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Anatomy - Head and Neck > Week 3: Station 5 - Floor of the Skull > Flashcards

Week 3: Station 5 - Floor of the Skull Flashcards

1
Q

Which bone forms the posterior boundary of the anterior cranial fossa?

A

Sphenoid

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2
Q

Which bones form the

A) anterior boundary

B) floor

C) posterior boundary

of the middle cranial fossa?

A

A) Sphenoid

B) Sphenoid and temporal

C) Occipital

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3
Q

What is shown here and what 4 bones meet at this suture?

A

Pterion

  • Frontal
  • Temporal
  • Parietal
  • Sphenoid
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4
Q

Which bones form the anterior and posterior border of the posterior cranial fossa?

A

Anterior - temporal

Posterior - Occipital

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5
Q
A
  1. Cribriform plate
  2. Crista galli
  3. Anterior cranial fossa
  4. Optic canal
  5. Foramen rotundum
  6. Foramen ovale
  7. Foramen spinosum
  8. Foramen lacerum
  9. Sella turcica
  10. Foramen magnum
  11. Hypoglossal canal
  12. Jugular foramen
  13. Internal acoustic meatus
  14. Superior orbital fissure
  15. Incisive foramen
  16. Inferior orbital fissure
  17. Palantine foramen
  18. Pterygoid plate
  19. Condylar foramen
  20. Stylomastoid foramen
  21. Carotid canal
  22. Styloid process
  23. Zygomatic arch
  24. Mastoid process
  25. Occipital condyle
  26. Mandibular fossa
  27. External occipital protuberance
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6
Q

What passes through the cribriform plate?

A

Olfactory nerve

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7
Q

What passes through the optic foramen?

A

Optic nerve

Opthalmic artery

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8
Q

What passes through the superior orbital fissure?

A

Occulomotor nerve

Trochlear nerve

Opthalmic division (V1)

Abducens nerve

Opthalmic veins

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9
Q

What passes through the foramen rotundum?

A

Maxillary division (V2)

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10
Q

What passes through the foramen ovale?

A

Mandibular division (V3)

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11
Q

What passes through the foramen spinosum?

A

MMA

MMV

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12
Q

What passes through the foramen lacerum?

A

Greater petrosal nerve

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13
Q
A
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14
Q

What passes through the carotid canal?

A

ICA

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15
Q

What passes through the internal acoustic meatus?

A

Facial

Vestibulocochlear

Labyrinth artery

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16
Q

What passes through the jugular foramen?

A

Glossopharyngeal (IX)

Vagus (X)

Accessory (XI)

IJV

Posterior meningeal artery

17
Q

What passes through the hypoglossal foramen?

A

Hypoglossal nerve

18
Q

What passes through the foramen magnum?

A

Spinal cord

Vertebral arteries

Anterior spinal artery

Posterior spinal artery

Spinal part of accessory nerve (XI)

19
Q

Between what layers are venous sinuses located?

A

The inner and outer layers of the dura

20
Q

What vessel forms the groove that starts lateral to the foramen spinosum??

A

Middle Meningeal artery

21
Q

What is significant about the course of the MMA?

A

It travels across the inner surface of the pterion

This makes it vunerable to damage from a blow to the head as the pterion is very weak

22
Q
A
23
Q

What is shown here?

A

Internal occipital protuberance

24
Q

What structure makes this groove?

A

Transverse venous sinus

25
Q

What forms this groove?

A

Sigmoid sinus

26
Q

What does the sigmoid sinus drain into?

A

The IJV through the jugular foramen

27
Q

What is this?

A

Sella turcica - “Turkish saddle”

A deep depression in the midline in the middle cranial fossa that houses the pituitary

28
Q

Which bone is the sella turcica found in?

A

Sphenoid

29
Q

What is shown here

A

Anterior clinoid process

30
Q

What is shown here?

A

Posterior clinoid process

31
Q

What do the anterior and posterior clinoid processes attach?

A

Tentorum cerebelli

32
Q

What is housed in the groove either side of the sella turcica?

A

The cavernous sinus

33
Q

What passes through the cavernous sinus to reach the superior orbital fissure?

A

All the structures that leave through the superior orbital fissure

34
Q

What is shown here?

A

Pterygoid plates

35
Q

What muscles attach to the lateral pterygoid plate?

A

Pterygoid muscles

36
Q

What muscles attach to the medial pterygoid plate?

A

Superior constrictor

Anatomy - Head and Neck (19 decks)

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