Final answer:
The sternoclavicular joint is the articulation between the manubrium of the sternum and the sternal end of the clavicle, forming the sole bony connection between the pectoral girdle and the axial skeleton.
Step-by-step explanation:
The type of joint found at the location where the sternal end of the clavicle articulates with the manubrium of the sternum is known as the sternoclavicular joint. This joint is significant because it forms the only bony attachment between the pectoral girdle of the upper limb and the axial skeleton. The sternoclavicular joint permits a wide range of motion, allowing the shoulder to move in various directions.
The sternoclavicular joint is a pivotal element in shoulder mobility, supporting movements such as elevation and depression, as well as protraction and retraction of the scapula. It is also indirectly supported by the costoclavicular ligament, which extends from the sternal end of the clavicle to the first rib, helping to stabilize the joint.