Babinski's reflex
Alternative names:
extensor plantar reflex; reflex - Babinski's
Definition:
A reflex where the great toe flexes toward the top of the foot and the other toes fan out when the sole of the foot is firmly stroked; normal in children but abnormal after about 2 years old.
Considerations:
Reflexes are specific, predictable, involuntary responses to a particular type of stimulation.
The Babinski's reflex is one of the infantile reflexes; it is normal in children under 2 years old but 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- 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:
Note: There may be other causes of an abnormal Babinski's reflex. This list is not all inclusive, and the causes are not presented in order of likelihood. The causes of this symptom can include unlikely diseases and medications. Furthermore, the causes may vary based on age and gender of the affected person, as well as on the specific characteristics of the symptom such as time course, aggravating factors, relieving factors, and associated complaints. Use the Symptom Analysis option to explore the possible explanations for an abnormal Babinski's reflex, occurring alone or in combination with other problems.
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