Parkinson Disease (PD) is a complex neurodegenerative disease with no known cure. Pharmaceuticals and surgery are options for patients with PD wanting to reduce or alleviate the symptoms. While PD symptoms can vary from person to person, they may include Tremors These usually begin in a limb and your hand may tremble when it's at rest. Rigid muscles Muscle rigidity may occur in any part of your body, limiting your range of movement and becoming quite painful. Impaired posture