Ace the COT Challenge 2026 – Shine Bright as a Certified Ophthalmic Technician!

Question: 1 / 400

How many cranial nerves innervate the six extraocular muscles?

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The correct answer is three, as three cranial nerves are responsible for the motor innervation of the six extraocular muscles. These muscles control eye movements and are essential for proper vision.

The oculomotor nerve (cranial nerve III) innervates four of the six extraocular muscles: the superior rectus, infero-rectus, medial rectus, and inferior oblique. The trochlear nerve (cranial nerve IV) innervates the superior oblique muscle, while the abducens nerve (cranial nerve VI) innervates the lateral rectus muscle. Together, these three cranial nerves coordinate the movement of the eyes in different directions.

Understanding the specific roles of these nerves is crucial for anyone studying ophthalmology or pursuing certification as a Certified Ophthalmic Technician, as it highlights the intricate connections between the nervous system and ocular function.

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