| instep | The arch, or highest part of the dorsum of the foot. See: tarsus. (05 Mar 2000) |
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| Mendel's instep reflex | The foot being firmly supported on its inner side, a sharp tap on the dorsal tendons causes extension of the second to the fifth toes. Synonym: back of foot reflex, dorsum of foot reflex. (05 Mar 2000) |
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