Parkinson's disease is a progressive disorder of the central nervous system that affects movement, muscle control, and balance. It is part of a group of conditions known as motor systems disorders. Parkinson's disease was named for James Parkinson, a general practitioner in London during the 19th century who first described the symptoms of the disease. Symptoms describing Parkinson's disease are mentioned in the writings of medicine in India dating back to 5000 BC as well as in Chinese writings dating back approximately 2500 years.
The hallmark symptoms of Parkinson's disease are asymmetric tremors at rest (tremors affecting a limb on one side of the body), rigidity, and bradykinesia (slowness in movement). There is currently no cure for Parkinson's disease; it is always chronic and progressive, meaning that the symptoms always worsen over time. The rate of progression varies from person to person as does the intensity of the symptoms. Parkinson's disease itself is not a fatal disease and many people live into their older years. Mortality of Parkinson's disease patients is usually related to secondary complications, such as pneumonia or falling.
According to the American Parkinson's Disease Association, there are approximately 1.5 million people in the U.S. who suffer from Parkinson's disease which is approximately 1% of the people over the age of 60. Approximately 50,000 new cases are diagnosed annually. That number is expected to rise as the general population in the U.S. ages. Onset of Parkinson's disease before the age of 40 is rare. All races and ethnic groups are affected.
There are three types of Parkinson's disease grouped by age of onset:
· Adult Onset Parkinson's Disease - This is the most common type of Parkinson's disease in which the average age of onset is approximately 60 years of age. The incidence rises noticeably as people advance in age into their 70's and 80's.
· Young Onset Parkinson's Disease - The age of onset is between 21-40 years of age. Though the incidence of Young Onset Parkinson's Disease is very high in Japan (approximately 40% of cases diagnosed with Parkinson's disease), it is still relatively uncommon in the U.S., with estimates ranging from 5-10% of cases diagnosed.
· Juvenile Parkinson's Disease - The age of onset is before the age of 21. The incidence of Juvenile Parkinson's Disease is very rare. Parkinson's disease can significantly impair quality of life not only for the patient but for their family as well, especially the primary caregiver. It is therefore important for caregivers and family members to educate themselves and become familiar with the course of Parkinson's disease and the progression of symptoms so that they can be actively involved in communication with health care providers and in understanding all decisions regarding treatment of the patient.
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Parkinson's condition is a modern disorder of the main nervous system that impacts movement, muscular manage, and stability. It is part of a team of situations known as motor devices conditions.
eye diseases and conditions
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