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| [00:04.57]A new American study shows that chemicals used to kill insects in the home may increase the risk of developing Parkinson's disease. [00:17.14]Earlier studies have shown that people who work around pesticides are at greater risk of developing the disease. [00:26.25]But scientists say the latest study is the first to link the'disease to the use of pesticides in the home. [00:35.42]Parkinson's is a disease of the central nervous system. [00:40.88]It causes the loss of a chemical in the brain called dopamine. [00:46.68]As the disease progresses, it causes the muscles to become hard and difficult to move. [00:54.23]It also causes the arms and legs to shake. [00:58.70]Scientists at Stanford University in California studied about 500 people from northern California who have Parkinson's disease. [01:11.47]The people were asked detailed questions about past use of pesticides and other chemicals in their homes or outdoor gardens. [01:22.52]This information from the Parkinson's patients was compared with information from more than 500 people who did not have the disease. [01:34.09]Researchers found that the people who were exposed to pesticides [01:39.68]were more than two times as likely to develop Parkinson's disease as those who were not exposed to the chemicals. [01:48.96]Scientists say exposure to pesticides in the home was linked to the highest risk of developing the disease. [01:58.88]People who used pesticides in their outdoor gardens were not found to be at greater risk for Parkinson's. [02:08.16]It is not clear why pesticides may increase the risk of Parkinson's disease. [02:15.55]Scientists say some chemical compounds may target and kill cells in some parts of the brain. [02:24.69]Damage to nerve cells in a part of the brain called the substantia nigra leads to signs of Parkinson's disease. [02:34.31]Lorene Nelson is the leading researcher of the Study. [02:40.68]She presented the findings earlier this month at the yearly meeting of the American Academy of Neurobiology in San Diego,California. [02:51.08]She says chemicals in the environment may cause the death of some brain cells. [02:59.04]But she says it is too early to suggest that people change their use of pesticides. [03:06.85]Ms Nelson says more studies are needed before scientists can know for sure what causes Parkinson's disease. |
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