Right Elbow Atlas

BodyParts3D bones. Start in tennis-elbow view, then try Push-up versus Throwing.

Educational only

Live reading

Extensor carpi radialis brevis

The usual tennis-elbow tendon. It takes origin on the anterior face of the lateral epicondyle, deep in the common extensor. Wrist extension, gripping and a pronated push-up load this origin. At this pose (26° flexion, pronation 42°), the elbow is near extension, so the origin is relatively taut, and pronation rolls the common extensor origin against the RCL. A sharp twang on the bony bump on the outside of the elbow with pushing or gripping is the classic tennis-elbow address — still not a diagnosis.

Why the twang

Lateral. Common extensor origin (ECRB) is under the kind of load people feel as an outside twang — push-ups, gripping, a tennis backhand.

Medial. Medial collateral is not in its throwing-valgus window. Open the Throwing preset to load it.

Load these poses

Educational anatomy only — not a diagnosis, not medical advice. Tennis elbow is a clinical call. Bones are BodyParts3D 4.0 adult-male right arm (CC BY 4.0, Database Center for Life Science). Ligaments, tendons and cartilage are kinematic overlays registered to those meshes. Elbow motions are flexion/extension, pronation/supination and valgus/varus — not ankle terms.

Flexion / extension26° flexion

ExtensionFlexion

Pronation / supination42° pronation

PronationSupination

Valgus / varus0°

VarusValgus

Wrist extension0°

FlexionExtension

Drag to orbit · scroll to zoom · two-finger drag to pan. Wrist extension is here because tennis elbow is an extensor-origin problem — push-ups load it hard.