Which of the following cranial nerves innervates only one muscle of the eyeball?

A) Optic nerve
B) Facial nerve
C) Trochlear nerve
D) Trigeminal nerve
E) Oculomotor nerve

Cranial Nerves

Twelve pairs of nerves that originate in the brain and control a variety of functions including sensation, motor skills, and autonomic functions in the head and neck.

Trochlear Nerve

The fourth cranial nerve, responsible for controlling the superior oblique muscle of the eye, which allows for rotational movement.

Eyeball

The spherical part of the eye that contains the structures responsible for vision, including the lens, retina, and cornea.