Interclavicular Ligaments
The clavicle (collarbone) acts as a brace for the freely movable scapula
(shoulder blade), and helps to hold the shoulders in place. It also
provides attachments for muscles, tendons, and for the "interclavicular
ligaments" of the arm, chest and back. As a result of its elongated double
curve, the clavicle is weakly built. If it is compressed from the end by
abnormal pressures on the shoulder, it is likely to fracture.