#Clavicle #Bone #Anatomy #Bony #Landmarks #Articulations #Capabilities #Attachments #Scientific #features
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Clavicle Bone Anatomy : Bony Landmarks and Articulations , Capabilities, Attachments, Scientific features
The clavicle (collarbone) extends between the manubrium of the sternum and the acromion of the scapula.
It’s classed as a protracted bone and will be palpated alongside its size. In skinny people, it’s seen beneath the pores and skin. The clavicle has three most important features:
Attaches the higher limb to the trunk as a part of the ‘shoulder girdle’.
Protects the underlying neurovascular constructions supplying the higher limb.
Transmits drive from the higher limb to the axial skeleton.
On this article, we will take a look at the anatomy of the clavicle – its bony landmarks and medical correlations.
Bony Landmarks and Articulations
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The clavicle is a slender bone with an ‘S’ form. Dealing with ahead, the medial side is convex, and the lateral side concave. It may be divided right into a sternal finish, a shaft and an acromial finish.
Sternal (medial) Finish
The sternal finish comprises a big side – for articulation with the manubrium of the sternum on the sternoclavicular joint.
The inferior floor of the sternal finish is marked by a tough oval melancholy for the costoclavicular ligament (a ligament of the SC joint).
Shaft
The shaft of the clavicle acts a degree of origin and attachment for a number of muscle tissues – deltoid, trapezius, subclavius, pectoralis main, sternocleidomastoid and sternohyoid
Acromial (lateral) Finish
The acromial finish homes a small side for articulation with the acromion of the scapula on the acromioclavicular joint. It additionally serves as an attachment level for 2 ligaments:
Conoid tubercle – attachment level of the conoid ligament, the medial a part of the coracoclavicular ligament.
Trapezoid line – attachment level of the trapezoid ligament, the lateral a part of the coracoclavicular ligament.
The coracoclavicular ligament is a really sturdy construction, successfully suspending the load of the higher limb from the clavicle.
Scientific Relevance: Fracture of the Clavicle
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The clavicle acts to transmit forces from the higher limb to the axial skeleton. Given its relative dimension, this leaves it significantly prone to fracture. The most typical mechanism of damage is a fall onto the shoulder or onto an outstretched hand.
With the clavicle arbitrarily divided into thirds:
15% of fractures happen within the lateral third
80% happen within the center third
5% happen within the medial third.
After a fracture, the lateral finish of the clavicle is displaced inferiorly by the load of the arm and displaced medially by the pectoralis main. The medial finish is pulled superiorly by the sternocleidomastoid muscle.
Administration of a clavicular fracture will be conservative (e.g. sling immobilization) or operative (e.g. open discount and inside fixation). The supraclavicular nerves lie in shut proximity to the clavicle and are often sacrificed throughout a surgical restore – leading to a numb patch over the higher chest and shoulder.
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