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OS 204 > Foramina of the Skull > Flashcards

Foramina of the Skull Flashcards

1
Q

What are the foramina found in the anterior cranial fossa?

A

Foramen cecum; cribriform foramina (in cribriform plate); anterior and posterior ethmoidal foramina

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2
Q

What are the foramina found in the middle cranial fossa?

A

Optic canals; superior orbital fissure; foramen rotundum; foramen ovale; foramen spinosum; foramen lacerum; groove or hiatus of greater petrosal nerve

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3
Q

What are the foramina found in the posterior cranial fossa?

A

Foramen magnum; jugular foramen; hypoglossal canal; condylar canal; mastoid foramen

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4
Q

What is CN I?

A

Olfactory

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5
Q

Where does CN I exit in the skull?

A

Cribriform plate

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6
Q

What is CN II?

A

Optic

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7
Q

Where does CN II exit in the skull?

A

Optic canal

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8
Q

What is CN III?

A

Oculomotor

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9
Q

Where does CN III exit in the skull?

A

Superior orbital fissure

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10
Q

What is CN IV?

A

Trochlear

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11
Q

Where does CN IV exit in the skull?

A

Superior orbital fissure

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12
Q

What is CN V1?

A

Opthalmic

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13
Q

Where does CN V1 exit in the skull?

A

Superior orbital fissure

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14
Q

What is CN V2?

A

Maxillary

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15
Q

Where does CN V2 exit in the skull?

A

Foramen rotundum

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16
Q

What is CN V3?

A

Mandibular

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17
Q

Where does CN V3 exit in the skull?

A

Foramen ovale

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18
Q

What is CN VI?

A

Abducent

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19
Q

Where does CN VI exit in the skull?

A

Superior orbital fissure

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20
Q

What is CN VII?

A

Facial

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21
Q

Where does CN VII exit in the skull?

A

Internal acoustic canal

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22
Q

What is CN VIII?

A

Vestibulo-cochlear

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23
Q

Where does CN VIII exit in the skull?

A

Internal acoustic canal

24
Q

What is CN IX?

A

Glossopharyngeal

25
Q

Where does CN IX exit in the skull?

A

Jugular foramen

26
Q

What is CN X?

A

Vagus

27
Q

Where does CN X exit in the skull?

A

Jugular foramen

28
Q

What is CN XI?

A

Spinal accessory

29
Q

Where does CN XI exit in the skull?

A

Jugular foramen

30
Q

What is CN XII?

A

Hypoglossal

31
Q

Where does CN XII exit in the skull?

A

Hypoglossal canal

32
Q

What vein exits through the jugular foramen?

A

Internal jugular vein

33
Q

Where does the internal jugular vein exit in the skull?

A

Jugular foramen

34
Q

What structures exit from the jugular foramen of the skull?

A

Glossopharyngeal (IX); vagus (X); spinal accessory (XI); internal jugular vein

35
Q

What nerves exit from the internal acoustic canal of the skull?

A

Facial (VII); vestibulo-cochlear (VIII)

36
Q

What nerves exit from the superior orbital fissure of the skull?

A

Oculomotor (III); trochlear (IV); ophthalmic (V1); abducent (VI)

37
Q

What nerve exits from the cribriform plate of the skull?

A

Olfactory (I)

38
Q

What nerve exits from the optic canal of the skull?

A

Optic (II)

39
Q

What nerve exits from the foramen rotundum of the skull?

A

Maxillary (V2)

40
Q

What nerve exits from the foramen ovale of the skull?

A

Mandibular (V3)

41
Q

What structures pass through the foramen cecum?

A

Nasal emissary vein (1% of population)

42
Q

What structures pass through the cribriform foramina in the cribriform plate?

A

Axons of olfactory cells in olfactory epithelium that form olfactory nerves

43
Q

What structures pass through the anterior and posterior ethmoidal foramina?

A

Vessels and nerves of the same name

44
Q

What structures pass through the optical canals?

A

Optic nerves (I) and ophthalmic arteries

45
Q

What structures pass through the superior orbital fissure?

A

Ophthalmic veins; ophthalmic nerve (V1); oculomotor nerve (III); trochlear nerve (IV); abducent nerve (VI)

46
Q

What structure passes through the foramen rotundum?

A

Maxillary nerve (V2)

47
Q

What structures passes through the foramen ovale?

A

Mandibular nerve (V3) and accessory meningeal artery

48
Q

What structures pass through the foramen spinosum?

A

Middle meningeal artery and vein; meningeal branch of mandibular nerve (V3)

49
Q

What structures pass through the foramen lacerum?

A

Deep petrosal nerve; meningeal artery branches; small veins; internal carotid artery and sympathetic and venous plexuses

50
Q

What structures pass through the groove or hiatus of the greater petrosal nerve?

A

Greater petrosal nerve; petrosal branch of meningeal artery

51
Q

How do structures pass through the foramen lacerum?

A

Horizontally instead of vertically

52
Q

What structures pass through the foramen magnum?

A

Medulla and meninges; vertebral arteries; spinal accessory nerve (XI); dural veins; anterior and posterior spinal arteries

53
Q

What structures pass through the jugular foramen?

A

Glossopharyngeal nerve (IX); vagus nerve (X); spinal accessory (XI); superior bulb of internal jugular vein; inferior petroid and sigmoid sinuses; meningeal branches of ascending pharyngeal and occipital arteries

54
Q

What structures pass through the hypoglossal canal?

A

Hypoglossal nerve (XII)

55
Q

What structures pass through the condylar canal?

A

Emissary vein (from sigmoid sinus to vertebral veins in neck)

56
Q

What structures pass through the mastoid foramen?

A

Mastoid emissary vein (from sigmoid sinus and meningeal artery of occipital artery)

OS 204 (5 decks)

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