Bing's sign or Bing's reflex is a clinical sign in which pricking the dorsum of the foot or toe with a pin causes extension of the great toe. It is seen in patients with pyramidal tract lesions of the lower limbs.
This sign is named after Paul Robert Bing.
- Barry G. Firkin, Judith A. Whitworth. Dictionary of Medical Eponyms. Informa Health Care, 2001, page 35. ISBN 978-1-85070-333-4.
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