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AS II - Test 3 > Skull > Flashcards

Skull Flashcards

1
Q

two functional subdivisions of the skull

A

neurocranium and viscerocranium

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2
Q

calvaria

A

dome like roof of neurocranium (skull)

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3
Q

cranial base

A

floor of neurocranium

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4
Q

eight bones that make up neurocranium

A
  1. frontal (on midline)
  2. ethmoid (on midline)
  3. sphenoid (on midline)
  4. occipital (on midline)
  5. temporal (occur as bilateral pair)
  6. parietal (occur as bilateral pair)
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5
Q

15 bones of viscerocranium

A
  1. mandible (singular on midline)
  2. ethmoid (singular on midline)
  3. Vomer (singular on midline)
  4. maxillae (bilateral pair)
  5. inferior nasal conchae (bilateral pair)
  6. zygomatic (bilateral pair)
  7. palatine (bilateral pair)
  8. nasal (bilateral pair)
  9. lacrimal (bilateral pair)
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6
Q

how does bone development differ in viscerocranium than neurocranium?

A
  • Viscerocranium: bones develop in mesenchyme of embryonic pharyngeal arches
  • Neurocranium: bones develop via
    • intramembranous ossification of head mesenchyme from neural crest
    • endochondrial ossification of cartilage (chondrocranium)
    • or via more than one type of ossification
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7
Q

orbitomeatal plane

A

anatomical position of the skull

when inferior margin of orbit and superior margin of external acoustic meatus lie in same horizontal plane

AKA frankfort plane

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8
Q

what bones seen on superior view of skull?

A

frontal bone anteriorly, R and L parietal bones laterally, occipital bone posteriorly

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9
Q

bregma

A

intersection of sagittal and coronal sutures

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10
Q

lambda

A

intersection of lamboidal and sagittal sutures

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11
Q

what do frontal and parietal eminences indicate?

A

represent initial site of ossification of frontal bone and parietal bones

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12
Q

superior and inferior nuchal line

A

area of attachement for some neck and back muscles

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13
Q

metopic suture

A

sometimes present

between right and left frontal bones

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14
Q

what goes through zygomaticofacial foramen?

A

zygomaticofacial vessels and nerve

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15
Q

name these in the orbit

A

A- frontal, B ethmoid, C lacrimal, D palatine, E maxilla, f zygomatic, g sphenoid greater wing, h sphenoid lesser wing

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16
Q

what travels through supraorbital notch/foramen

A

supraorbital vessels and nerve

17
Q

what is the infraorbital foramen for?

A

infraorbital vessels and nerve travel through it

communicates posteriorly with infra orbital canal and groove

18
Q

What passes through superior orbital fissure

A

CN III, IV, VI, V1

19
Q

what passes through inferior orbital fissure

A

V2, infraorbital vessels

20
Q

what passes through optic canal

A

CN II, opthalmic artery

21
Q

what passes through anterior and posterior ethmoidal foramen

A

anterior and posterior ethmoidal nerve, artery and veins

22
Q

location of injection for local anesthesia of premolar maxillary teeth

A

canine fossa

23
Q

what’s in anterior cranial fossa

A

frontal lobe

24
Q

what’s in middle cranial fossa

A

temporal lobes

25
Q

what’s in posterior cranial fossa

A

cerebellum and brainstem

26
Q

which cranial fossa is the largest?

A

posterior cranial fossa is largest and deepest

27
Q

What bones make up anterior cranial fossa

A

frontal, ethmoid, sphenoid

28
Q

What bones make up middle cranial fossa

A

sphenoid, temporal, parietal

29
Q

What bones make up posterior cranial fossa

A

temporal, parietal, occipital

30
Q

what 4 areas of skull seen from lateral view

A

cranial vault, facial, infratemporal, mandible

31
Q

what makes up cranial vault region

A

forehead and temporal region

32
Q

what makes up facial region

A

zygomatic, orbital, nasal regions

33
Q

describe temporal lines

A
  • two curved lines that arch up and back from zygomatic process of frontal bone, travel across frontal bone and parietal bone then go down and forward on parietal bone to end on temporal bone
  • superior limit of curved origin of temporalis muscle
34
Q

pterion

A

H shaped junction of frontal, parietal, greater wing of sphenoid and temporal bones on lateral aspect of cranial vault

35
Q

on what bone does the external auditory meatus come out of?

A

temporal bone

36
Q

inion

A

AKA external occipital protuberance

part of occipital bone that sticks out in the back

37
Q

what wraps around the styloid process?

A

tympanic plate wraps around it like a scroll

AS II - Test 3 (7 decks)

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