"Penguin" or "hummingbird" sign and midbrain atrophy in progressive supranuclear palsy
"Penguin" or "hummingbird" sign and midbrain atrophy in progressive supranuclear palsy
Midsagittal MRI of the brain demonstrates prominent midbrain atrophy without pontine atrophy (divided by white line), forming the silhouette of the "penguin" or "hummingbird" sign.
