Difficulty with Fine Motor Skills
This is probably the symptom that is most commonly associated with Parkinson’s disease. PD causes tremors due to the loss of dopamine-producing neurons in the brain, specifically in an area called the substantia nigra. Dopamine is a chemical messenger that helps regulate movement and coordination, and when there is a lack of dopamine, it leads to abnormal activity in the part of the brain that controls movement. This abnormal activity can result in the tremors and other movement problems that are characteristic of Parkinson’s disease. The tremors in Parkinson’s usually start in one hand or arm and can spread to other parts of the body over time. While not all people with Parkinson’s experience tremors, they are a common symptom of the disease.