Which structure does NOT receive supply from the oculomotor nerve?

Correct Answer: C

Rationale: The oculomotor nerve (CN III) supplies medial rectus, ciliary body, levator palpebrae superioris, and inferior oblique. The lateral rectus (option e) is innervated by the abducent nerve (CN VI), not CN III.

Correct Answer: C

Rationale: The trochlear nerve (CN IV) innervates only the superior oblique. The trigeminal (V) has motor and sensory roles, abducens (VI) exits via the superior orbital fissure, and hypoglossal (XII) exits via the hypoglossal canal.

Correct Answer: B

Rationale: The vagus nerve (CN X) arises from the medulla, with nucleus ambiguus fibers (shared with CN XI origins) for pharyngeal/laryngeal muscles. It doesn’t supply the diaphragm (phrenic nerve) or face.

Correct Answer: D

Rationale: The auriculotemporal nerve is a mandibular (V3) branch, supplying the scalp and TMJ. Infraorbital (V2), external nasal (V1), and zygomaticofacial (V2) are not V3.

Correct Answer: D

Rationale: Trochlear (CN IV) paralysis prevents downward gaze when the eye is adducted (superior oblique). Abducens (VI) paralysis causes medial deviation.