Ulna

Description

Presented in a posterior, anatomic stance, the female skeleton is shown with both ulnae highlighted along the medial (ulnar) side of the forearms, running from the olecranon and trochlear notch proximally to the ulnar head and styloid process distally. Each ulna lies medial to the radius in standard anatomical position, forming the bony margin of the forearm that is closest to the trunk, while the humerus, scapulae, and vertebral column provide proximal and midline context. Distally, the ulna sits medial to the distal radius at the distal radioulnar joint, just proximal to the carpal bones. Orientation is unmistakable. For teaching, this posterior emphasis works well because the olecranon process and proximal ulna read as palpable, posterior landmarks at the elbow, helping learners map the trochlear notch to the humeral trochlea and understand why elbow extension injuries often involve the olecranon. Clinically, the ulna is central to fracture pattern recognition: Monteggia lesions pair ulnar shaft fracture with radial head dislocation, and distal ulna injuries can destabilize the distal radioulnar joint and the triangular fibrocartilage complex, altering forearm pronation and supination. The full-body context keeps the forearm from becoming an isolated diagram, which supports side-to-side comparison and laterality checks. Use this asset in upper limb anatomy labs, orthopedic teaching files, and patient-facing materials that need a clear location cue for ulnar-sided forearm pain, ulnar styloid fractures, or postoperative plating along the subcutaneous border of the ulna. It also suits textbooks and slide decks that introduce skeletal terminology before moving into radiographs or cross-sectional imaging. Anatomical accuracy verified by SciePro's Medical Advisory Board.