2: Skull Anatomy Flashcards

1
Q

8 cranial bones

A
  1. Parietal x2
  2. Temporal x2
  3. Frontal
  4. Occipital
  5. Sphenoid
  6. Ethmoid
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2
Q

14 facial bones

A
  1. Zygomaticus x2
  2. Lacrimal x2
  3. Nasal x2
  4. Palatine x2
  5. Maxillae x2
  6. Inferior nasal conchae x2
  7. Vomer
  8. Mandible
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3
Q

Metopic suture

A

Suture down midline of frontal bone, present if the two frontal bones don’t completely fuse

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4
Q

Frontal crest of frontal bone + what attaches to it

A

Separates two sides of neocortex; attachment for falx cerebri

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5
Q

Petrous portion of temporal bone: function

A

Protects inner ear

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6
Q

What bone is the foramen magnum in?

A

Occipital bone

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7
Q

What movement is allowed by the occipital condyles?

A

Nodding the head yes

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8
Q

Three grooves in the internal portion of the occipital bone

A

Groove for: superior sagittal sinus, transverse sinus, sigmoid sinus

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9
Q

Superior vs posterior aspect of sphenoid: what they look like

A

Superior: Batman
Posterior: butterfly

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10
Q

What sits in the sella turcica?

A

Pituitary gland

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11
Q

What exits from the foramen rotundum?

A

Maxillary branch of Trigeminal (V2)

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12
Q

What exits through foramen ovale?

A

CN V3

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13
Q

What exits through the foramen spinosum

A

Middle meningeal A

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14
Q

Articulations of the sphenoid bone

A

With almost every other bone in the skull

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15
Q

What attaches to the crista galli of the ethmoid?

A

Falx cerebri

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16
Q

What makes up the superior portion of the nasal septum?

A

Perpendicular plate of the ethmoid bone

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17
Q

What forms the superior and middle nasal conchae?

A

Ethmoidal labyrinth

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18
Q

Cribiform plate

A

Part of ethmoid bone where olfactory N descends along its lateral borders

19
Q

How to gain surgical access to cranial cavity

A

Bone flaps

20
Q

When creating bone flaps, how does the skull best heal?

A

When bones are wired/plated, and have incorporated overlying tissues (skin, muscle, fascia)

21
Q

Four major sutures

A

Coronal, sagittal, lambdoid, squamous

22
Q

Coronal suture

A

Frontal + parietal bones

23
Q

Sagittal suture

A

Both parietal bones

24
Q

Lambdoid suture

A

Parietal + occipital bone

25
Q

Squamous suture

A

Temporal + parietal bones

26
Q

Anterior, middle, and posterior fossae: what they hold

A

Anterior: frontal lobe
Middle: temporal lobe
Posterior: cerebellum

27
Q

Zygomatic arch components

A
  1. Zygomatic process of temporal bone

2. Temporal process of zygomatic bone

28
Q

Where in the orbit are the zygomatic and lacrimal bones

A

Zygomatic: lateral orbit
Lacrimal: medial orbit

29
Q

Lacrimal groove

A

Passage for nasolacrimal duct

30
Q

What do the nasal bones form?

A

Bridge of nose

31
Q

What does the vertical plate of the vomer found

A

Inferior portion of nasal septum

32
Q

What do the alae of the vomer articulate with?

A

Sphenoid

33
Q

Orbital process of palatine bone

A

Forms part of medial floor of orbit

34
Q

What does the perpendicular plate of the palatine bone form

A

Lateral wall of nasal cavity

35
Q

What does the horizontal plate of the palatine bone form?

A

Posterior hard palate

36
Q

Incisive foramen of maxilla

A

Separates hard palate + anterior nasal spine

37
Q

Alveolar process of maxilla

A

Holds teeth of upper jaw

38
Q

What is the largest paranasal sinus in the skull

A

Maxillary sinus

39
Q

Three types of Maxillary fractures

A

Le Fort I: inferior maxilla (upper lip)
Le Fort II: palatine, lacrimal, nasal bones, all of maxilla
Le Fort III: Le fort II + zygomatic bone

40
Q

What inserts on the coronoid process of the mandible?

A

Temporalis

41
Q

TMJ parts

A

Mandible + mandibular fossa of temporal bone

42
Q

Seven bones that make up the orbit

A
  1. Palatine
  2. Lacrimal
  3. Maxillary
  4. Zygomatic
  5. Ethmoid
  6. Sphenoid
  7. Frontal bone
43
Q

Four paranasal sinuses

A
  1. Frontal
  2. Sphenoid
  3. Ethmoid
  4. Maxillary
44
Q

Four fetal skull fontanelles

A
  1. Anterior
  2. Sphenoid
  3. Mastoid
  4. Posterior