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MSK100 > Skull & Cranium > Flashcards

Skull & Cranium Flashcards

1
Q

Neurocranium function?

A

protect the brain

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2
Q

Viscerocranium function?

A

forms the face

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3
Q

What 6 bones form the neurocranium?

A
  1. Parietal bone (paired)
  2. Temporal bone (paired)
  3. Frontal bone
  4. Occipital bone
  5. Sphenoid bone
  6. Ethmoid bone
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4
Q

What 8 bones form the viscerocranium?

A
  1. Lacrimal bone
  2. Nasal bone
  3. Zygomatic bone
  4. Maxilla
  5. Inferior nasal concha
  6. Palatine bone
  7. Mandible (unpaired)
  8. Vomer (unpaired)
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5
Q

What is a Pterion?

A

-junction of 4 bones (frontal, sphenoid, temporal, parietal).
-thinnest part of the skull
-middle meningeal a. is behind

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6
Q

What is the suture between the frontal and parietal bones?

A

Coronal suture

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7
Q

What is the suture between the parietal bones?

A

Sagittal suture

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8
Q

What is the suture between the partial and occipital bones?

A

lamboid suture

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9
Q

Bregma?

A

Where coronal suture and sagittal suture meet.

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10
Q

Lambda?

A

Where sagittal suture and lamboid suture meet.

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11
Q

What are fontanelles?

A

In a newborn skull, where the junctions of suture are made from soft tissues and not completely closed, to allow room for the brain to grow.

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12
Q

When does the anterior fontanelle close?

A

12-18 months after birth

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13
Q

When does the lateral fontanelle’s close?

A

6 months after birth

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14
Q

When does the posterior fontanelle close?

A

2-3 months after birth

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15
Q

What bones make up the anterior cranial fossa?

A
  1. Frontal bones
  2. Ethmoid bones
  3. Sphenoid bone (body & lesser wing)
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16
Q

What bones make up the middle cranial fossa?

A
  1. Sphenoid bone
  2. Temporal bone
17
Q

What bones make up the posterior cranial fossa?

A
  1. Temporal bones
  2. Parietal bones
  3. Occipital bones
18
Q

What 3 structures are found on the anterior cranial fossa?

A
  1. Orbital plate
  2. Cribiform Plate
  3. Crista Galli
19
Q

Cribiform plate?

A

Allows passage of CN I: olfactory n.

20
Q

Crista Galli?

A

Attachment of Falx Cerebri (dura matta attaches)

21
Q

What 9 structures are on the middle cranial fossa and which bone are they found on?

A
  1. Sella Turcica
  2. Groove for superior petrosal sinus
  3. Optical canal
  4. Superior orbital fissure
  5. Formen rotundum
  6. Foramen Ovale
  7. Foramen Spinosum
  8. Foramen lacerum
  9. Coratid canal

** all sphenoid bone except carotid canal & groove for superior perusal sinus = temporal bone

22
Q

Sella turcica?

A
  1. hypophyseal fossa (holds pituitary gland)
  2. Dorsum Sellae
23
Q

Structures that pass through the optic canal (2)?

A
  1. CNII: optic n.
  2. Ophthalmic a
24
Q

Structures that pass through the Superior Orbital Fissure (5)?

A
  1. CN III: Oculomotor n.
  2. CN IV: Trochlear n.
  3. CNV1: Ophthalmic n.
  4. CNVI: Abducens n
  5. Superior Ophthalmic v.
25
Q

What structure passes through the foramen rotundum?

A

CNV2: Maxillary n.

26
Q

What structures pass through the foramen ovale (2)?

A
  1. CNV3: Mandibular n.
  2. Accessory Meningeal a.
27
Q

What structures pass through the Foramen Spinosum (3)?

A
  1. Middle meningeal a.
  2. Middle meningeal v.
  3. Meningeal branch of CNV3.
28
Q

What is a feature of foramen lacerum?

A

Covered by cartilage.

29
Q

What structure passes through the carotid canal?

A

Internal carotid a.

30
Q

What 6 structures are located on the posterior cranial fossa and what bone are they located on?

A
  1. Internal acoustic meatus (temporal)
  2. Jugular Foramen (btw occipital & temporal)
  3. Hypoglossal Canal (occipital)
  4. Foramen Magnum (occipital)
  5. Groove for sigmodial sinus (Temporal)
  6. Groove for transverse sinus (occipital)
31
Q

What structures pass through the Internal Acoustic Meatus (2)?

A
  1. CNVII: Facial n.
  2. CNVIII: Vestibulocochlear n.
32
Q

What structures pass through the Jugular Foramen (3)?

A

1.CNIX: Glossopharyngeal n.
2. CNX: Vagus n.
3. CNX1: Accessory spinal n.

33
Q

What structure passes through the Hypoglossal canal?

A
  1. CNXII: Hypoglossal n.
34
Q

What structures pass through the Foramen Magnum (4)?

A
  1. Medulla oblongata
  2. Meninges
  3. Vertebral a.
  4. Spinal roots of CN IX

MSK100 (22 decks)

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