Bing's sign or Bing's reflex is a

clinical sign Signs and symptoms are the observed or detectable signs, and experienced symptoms of an illness, injury, or condition. A sign for example may be a higher or lower temperature than normal, raised or lowered blood pressure or an abnormality showin ...

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

upper motor neuron lesion An upper motor neuron lesion (also known as pyramidal insufficiency) Is an injury or abnormality that occurs in the neural pathway above the anterior horn cell of the spinal cord or motor nuclei of the cranial nerves. Conversely, a lower motor ne ...

of the lower limbs.Barry G. Firkin, Judith A. Whitworth. ''Dictionary of Medical Eponyms.'' Informa Health Care, 2001, page 35. . It is one of a number of Babinski-like responses. This sign is named after

Paul Robert Bing Paul Robert Bing (5 May 1878 in Strasbourg – 15 March 1956 in Basel) was a Swiss neurologist remembered for Bing's sign. Biography Robert Bing was born in Strasbourg, now France in 1878. He studied medicine at the University of Basel unti ...

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{{med-sign-stub Symptoms and signs: Nervous system