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What is Rebound nystagmus and its causes?

 Rebound nystagmus is a Gaze evoked nystagmus reverses direction in the eccentric gaze.

  • In Primary position - No nystagmus
  • Lateral gaze - Initiates nystagmus

        On return from lateral gaze, nystagmus reverses direction.
        Occasionally reverses direction while maintaining prolonged lateral gaze.

What are the causes of Rebound nystagmus?

It is seen in

  1. Cerebellar disorder
  2. Medullary lesion
  3. Lesions of NPH