Parkinson's disease is a "progressive disorder of the nervous system," according to the Mayo Clinic, that primarily affects a patient's movement. It often starts with a small tremor in the hand or muscle stiffness and gets worse over time. There is no test for Parkinson's, so it is occasionally misdiagnosed.
Parkinson's patients often have trouble walking and talking. Symptoms include slowness of movement, a loss of balance and slurred speech. With Parkinson's disease, "you may have a decreased ability to perform unconscious movements, including blinking, smiling or swinging your arms when you walk," th...
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