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Spinal Anatomy I - Exam 3 > Middle Cranial Fossa > Flashcards

Middle Cranial Fossa Flashcards

1
Q

What are the boundaries for the middle cranial fossa?

A
  • anterior: lesser wings, anterior clinoid processes, and sphenoidal jugum of sphenoid bone
  • posterior: superior border of petrous part of temporal bone, posterior clinoid porcesses, and dorsum sella of sphenoid bone
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2
Q

What part of the cerebrum occupies the middle cranial fossa?

A

temporal poles of temporal lobes of cerebrum

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3
Q

What prominent parts of the brain rest on the middle cranial fossa?

A
  • temporal poles of temporal lobes of cerebrum
  • hypophysis cerebri
  • optic chiasma
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4
Q

What bony feature is prominent in the median plane of the middle cranial fossa?

A

sella turcica

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5
Q

What are the parts of the sella turcica?

A
  • anterior clinoid processes
  • sphenoidal jugum
  • posterior clinoid processes
  • dorsum sella
  • hypophyseal fossa of sphenoid bone
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6
Q

What forms the anterior boundary for the sella turcica?

A
  • anterior clinoid processes

- sphenoidal jugum

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7
Q

What forms the posterior boundary for the sella turcica?

A
  • posterior clinoid processes

- dorsum sella

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8
Q

What forms the floor of the sella turcica?

A

hypophyseal fossa

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9
Q

What forms the roof of the sella turcica?

A

diaphragma sella

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10
Q

What neural structure occupies the sella turcica?

A

hypophysis cerebri or pituitary gland

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11
Q

What neuronal structure is located in front of the pituitary gland?

A

optic chiasmata

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12
Q

Which cranial nerves exit the skull via middle cranial fossa ostia?

A

cranial nerves II, III, IV, V, and VI

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13
Q

What will the optic canal communicate with?

A
  • middle cranial fossa

- orbit

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14
Q

What are the contents of the optic canal?

A
  • optic nerve

- ophthalmic artery

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15
Q

What will the superior orbital fissure communicate with?

A
  • middle cranial fossa

- orbit

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16
Q

What are the contents of the superior orbital fissure?

A
  • ophthalmic veins
  • oculomotor nerve
  • trochlear nerve
  • ophthalmic division of the trigeminal nerve
  • abducent nerve
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17
Q

What cranial nerves are located within the superior orbital fissure?

A
  • cranial nerve III (oculomotor)
  • cranial nerve IV (trochlear)
  • cranial nerve Va (ophthalmic division of the trigeminal)
  • cranial nerve VI (abducent)
18
Q

Which single opening will allow the exit of the greatest number of cranial nerves?

A

superior orbital fissure

19
Q

What is unique about the ophthalmic artery and veins?

A
  • unlike other artery-vein combinations, they will not share the same opening
  • the ophthalmic artery is in the optic canal
  • ophthalmic veins are in the superior orbital fissure
20
Q

What will the foramen rotundum communicate with?

A
  • middle cranial fossa

- pterygopalatine fossa

21
Q

What are the contents of the foramen rotundum?

A

maxillary division of the trigeminal nerve (cranial nerve Vb)

22
Q

What will the foramen ovale communicate with?

A
  • middle cranial fossa

- infratemporal region

23
Q

What are the contents of the foramen ovale?

A
  • mandibular division of the trigeminal nerve (Vc)

- lesser petrosal branch of the glossopharyngeal nerve

24
Q

What will the foramen spinosum communicate with?

A
  • middle cranial fossa

- infratemporal region

25
Q

What are the contents of the foramen spinosum?

A
  • nervus spinosus from the mandibular division of the trigeminal nerve
  • middle meningeal artery
26
Q

What bones converge to form the foramen lacerum?

A
  • temporal
  • sphenoid
  • occipital
27
Q

What will the foramen lacerum communicate with in the living person?

A
  • it crosses between parts of the middle cranial fossa

- it is not a major exit from the skull as would be suggested by the dry skull

28
Q

What are the contents of the foramen lacerum?

A
  • internal carotid artery
  • carotid sympathetic nerve plexus
  • venous plexus
29
Q

What will the carotid canal communicate with?

A
  • middle cranial fossa

- parotid region

30
Q

What are the contents of the carotid canal?

A
  • internal carotid artery

- carotid sympathetic nerve plexus

31
Q

What will the hiatus for the greater (superficial) petrosal nerve communicate with?

A
  • middle cranial fossa

- temporal bone

32
Q

What are the contents of the hiatus for the greater petrosal nerve?

A

greater (superficial) petrosal nerve, a branch of the facial nerve

33
Q

What forms the vidian nerve/nerve of the pterygoid canal?

A
  • greater (superficial) petrosal nerve from the facial nerve

- deep petrosal nerve from the carotid sympathetic nerve plexus

34
Q

What will the vidian canal/pterygoid canal communicate with?

A
  • middle cranial fossa

- pterygopalatine fossa

35
Q

What are the contents of the vidian/pterygoid canal?

A

the vidian nerve or the nerve of the pterygoid canal

36
Q

What will the hiatus for the lesser petrosal nerve communicate with?

A
  • middle cranial fossa

- temporal bone

37
Q

What are the contents of the hiatus for the lesser petrosal nerve?

A

lesser petrosal nerve, a branch of the tympanic plexus from the glossopharyngeal nerve

38
Q

How will the lesser petrosal nerve typically exit the middle cranial fossa?

A

foramen ovale

39
Q

What are the various ostia observed in the middle cranial fossa?

A
  • optic canal
  • superior orbital fissure
  • foramen rotundum
  • foramen ovale
  • foramen spinosum
  • hiatus for the greater (superior) petrosal nerve
  • vidian/pterygoid canal
  • hiatus for the lesser petrosal nerve
  • carotid canal
  • foramen lacerum
40
Q

What cranial nerves are represented in the middle cranial fossa?

A
  • cranial nerve II (optic)
  • III (oculomotor)
  • IV (trochlear)
  • Va (ophthalmic division of the trigeminal)
  • Vb (maxillary division of the trigeminal)
  • Vc (mandibular division of the trigeminal)
  • VI (abducent)
  • VII (greater/superficial petrosal nerve of the facial)
  • IX (lesser petrosal nerve of the glossopharyngeal)
41
Q

Which ostia will not exit the skull from the middle cranial fossa in the living person?

A
  • foramen lacerum
  • hiatus for the greater (superior) petrosal nerve
  • hiatus for the lesser petrosal nerve

Spinal Anatomy I - Exam 3 (94 decks)

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