Print friendly version
* Not a rare disease
* Not a rare disease
Other Names for this Disease
- Arnold Chiari malformation
- Arnold-Chiari malformations
See Disclaimer regarding information on this site. Some links on this page may take you to organizations outside of the National Institutes of Health.
cerebellum, the part of the brain that controls balance. When the indented bony space at the lower rear of the skull is smaller than normal, the cerebellum and brainstem can be pushed downward. The resulting pressure on the cerebellum can block the flow of cerebrospinal fluid (the liquid that surrounds and protects the brain and spinal cord) and can cause a range of symptoms including dizziness, muscle weakness, numbness, vision problems, headache, and problems with balance and coordination. Treatment may require surgery. Many patients with the more severe types of Chiari malformations who undergo surgery see a reduction in their symptoms and/or prolonged periods of relative stability, however paralysis is generally permanent despite surgery.Chiari malformations are structural defects in the
There are four types of Chiari malformations. The types tend to correspond with the degree of severity, with type 1 being the most common and least severe. Some people with type 1 have no symptoms and do not require treatment.
Last updated: 4/22/2013
- NINDS Chiari Malformation Information Page. National Institute of Neurological Disorders and Stroke (NINDS). 2007; http://www.ninds.nih.gov/disorders/chiari/chiari.htm. Accessed 4/6/2009.
- The National Institute of Neurological Disorders and Stroke (NINDS) collects and disseminates research information related to neurological disorders. Click on the link to view information on this topic.
In Depth Information
- The Online Mendelian Inheritance in Man (OMIM) database contains genetics resources that discuss Chiari malformations. Click on the link to go to OMIM and review these resources.
- PubMed is a searchable database of medical literature and lists journal articles that discuss Chiari malformations. Click on the link to view a sample search on this topic.