

male vs. female skulls

A
  • male = more prominent supraorbital rim
  • female = glabella is more subtle and is lighter with less defined curves bby