Acute cerebellar ataxia
Acute cerebellar ataxia is sudden, uncoordinated muscle movement
due to disease or injury to the cerebellum in the brain.
Cerebellar ataxia; Ataxia - acute cerebellar; Cerebellitis; Post-varicella acute cerebellar ataxia; PVACA
Causes, incidence, and risk factors
Acute cerebellar ataxia in children, especially younger than age 3, may occur several weeks after an illness caused by a virus.
Viral infections that may cause this include chickenpox
, Coxsackie disease, Epstein-Barr, and echovirus
Other causes of acute cerebellar ataxia include:
of the cerebellum
Alcohol, medications, and insecticides
Bleeding into the cerebellum
Strokes of the cerebellum
Ataxia may affect movement of the middle part of the body from the neck to the hip area (the trunk) or the arms and legs (limbs).
When the person is sitting, the body may move side-to-side, back-to-front, or both. Then the body quickly moves back to an upright position.
When a person with ataxia of the arms reaches for an object, the hand may sway back and forth.
Common symptoms of ataxia include:
- Clumsy speech pattern (dysarthria
- Repetitive eye movements (nystagmus
- Uncoordinated eye movements
- Walking problems (unsteady gait)
Signs and tests
The doctor will ask if the person has recently been sick and will try to rule out any other causes of the problem. Brain and nervous system examination will be done to identify the areas of the nervous system that are most affected.
The following tests may be ordered:
Treatment depends on the cause:
If the acute cerebellar ataxia is due to bleeding, surgery may be needed.
For a stroke, medication to thin the blood can be given.
Infections may need to be treated with antibiotics or antivirals.
- Steroids may be needed for swelling (inflammation) of the cerebellum (such as from multiple sclerosis)
Cerebellar ataxia caused by a recent viral infection may not need treatment.
People whose condition was caused by a recent viral infection should make a full recovery without treatment in a few months. Strokes, bleeding, or infections may cause permanent symptoms.
Movement or behavioral disorders may (rarely) persist.
Calling your health care provider
Call your health care provider if any symptoms of ataxia appear.
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Subramony SH, Xia G. Disorders of the cerebellum, including the degenerative ataxias. In: Daroff RB, Fenichel GM, Jankovic J, Mazziotta JC. Bradley’s Neurology in Clinical Practice. 6th ed. Philadelphia, PA: Elsevier Saunders; 2012:chap 72.
Luc Jasmin, MD, PhD, Department of Neurosurgery, Cedars Sinai Medical Center, Los Angeles and Department of Anatomy, University of California, San Francisco, CA. Review provided by VeriMed Healthcare Network. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, Bethanne Black, Stephanie Slon, and Nissi Wang.