Ophthalmology Quiz: Argyll Robertson Pupil and Midbrain Lesion
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Questions and Answers

What is the result of an injury to the dorsal tegmentum in the midbrain?

  • Disruption of the fibers from the pretectal nucleus to the parasympathetic third nerve nucleus (correct)
  • Injury to the ventral tegmentum
  • Lesion to the Edinger-Westphal nucleus
  • Damage to the parasympathetic third nerve nucleus

    • What is the characteristic of an Argyll Robertson pupil?

  • It is not affected by light or near response
  • It responds normally to light but not to near response
  • It shows a poor direct and consensual response but does constrict with near response (correct)
  • It does not constrict with near response

    • What is the term for the phenomenon of the pupil constricting with near response but not responding to light?

  • Pupil constriction syndrome
  • Near-light dissociation
  • Optic nerve damage
  • Light-near dissociation (correct)

    • Which nucleus is affected on one side, causing an Argyll Robertson pupil?

    <p>Edinger-Westphal nucleus</p> Signup and view all the answers

    Where do the fibers pass through that are responsible for the near response in an Argyll Robertson pupil?

    <p>Ventral tegmentum</p> Signup and view all the answers

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