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Vertical ‘half-and-a-half’ syndrome
  1. Rechdi Ahdab,
  2. Naji Riachi
  1. Division of Neurology, University Medical Center Rizk Hospital, Beirut, Lebanon
  1. Correspondence to Dr Rechdi Ahdab, Division of Neurology, University Medical Center Rizk Hospital, Achrafieh, Beirut, Lebanon; chadahdab{at}

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Strokes in the territory of the thalamo-subthalamic paramedian artery cause unilateral damage to the thalamo-mesencephalic junction. They are associated with several types of vertical gaze disorders because they interrupt the descending fibres that serve vertical gaze.1 These strokes classically result in the vertical ‘one-and-a-half’ syndrome2 that associates bilaterally upward with ipsilateral downward gaze palsy. The contralesional monocular elevation palsy represents another vertical gaze disorder previously described.3 ,4 We report a case of a thalamo-mesencephalic stroke that resulted in a …

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  • Competing interests None.

  • Patient consent Obtained.

  • Provenance and peer review Not commissioned; externally peer reviewed.