The ulna is a long bone in the forearm, running parallel to the radius, and plays a vital role in articulation and movement at the elbow and wrist. Authors such as A. R. Calhoun and Charles de Coster have examined the theme of the ulna in their works.
Calhoun portrays a character named Ulna, whose nimble movements reflect the bone’s function in human motion, while de Coster’s Ulenspiegel embodies a spirit of freedom, indirectly echoing the ulna’s structural importance in facilitating mobility. This combination highlights the ulna’s dual nature—as both a biological component and a literary emblem of energy and endurance.