Parkinson, warning sign

Patients with PSP often have the “procerus sign” which is a particularly “worried” facial expression. The second most common form of atypical parkinsonism is multiple system atrophy (MSA – a ...
And for some, one of the earliest sign of Parkinson's is a less of smell, or anosmia. The NHS has indicated that this symptom "sometimes occurs several years before other symptoms develop ...