Parkinson’s Disease (“PD”) is a progressive disorder of the nervous system that affects movement. It develops gradually, sometimes starting with a barely noticeable tremor in just one hand. Symptoms include tremors, slowed movement, rigid muscles, impaired posture and balance, loss of automatic movements, speech changes, and writing changes.
In PD, certain nerve cells in the brain gradually break down or die. Many of the symptoms are due to a loss of neurons that produce a chemical messenger in your brain called dopamine. When dopamine levels decrease, it causes abnormal brain activity.
Although PD can’t be cured, medications may markedly improve your symptoms. In occasional cases, your doctor may suggest surgery to regulate certain regions of your brain and improve your symptoms.
Parkinson’s Disease, Mayo Clinic (July 7, 2015), https://www.mayoclinic.org/diseases-conditions/parkinsons-disease/symptoms-causes/syc-20376055.