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Lower Limb Neuro

Babinski Sign

February 15th, 2021


  • How to Elicit

  • Slowly run a key up the lateral aspect of the sole of the foot, from the heel to the base of the toe. Look for movement of the great toe.
Alternatively, run a key up the lateral aspect of the foot.
  • Abnormal If

  • The reflexive movement of the great toe is upgoing (extensor) rather than downgoing.
  • Significance

  • A positive Babinski sign denotes pathology within the pyramidal system, indicative of an upper motor neuron lesion.
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