Question

Nerve supply of the extraocular muscles is constituted by all except

• A. Ophthalmic nerve
• B. Oculomotor nerve
• C. Trochlear nerve
• D. Abducent nerve

Answer 1

The Correct Option is A

The question pertains to the nerve supply of the extraocular muscles, which are responsible for controlling eye movements. Let's review each nerve mentioned:

1. Oculomotor nerve (Cranial Nerve III): This nerve innervates the majority of the extraocular muscles, including the superior rectus, inferior rectus, medial rectus, inferior oblique, and the levator palpebrae superioris.
2. Trochlear nerve (Cranial Nerve IV): This nerve supplies the superior oblique muscle, which is one of the extraocular muscles.
3. Abducent nerve (Cranial Nerve VI): This nerve innervates the lateral rectus muscle, responsible for abducting the eye.
4. Ophthalmic nerve (Cranial Nerve V1): This is a branch of the trigeminal nerve and provides sensory innervation to the forehead, upper eyelid, and nose. It does not supply any of the extraocular muscles.

Based on the above information, the ophthalmic nerve does not contribute to the motor innervation of the extraocular muscles, making it the option that does not fit the criteria.