What is the definition or description of: progressive supranuclear palsy?

PSP: This is a condition that is similar to Parkinson's disease but the rigidity is more through the trunk than in the limbs, and people have difficulty moving their eyes. It is also more aggressive than Parkinson's disease with rare benefit with medications and rapid progression.

Progressive Supranuclear Palsy is an atypical parkinsonian syndrome. An uncommon neurological disorder that can affect eye movements, muscle tone, gait, balance, speech, swallowing, vision, mood, behavior, and cognition. Attributed to abnormal tau (protein) accumulation and neuronal loss in various brain regions. Consider neurology and sub-specialist neurologist expertise movement disorders