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Definition:

Babinski's reflex occurs when the big toe moves toward the top of the foot and the other toes fan out after the sole of the foot has been firmly stroked.

This reflex, or sign, is normal in younger children, but abnormal after the age of 2.



Alternative Names:

Reflex - Babinski's; Extensor plantar reflex; Babinski's sign



Considerations:

Reflexes are specific, predictable, involuntary responses to a particular type of stimulation.

Babinski's reflex is one of the infantile reflexes. It is normal in children up to 2 years old, but it disappears as the child ages and the nervous system becomes more developed. It may disappear as early as 12 months.

The presence of a Babinski's reflex after age 2 is a sign of damage to the nerve paths connecting the spinal cord and the brain (the corticospinal tract). This tract runs down both sides of the spinal cord, therefore a Babinski's reflex can occur on one side or on both sides.

An abnormal Babinski's reflex can be temporary or permanent.



Common Causes:

Home Care:

Typically, a person (older than an infant) who has a Babinski's reflex will also have incoordination , weakness , and difficulty with muscle control. Safety is important to prevent the risk of injury. The person may need assistance with activity, and the environment should be kept free of hazards.



Call your health care provider if:

This finding is usually discovered by the health care provider, and the affected person usually is not aware of its presence.



What to expect at your health care provider's office:

The health care provider will perform a physical exam and ask questions about the patient's symptoms and medical history.

The physical examination will include a complete nervous system (neurological) examination.

Diagnostic testing may include:



References:

Griggs R, Jozefowicz R, Aminoff M. Approach to the patient with neurologic disease. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 418.

Hammerstad J. Strength and reflexes. In: Goetz, CG, ed. Textbook of Clinical Neurology. 3rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 15.




Review Date: 3/26/2009
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; Daniel B. Hoch, PhD, MD, Assistant Professor of Neurology, Harvard Medical School, Department of Neurology, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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