Friedreich’s Ataxia

Definition

Friedreich’s ataxia is a rare, inherited disease. It causes a gradual breakdown of the nervous system. Friedreich’s ataxia affects nerves in the brain and spinal cord that control movement. It also affects sensory nerves that help with coordination. In later stages, the disease can cause injury to the heart and pancreas.
The Nervous System
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Causes

Friedreich’s ataxia is caused by a problem with a gene called the frataxin gene. This gene is found on chromosome 9q13. To develop this disease, a person must inherit a copy of the defective gene from each parent. However, there are some people with Friedreich’s ataxia that have no family history of the disorder.

Risk Factors

There are no known risk factors other than having a parent with the frataxin gene.

Symptoms

Symptoms can be different for each person. The most common include:
  • Leg weakness, including difficulty walking
  • Loss of coordination
  • Difficulty speaking and swallowing
  • Foot deformities
  • Foot ulcers
  • Hearing loss and/or vision loss
  • Eye movement abnormalities
  • Movement disorders such as tremor, dystonia, and chorea

Diagnosis

Your doctor will ask about your symptoms. You will also be asked about your medical history, family history, and current medication. A physical exam will be done. If Friedrich's ataxia is suspected, you may also see a doctor who specializes in the nervous system.Images may need to be taken of your bodily structures. This can be done with:The function of your muscles and nerves may be tested. This can be done with:The electrical activity of your heart may be assessed. This can be done with:Your bodily fluids and tissues may be tested. This can be done with:
  • Genetic testing for the frataxin gene
  • Blood and urine tests
  • Nerve or muscle biopsy

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