Parkinson’s disease (PD) is a progressive disorder of the nervous system. It primarily affects movement but can also lead to other symptoms, significantly impacting quality of life over time. Signs of PD start slow but become more frequent and intense as the disease progresses. It's important for both patient and caregiver to know the stages of PD and how it progresses in order to know what to expect and how to plan for any necessary lifestyle changes before symptoms worsen. But PD and its...