Causes
By Mayo Clinic staffDoctors don't know exactly what causes most cases of dystonia, but a few factors may be involved.
Altered nerve cell communication
Dystonia has been linked to altered communication between nerve cells located in the basal ganglia — an area of the brain involved in initiating muscle contractions.
Genetic changes
Researchers have also discovered a number of genetic changes associated with certain inherited forms of dystonia and also with other forms of dystonia. However, most cases of adult-onset focal dystonias have not been linked to genes.
Other disorders
Sometimes dystonia is but one symptom of a more pervasive disorder that affects the basal ganglia, such as:
- Parkinson's disease
- Huntington's disease
- Traumatic brain injury
- Stroke
- Brain tumor
- Oxygen deprivation
- Infections, such as tuberculosis or encephalitis
- Reactions to certain drugs
- Heavy metal or carbon monoxide poisoning
- Dystonias fact sheet. National Institute of Neurological Disorders and Stroke. http://www.ninds.nih.gov/disorders/dystonias/detail_dystonias.htm. Accessed Jan. 21, 2010.
- Tarsy D, et al. Dystonia. New England Journal of Medicine. 2006;355:818.
- Comella C. Treatment of dystonia. http://www.uptodate.com/home/index.html. Accessed Jan. 18, 2010.
- Schwarz CS, et al. Genetics and treatment of dystonia. Neurologic Clinics. 2009;27:697.
- Dystonias. The Merck Manuals: The Merck Manual for Healthcare Professionals. http://www.merck.com/mmpe/print/sec16/ch221/ch221c.html. Accessed Jan. 21, 2010.
- Ropper AH, et al. Abnormalities of movement and posture caused by disease of the basal ganglia. In: Ropper AH, et al. Adams and Victor's Principles of Neurology. 9th ed. New York, N.Y.: McGraw-Hill Medical; 2009. http://www.accessmedicine.com/content.aspx?aID=3630437. Accessed Jan. 21, 2010.
- Complementary therapy. Dystonia Medical Research Foundation. http://www.dystonia-foundation.org/pages/complementary_therapy/156.php. Accessed Jan. 22, 2010.
- Ahlskog EJ (expert opinion). Mayo Clinic, Rochester, Minn. Jan. 27, 2010.

Find Mayo Clinic on