Oppenheim's sign is
dorsiflexion of the
great toe elicited by irritation downward of the medial side of the
tibia
The tibia (; ), also known as the shinbone or shankbone, is the larger, stronger, and anterior (frontal) of the two bones in the leg below the knee in vertebrates (the other being the fibula, behind and to the outside of the tibia); it connects ...
.
It is one of a number of
Babinski-like responses.The sign's presence indicates a damage to the
pyramidal tract.
It is named for
Hermann Oppenheim.
[H. Oppenheim. Zur Pathologie der Hautreflexe der unteren Extremitäten. Monatsschrift für Psychiatrie und Neurologie, 1902, 12: 421-423.]
Refer
Symptoms and signs: Nervous system
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