Anatomy, Shoulder and Upper Limb, Forearm Ulna

Excerpt

The ulna is one of the two forearm long bones that, in conjunction with the radius, make up the antebrachium. The bone spans from the elbow to the wrist on the medial side of the forearm when in anatomical position. In comparison to the radius, the ulna is described to be larger and longer. It serves as the origin and/or insertion site for more than a dozen muscles and is involved in motions assisted by the elbow and the wrist joints. Common pathologies are also associated with the bone as several fractures are pathognomonic depending on the location within the ulna, as well as the resulting position of the fractured segments.