What joint is formed by the meeting of the scapula and clavicle at the top of the shoulder?

The acromioclavicular joint is formed by the meeting of the acromion process of the scapula and the clavicle, located at the top of the shoulder. This joint plays a crucial role in shoulder movement and stability, serving as a connection point between the upper limb and the axial skeleton. It allows for the necessary range of motion needed for various activities, such as reaching overhead or lifting.

The acromioclavicular joint is uniquely positioned to enable the scapula to move freely during arm movements, which is essential for maintaining shoulder function. Additionally, this joint is supported by ligaments that provide stability while also allowing for some degree of movement during shoulder activities. This is why it is a fundamental joint in the shoulder complex, distinguishing it from other described joints.