Which cranial nerve is associated with the anterior cranial fossa?

Which cranial nerve is associated with the anterior cranial fossa?

• A. CN II
• B. CN V
• C. CN I
• D. CN IX

Answer: (C)

The anterior cranial fossa houses the olfactory system, with olfactory nerve fibers traveling from the nasal mucosa through the cribriform plate of the ethmoid bone to the olfactory bulbs in this fossa. This nerve (CN I) carries special sensory information for smell, which is why it is the one associated with the anterior cranial fossa. The optic nerve (CN II) is linked to the middle cranial fossa, the trigeminal branches through other openings in the middle fossa, and the glossopharyngeal nerve (CN IX) is associated with the posterior regions.

The anterior cranial fossa houses the olfactory system, with olfactory nerve fibers traveling from the nasal mucosa through the cribriform plate of the ethmoid bone to the olfactory bulbs in this fossa. This nerve (CN I) carries special sensory information for smell, which is why it is the one associated with the anterior cranial fossa. The optic nerve (CN II) is linked to the middle cranial fossa, the trigeminal branches through other openings in the middle fossa, and the glossopharyngeal nerve (CN IX) is associated with the posterior regions.