ANATOMY

Detailed explanation-1: -The orientation of the clavicle can be distinguished by its ends: a broad, flat acromial end (referred to as the lateral third); and a round pyramidal-like sternal end (referred to as the medial two-thirds). Each end has unique bony landmarks, depending whether the superior or inferior surface of the bone is viewed.

Detailed explanation-2: -Even though it is classified as a long bone, the collarbone has no medullary cavity (marrow cavity) like other long bones, though this is not always true. It is made up of spongy cancellous bone with a shell of compact bone. It is a dermal bone derived from elements originally attached to the skull.

Detailed explanation-3: -Looking at the clavicle from above we can see that it’s slightly S-shaped, with a forward curve to its medial half. At its medial end this large joint surface articulates with the sternum. At the lateral end this smaller surface articulates with the scapula.

Detailed explanation-4: -Start your tape measure at the back corner of one shoulder, just below where your clavicle ends. Run it across the top of your shoulders, behind your neck and to the back corner of the other shoulder. Make sure the tape follows the outline of the back touching the underside of the collar.