The frontal nerve is a branch of which division of the trigeminal nerve?

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Prepare for the NBEO Ocular Anatomy Posterior Segment and Cranial Nerves Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

The frontal nerve is a branch of which division of the trigeminal nerve?

Explanation:
The frontal nerve is a branch of the ophthalmic division of the trigeminal nerve (the first division, V1). V1 carries sensory fibers from the forehead, upper eyelid, and cornea, and it gives rise to the frontal nerve, which then divides into supraorbital and supratrochlear nerves to supply the forehead and scalp. The other options aren’t correct because they involve different nerves: the maxillary division (V2) handles midface sensation, while the oculomotor (CN III) and abducens (CN VI) nerves are motor nerves to the eye muscles, not trigeminal sensory branches.

The frontal nerve is a branch of the ophthalmic division of the trigeminal nerve (the first division, V1). V1 carries sensory fibers from the forehead, upper eyelid, and cornea, and it gives rise to the frontal nerve, which then divides into supraorbital and supratrochlear nerves to supply the forehead and scalp. The other options aren’t correct because they involve different nerves: the maxillary division (V2) handles midface sensation, while the oculomotor (CN III) and abducens (CN VI) nerves are motor nerves to the eye muscles, not trigeminal sensory branches.

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