Memory loss is not a symptom of Parkinson's disease, according to Mayo Clinic. Parkinson's disease primarily affects a person's movement, as it is a progressive disease of the nervous system.
Common symptoms of Parkinson's disease include tremors of the hands or fingers, slowed movement or rigid muscles, explains Mayo Clinic. Symptoms usually begin on one side of the body and slowly move to the next, although symptoms remain worse on the side from which the disease originated. For many people, early symptoms are very mild and go unnoticed for some time. As of 2015, there is no cure for Parkinson's disease, as stated by WebMD. However, Mayo Clinic states that symptoms can be treated with drugs that either contain dopamine or increase the amount of dopamine a patient's body produces.