anatomy/clavicle·Bone
Clavicle
Clavicula
The S-shaped bone between sternum and shoulder. It is the only bony link between the arm and the trunk.
// Structure & location
The collarbone lies horizontally just under the skin and can be felt along its whole length. On the inside it forms a joint with the sternum, on the outside with the acromion of the shoulder blade (AC joint). Together with the scapula it forms the shoulder girdle, which according to OpenStax attaches the arm to the trunk.
// Function
It acts like a strut that holds the shoulder out from the trunk so the arm can swing freely. At the same time it transmits forces from the arm to the trunk. Parts of the pectoral, deltoid and trapezius muscles arise from it.
// For training & sport
- In falls on the shoulder or an outstretched arm, for example when cycling, the collarbone is especially at risk.
- An AC joint separation often results from falling directly onto the shoulder.
// Good to know
The collarbone is one of the most frequently broken bones. The fracture usually heals well, often without surgery.
// Sources
last reviewed: 2026-11-14