Question
What is the correct nerve supply to the muscles labelled as A and B?
| A. |
A – Facial nerve, B – Nerve to mylohyoid
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| B. |
A – Facial nerve, B – Spinal accessory nerve
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| C. |
A – Mandibular, B – Facial nerve
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| D. |
A – Spinal accessory, B – Mandibular nerve
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Show Answer
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Correct Answer � A
Explanation
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The muscle labeled A is the posterior belly of the digastric muscle, and it is supplied by the facial nerve (cranial nerve VII).
The muscle labeled B is the anterior belly of the digastric muscle, and it is supplied by the nerve to mylohyoid (a branch of the mandibular nerve, V3 of the trigeminal nerve).
