Parkinsonism is any condition that causes a combination of the movement abnormalities seen in Parkinson’s disease — such as tremor, slow movement, impaired speech or muscle stiffness — especially resulting from the loss of dopamine-containing nerve cells (neurons).
A disorder of the central nervous system that affects movement, often including tremors. Nerve cell damage in the brain causes dopamine levels to drop, leading to the symptoms of Parkinson’s. Parkinson’s often starts with a tremor in one hand. Other symptoms are slow movement, stiffness and loss of balance. Medication can help control the symptoms of Parkinson’s.