The lateral end of the clavicle is the one closest to the arm and farthest from the breastbone. It articulates with the acromion process of the scapula.
The acromion process of the scapula articulates with the lateral end of the clavicle. This joint is called the acromioclavicular joint.
The sternoclavicular joint is formed by the medial end of the clavicle and the sternum, while the acromioclavicular joint is formed by the lateral end of the clavicle and the acromion process of the scapula.
The joint between the lateral end of the clavicle and the acromion process of the scapula is the acromioclavicular joint. This joint is sometimes abbreviated "AC joint."
The bones that articulate with the clavicle are the manubrium of the sternal end, and the acromion of the scapula.
The acromium is a region of your shoulder blade. The clavicle is your collarbone. Where the two articulate or form a joint is the acromioclavicular joint. You can palpate this by following your collarbone towards your shoulder until you feel a notch. That is pretty much putting your fingers right on that joint.
The clavicle. This bone is normally not consideredto be part of the shoulder an instead a part of the thorax, which is also true. The reason it is part of the shoulder is that it joint part of the scapula to form the soked of the glenohumeral joint.
Scapula is very interesting bone. It holds the upper limb, but have no bony attachment to your thorax. It is attached to thorax, through the collar bone or the clavicle. Lateral end of the clavicle is attached to the lateral end of the spine of the scapula. On the inside of the spine of the scapula and clavicle, you have insertion of the muscle called as trapezius. From out side of this, you have origin of the deltoid muscle. Technically and mechanically, the trapezius muscle continues as deltoid muscle.
The lateral ends of the clavicles articulate with the acromion processes of the scapulae. This joint is called the acromioclavicular joint.
The lateral third has two surfaces, an upper and a lower; and two borders, an anterior and a posterior.
Acromion process and sternum
Your scapulae are not proximal to the midline of the body. They are lateral to the midline which is marked by the spine. Proximal and distal are used to indicate the position along an arm or leg. If some thing is close to the attachment to the body, that is proximal.
The clavicle is not distal or proximal to the umbilicus. It is superior and lateral.