Parkinson’s disease (PD) is a progressive neurological disorder that affects movement and causes tremors, stiffness, and difficulty with coordination and balance. It is caused by the breakdown of neurons in the brain that produce dopamine, a chemical that helps regulate movement. Symptoms may include tremor (trembling in hands, arms, legs, jaw and face), slow movement, rigid muscles, impaired posture and balance, loss of automatic movements and changes in speech. Besides the physical effects, people with PD may also experience depression, memory problems and changes in cognition. Treatment for Parkinson’s disease typically involves a combination of medications, physical and occupational therapy, and lifestyle modifications.