Much has been published already about the facial wrinkles in psp ncbi.nlm.nih.gov/pubmed/208...
and how it can be a early diagnostic tool. MSA and Parkinson's does not feature the same type of wrinkles. The wrinkles form a triangle just above the nose and also form several lines on the forehead like you get when you squint to focus/see something. My question is- Does it also form crows feet wrinkles on the outside of the eyes?