Kinetix Rehab on Instagram: "1. What is Parkinson’s Disease? Parkinson’s disease (PD) is a progressive neurodegenerative disorder of the nervous system that primarily affects movement control. It occurs due to the loss of dopamine-producing neurons in a part of the brain called the substantia nigra, which leads to abnormal brain signaling and motor dysfunction. In research and clinical reviews, PD is described as: a movement disorder characterized by gradually worsening motor symptoms; caused by