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Flashcards in Cranial Nerves Deck (5)
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Anterior cranial fossa

Cribriform plate

1

CN I

Discharge of CSF from the nose (rhinorrhea) in fractures of cribriform plate & dural tear

Cribriform plate

2

Middle cranial fossa

Optic canal (CN II)

Superior orbital fissure (CN III, IV, V1, VI)

Foramen rotundum (CN V2)

Foramen ovale (CN V3, lesser petrosal nerve)

Foramen spinosum (Middle meningeal artery)
- epidural hemorrhage

Foramen lacerum (empty)

3

Posterior cranial fossa

Internal acoustic meatus (CN VII, VIII)

Jugular foramen (CN IX, X, XI, sigmoid sinus- a mass in jugular foramen ➡️ dysphagia, dysarthria, paralysis of uvula, inability to shrug shoulders)

Hypoglossal canal (CN XII)

Foramen magnum (medulla of brain stem, CN XI, vertebral arteries)

4

Discharge of CSF from external acoustic meatus (otorrhea) in fracture of mastoid process and dural tear

Internal acoustic meatus