The collarbone (clavicle) is one of the main bones of the
shoulder joint. The collarbone holds the shoulder up and back,
and along with the shoulder blade (scapula) and
acromioclavicular (AC) joint helps increase the stability and
strength of the shoulder. The collarbone also protects nerves
and blood vessels from the neck to the shoulder. How this
information was developed to help you make better health
decisions.