Pronator Teres, Lateral View

Description

Oriented in lateral profile, the forearm skeleton is presented from the distal humerus through the elbow joint to the radius and ulna, continuing to the carpal bones, metacarpals, and phalanges. The anconeus muscle is isolated in red on the posterolateral aspect of the elbow, spanning from the lateral epicondyle of the humerus to the proximal ulna along the lateral margin of the olecranon. From this perspective, its fibers run obliquely distal and medial, lying superficial to the posterolateral capsule and adjacent to the radial head region anteriorly. Clinically, the anconeus is often overlooked, but this lateral view clarifies its relationship to the lateral epicondyle, the proximal ulna, and the elbow capsule, which is exactly what you need when teaching posterolateral elbow anatomy. The muscle can be implicated in posterolateral rotatory instability and lateral elbow pain patterns that mimic extensor tendinopathy, and it is encountered during the Kocher interval approach between anconeus and extensor carpi ulnaris when accessing the radial head. A small muscle. A frequent landmark. Use this artwork in upper limb anatomy teaching for medical or physical therapy curricula, in orthopaedic surgery or sports medicine texts discussing lateral elbow approaches, and in patient-facing education explaining elbow stabilization structures near the radial head and olecranon. Anatomical accuracy verified by SciePro's Medical Advisory Board.