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Anatomy & Histology · single question

Bell's palsy is characterized by:

  1. Unilateral LMN facial nerve paralysis including the forehead
  2. Unilateral UMN facial palsy with forehead sparing
  3. Contralateral facial droop with arm weakness
  4. Bilateral facial paralysis with forehead sparing
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Correct answer: A. Unilateral LMN facial nerve paralysis including the forehead

Bell's palsy = idiopathic unilateral LMN CN VII palsy. ALL facial muscles ipsilaterally are affected including the forehead (LMN = forehead affected).
  • A. ✅ CORRECT – Bell's palsy: unilateral LMN palsy affecting entire ipsilateral face including forehead.
  • B. ❌ Forehead sparing indicates UMN lesion (stroke); Bell's palsy is LMN.
  • C. ❌ Contralateral droop + arm weakness is a stroke pattern.
  • D. ❌ Bell's palsy is unilateral. Bilateral = Lyme disease or Guillain-Barré.

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