The postulnar bone, also known as the ulna, is a key component of the skeletal structure of the human forearm. This long bone runs parallel to the radius, with both bones connecting the elbow joint to the wrist. The ulna is often referred to as the postulnar bone due to its position on the inner side of the forearm. Synonyms for the postulnar bone include the ulnar bone, the medial bone of the forearm, and the cubitus bone. Understanding the synonyms for this bone aids in clear communication among medical professionals and helps individuals gain a comprehensive understanding of the human anatomy.