Ataxia means without coordination.
People who are diagnosed with ataxia lose muscle control in their arms and legs which may lead to a lack of balance, coordination, and possibly a disturbance in gait. Ataxia may affect the fingers, hands, arms, legs, body, speech, and even eye movements.
Ataxia is often used to describe the symptom of incoordination that may accompany infections, injuries, other diseases, and/or degenerative changes in the central nervous system. The symptom of ataxia can be caused by stroke, multiple sclerosis, tumors, alcoholism, peropheral neuropathy, metabolic disorders, and vitamin deficiencies. in these cases, treating the condition that caused ataxia my improve it.
While the term ataxia usually describes symptoms, it also describes a group of specific degenerative diseases of the central nervous system called the hereditary and sporadic ataxias. The remainder of this article discusses these disorders.
Most disorders that result in ataxia are found to have degeneration, or atrophy, of the cells in the part of the brain called the cerebellum. The cerebellum is located at the back of the head. Its function is to coordinate voluntary muscle movements and to maintain posture, balance, and equilibrium.
The spine can also be affected. The terms cerebellar degeneration and spinocerebellar degeneration may be used to refer to this type of damage to the nervous system.
The various abnormal genes that cause ataxia do have something in common: they make abnormal proteins that affect nerve cells, primarily in the cerebellum and in the spinal cord. They may also affect other parts of the brain.
The affected nerve cells begin to function poorly and ultimately degenerate. As the disease progresses, muscles become less and less responsive to the commands of the brain. This causes balance and coordination to become a greater problem.
As discussed above, there are two types of ataxia:
Symptoms and time of onset may vary according to the type of ataxia. Each individual may experience symptoms differently.
Typically the most common are listed below:
The symptoms of ataxia may resemble other conditions or medical problems. Always consult your doctor for a diagnosis.
In addition to a thorough medical history, family history, and complete neurological and physical examination, the following diagnostic procedures may be performed:
These diagnostic procedures may also be used to rule out other conditions that can cause ataxia to appear. Certain conditions can cause ataxia to appear suddenly, such as head trauma, stroke, brain hemorrhage, brain tumor, congenital abnormalities, infections, post exposure to certain drugs, and also following cardiac or respiratory arrests.
Some conditions can cause ataxia to appear gradually, such as hypothyroidism, deficiencies of certain vitamins such as B-12 or vitamin E, exposure to certain drugs, multiple sclerosis, syphilis, and other disorders.
At this time there is no cure for the hereditary ataxias. There is also no medication currently available which treats the specific symptom of ataxia.
If ataxia is due to a stroke, a low vitamin level, or exposure to a toxic drug or chemical, then treatment is aimed at treating those specific conditions.
The treatment for the incoordination or imbalance mostly involves the use of adaptive devices to allow the individual to maintain as much independence as possible. Such devices may include the use of a cane, crutches, walker, or wheelchair. Physical therapy, speech therapy, and medications to help symptoms, such as tremor, stiffness, depression, spasticity, and sleep disorders, may also be beneficial.
Research is being conducted on cerebellar and spinocerebellar degeneration, including work aimed at finding the cause(s) of ataxias and ways to treat, cure, and ultimately prevent them, according to the National Institute of Neurological Disorders and Stroke.
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Online Resources of Nervous System Disorders