🏥 USMLE Exam Prep

A patient presents with left-sided facial droop, inability to close the left eye, and loss of taste sensation on the anterior two-thirds of the tongue. Which cranial nerve is most likely affected?

A Trigeminal nerve (CN V)
B Facial nerve (CN VII)
C Glossopharyngeal nerve (CN IX)
D Hypoglossal nerve (CN XII)

✓ Correct Answer: Option B

The facial nerve (CN VII) controls muscles of facial expression (facial droop, inability to close eye), innervates the lacrimal and salivary glands, and carries taste sensation from the anterior two-thirds of the tongue.

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