chrome_imgPreload('gifChr_mid_but_home_mo_1','http://img.intelihealth.com/i/C/Chr_mid_but_home-o.gif'); chrome_imgPreload('gifChr_mid_but_comm_mo_2','http://img.intelihealth.com/i/C/Chr_mid_but_comm-o.gif'); chrome_imgPreload('gifChr_mid_but_dental_mo_3','http://img.intelihealth.com/i/C/Chr_mid_but_dental-o.gif'); chrome_imgPreload('gifChr_mid_but_drug_mo_4','http://img.intelihealth.com/i/C/Chr_mid_but_drug-o.gif'); chrome_imgPreload('gifChr_mid_but_askexpert_mo_5','http://img.intelihealth.com/i/C/Chr_mid_but_askexpert-o.gif'); chrome_imgPreload('gifChr_mid_but_medical_mo_6','http://img.intelihealth.com/i/C/Chr_mid_but_medical-o.gif'); chrome_imgPreload('gifChr_mid_but_chats_mo_7','http://img.intelihealth.com/i/C/Chr_mid_but_chats-o.gif'); chrome_imgPreload('gifchr_mid_but_news_mo_8','http://img.intelihealth.com/i/c/chr_mid_but_news-o.gif'); chrome_imgPreload('gifChr_mid_but_privacy_mo_9','http://img.intelihealth.com/i/C/Chr_mid_but_privacy-o.gif'); Advertisement Parkinson's Disease What Is It? Symptoms Diagnosis Expected Duration ... Additional Info What Is It? Parkinson's disease is a disease of the central nervous system that causes problems with body motions, including tremor (shakiness), rigidity (muscle stiffness), slowed body movements, unstable posture and difficulty walking. It happens when nerve cells (neurons) in a part of the brain called the substantia nigra gradually die. These cells normally produce dopamine, a chemical that helps to relay messages between areas of the brain that control body movement. The death of cells in this area of the brain leads to abnormally low levels of dopamine, which makes it difficult for a person with Parkinson's disease to control muscle tension and muscle movement, both at rest and during periods of activity. | |
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