Prominent midbrain atrophy with no pontine atrophy in PSP patients has been referred to as “hummingbird” or “penguin” sign.
Progressive supranuclear palsy, also called Steele-Richardson-Olszewski syndrome, is an uncommon brain disorder that causes serious problems with walking, balance and eye movements. The disorder results from deterioration of cells in areas of your brain that control body movement and thinking.
Progressive supranuclear palsy worsens over time and can lead to life-threatening complications, such as pneumonia and swallowing problems. There’s no cure for progressive supranuclear palsy.