40, it is 0.4%. The disease can also occur in childhood or adolescence. 50%~80% of cases have an insidious onset, and the first symptom is usually a 4~8Hz static "pill-twisting" tremor in one hand. Speech disorders are common symptoms of Parkinson's patients.">Parkinson's disease, also known as "tremor palsy", Parkinson's disease or Parkinson's disease, usually occurs after the age of 60. The main manifestations are slow movements, tremors in the hands, feet or other parts of the body, loss of body flexibility and stiffness. The first person to systematically describe the disease was James Parkinson, a British physician. At that time, it was not known which category the disease should be classified into, and the disease was called tremor palsy. Parkinson's disease is the fourth most common neurodegenerative disease in the elderly. Among people aged 65, 1% suffer from this disease; among people aged >40, it is 0.4%. The disease can also occur in childhood or adolescence. 50%~80% of cases have an insidious onset, and the first symptom is usually a 4~8Hz static "pill-twisting" tremor in one hand. Speech disorders are common symptoms of Parkinson's patients.