What is the collar?
The collar, which is a common name for the collarbone, is a short, narrow bone, which is horizontally extending over the upper part of the chest. It stretches bilaterally from the chest or bone of the breast in the center of the chest to the process of the blade acromions at the top of the arm. The S -shaped bone that felt easily at the base of the neck is the front of the structure known as the shoulder belt or patch, which also contains shoulder blades. This structure is responsible not only for connecting the arms to the axial skeleton in the trunk of the body, but also for serving as a place for muscles that move the arm on the shoulder. In addition, the location of the collar bone, elevated above the glenohumeral or shoulder joint, enables a large range of movement in the joint.
Found just above the highest rib, the collarbone meets with Sternam on its interior or media end in the middle of the chest. Articulation between the collar bone and the structure ofThe thoracic colt called Manubrium is called sternoclavicular joint, synovial saddle joint, which allows a certain movement of the collarbone and down and up and down, and less rotation. At the outer or side ends of the bone, where it is articulated with the shoulder blade, is an acromioclavicular joint. Acromion of the shoulder blade is a large bone protrusion that is laterally and up from the top of the shoulder blade, which is easily felt on the upper part of the arm above the arm. This articulation is a synovial gliding joint that allows the collar bone to be rotated against the shoulder blade when lifting the arm above the head.
Many muscles that move the arms or shoulder blades attached to the collar bone. This includes trapezoids and deltoid muscles on its top. Trapezius is a large muscle of the upper back, whose upper fiber shoulder shoulders, while the deltoide is a prominent shoulder muscles that raises the arm from the body in several directions.
on the front surface of the collarbone is the main pectoralis. This muscle is responsible for the horizontal manualarms or pulling arms inwards towards the center of the chest when they are raised to the height of the shoulders. The muscles attached to the back of the collar bone include trapezoids and also sternocleidomastoid, which is the muscles in the throat that bends the head forward and turns it from side to side.
Since the collar is prominently placed, relatively unprotected by fat and muscle and consists of predominantly spongy bone, it is rather susceptible to injury. Common injuries include bone dislocation from one of its two joints and fractures. This may occur as a result of a fall or sudden impact and are common in athletes, in children due to the shoulders through the birkanal during work and in front of adolescent children, because the bone is rarely formed until late.