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Bell Palsy — NDEB AFK MCQ

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EasyBiomedical SciencesBell PalsyNDEB AFK

A 45-year-old patient presents with unilateral facial paralysis affecting the forehead, eye closure, and mouth. Which nerve is most likely affected?

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Correct answer: E — Facial nerve (CN VII)

Complete unilateral facial paralysis affecting the forehead (frontalis), orbicularis oculi, and orbicularis oris indicates a lower motor neuron lesion of CN VII (Bell palsy). An upper motor neuron lesion would spare the forehead due to bilateral cortical innervation of the upper face. CN V is sensory to the face and motor to muscles of mastication.

Reference: Netter – Atlas of Human Anatomy, 7th ed., 2019