1- A 38-year-old woman says that she is “dizzy.” A more careful history reveals that she has an abnormal sensation of movement intermittently.Examination reveals horizontal rhythmic eye movements on leftward gaze.A T1 MRI image from this patient is shown. Electronystagmography is most likely to support which of the following diagnoses?

  1. Ocular bobbing
  2. Pontine hemorrhage
  3. Cervicomedullary junction glioma
  4. Episodic vertigo
  5. Brainstem stroke

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