Neuroanatomy basics · USMLE Step 1

A lesion of the facial colliculus results in facial paralysis and impaired lateral gaze. Which cranial nerves are involved?

  1. CN VI and CN VII
  2. CN IV and CN VII
  3. CN III and CN IV
  4. CN IX and CN X
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Correct answer: CN VI and CN VII

The facial colliculus contains the abducens nucleus and fibers of the facial nerve. Lesions impair lateral gaze and facial movement.

Difficulty: Medium Question 16 of 20

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