NPTE Cranial Nerves Practice Test

The correct answer includes all three cranial nerves involved in controlling eye movement: the oculomotor nerve, the trochlear nerve, and the abducens nerve. Each of these nerves has specific functions related to the movement of the eyes.

The oculomotor nerve is primarily responsible for controlling most of the eye's movements, including the elevation of the eyelid and the adjustment of the pupil in response to light. It innervates several extraocular muscles, allowing for complex movements such as upward, downward, and medial gaze.

The trochlear nerve innervates the superior oblique muscle, which is crucial for downward and lateral eye movements. This nerve plays a significant role, particularly in movements that require the eye to rotate downward, such as looking down stairs.

The abducens nerve specifically controls the lateral rectus muscle, allowing for abduction of the eye, which means moving the eye away from the midline. This is essential for horizontal movements of the eye.

Since all three nerves work in coordination to support versatile and comprehensive eye movement, stating that all are involved in controlling the movement of the eyes captures the complete picture of ocular function.