Low levels of
dopamine, a brain chemical involved
in controlling movement, cause symptoms of Parkinson's disease. Low levels happen when nerve cells in a part of the brain that makes dopamine break down. The exact cause of this
breakdown isn't known.
Scientists are looking for links between
Parkinson's disease and genetics,
aging, toxins in the environment, and
free radicals. Although
these studies are beginning to provide some answers, experts don't know the
exact cause of the disease.
It is possible that the main title of the report Parkinson's Disease is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.
Only a small
percentage of people with Parkinson's have a parent, brother, or sister
who has the disease. But abnormal
genes do seem to be a factor in a few families where
early-onset Parkinson's is common.
There are many other causes
of parkinsonism, which is a group of symptoms that includes tremor, muscle
stiffness, slow movement, and unsteady walking. Parkinsonism mimics Parkinson's
disease, but in fact is not Parkinson's disease.
In this article
This information is produced and provided by the National
Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National
Institute via the Internet web site at http://
.gov or call 1-800-4-CANCER.
WebMD Medical Reference from Healthwise
March 12, 2014
This information is not intended to replace the advice of a doctor.
Healthwise disclaims any liability for the decisions you make based on this