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Supranuclear gaze palsy and hummingbird sign
  1. Mohammad Rohani,
  2. Mostafa Almasi
  1. Neurology Department, Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
  1. Correspondence to Dr Mostafa Almasi, Neurology Department, Rasoul Akram Hospital, Niayesh St, Sattar-Khan St, Tehran 1445613131, Iran; A_mostafa108{at}

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Progressive supranuclear palsy (PSP) is a neurodegenerative disease caused by tau protein accumulation. It is also classified as an atypical parkinsonian syndrome. The main features of PSP are recurrent falling and vertical gaze palsy. Other manifestations are bradykinesia, cognitive dysfunction, erect posture, dysphagia and …

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