Which of the following is not a branch of CN VII?

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Prepare for the NBEO Ocular Anatomy Posterior Segment and Cranial Nerves Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

Which of the following is not a branch of CN VII?

Explanation:
The thing being tested is the source of motor branches to facial muscles. CN VII, the facial nerve, gives off five main terminal branches that innervate muscles of facial expression: temporal, zygomatic, buccal, mandibular, and cervical. The ophthalmic nerve, however, is a division of CN V1 (the trigeminal nerve) and is purely sensory, supplying sensation to the forehead, scalp, and upper eyelid rather than any facial muscles. Because the ophthalmic nerve does not arise from CN VII and does not innervate facial muscles, it is not a branch of CN VII. The other options are indeed branches of CN VII and serve facial muscles in their respective regions.

The thing being tested is the source of motor branches to facial muscles. CN VII, the facial nerve, gives off five main terminal branches that innervate muscles of facial expression: temporal, zygomatic, buccal, mandibular, and cervical. The ophthalmic nerve, however, is a division of CN V1 (the trigeminal nerve) and is purely sensory, supplying sensation to the forehead, scalp, and upper eyelid rather than any facial muscles. Because the ophthalmic nerve does not arise from CN VII and does not innervate facial muscles, it is not a branch of CN VII. The other options are indeed branches of CN VII and serve facial muscles in their respective regions.

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