The name manubrium comes from the Latin meaning "sleeve", wrist", because of its specific shape.
The manubrium is the upper part of the sternum involved in the sterno-clavicular joint and the attachment of the first two ribs.
The manubrium is up to 10 to 12 centimetres thick. The bone becomes narrower as it extends to the sternum.
The manubrium links the shoulder to the trunk.
The sterno-clavicular joint and the insertion of the first rib. © DR