Generally, to begin, Parkinson's disease is a brain disorder that leads to shaking, stiffness, and difficulty with walking, balance, and coordination. Parkinson's symptoms usually begin gradually and get worse over time. As the disease progresses, people may have difficulty walking and talking. They may also have mental and behavioral changes, sleep problems, depression, memory difficulties, and fatigue.

Scientists have not yet found the cause of PD. Nonetheless, they have developed a deep range of knowledge about the disease and how to manage it. Currently, medical science recognizes two basic forms of PD, idiopathic Parkinson's disease and the so-called Parkinson's Plus syndrome's.