Babinski's reflex

Injury	Disease	Nutrition	Poison

Symptoms	Surgery	Test	Special Topic

Overview

Treatment

Babinski's reflex

Definition:

Babinski's reflex occurs when the great toe flexes toward the top of the foot and the other toes fan out after the sole of the foot has been firmly stroked. This is normal in younger children, but abnormal after the age of 2.

Alternative Names:

Reflex - Babinski's; Extensor plantar reflex

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 under 2 years old, but it disappears as the child ages and the nervous system becomes more developed.

In people more than 2 years old, the presence of a Babinski's reflex indicates damage to the nerve paths connecting the spinal cord and the brain (the corticospinal tract). Because this tract is right-sided and left-sided, 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:

Generalized tonic-clonic seizure (there may be a temporary Babinski's reflex for a short time after a seizure)
Amyotrophic lateral sclerosis
Brain tumor (if it occurs in the corticospinal tract or the cerebellum)
Familial periodic paralysis
Friedreich's ataxia
Head injury
Hepatic encephalopathy
Meningitis
Multiple sclerosis
Pernicious anemia
Poliomyelitis (some forms)
Rabies
Spinal cord injury
Spinal cord tumor
Stroke
Syringomyelia
Tuberculosis (when it affects the spine)

Review Date: 2/15/2005
Reviewed By: Luc Jasmin, MD, PhD, Departments of Anatomy & Neurological Surgery, University of California, San Francisco, CA. Review provided by VeriMed Healthcare Network.

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