1. Practical # 2
To study & demonstarte Clavicle bone
a) Rightclavicle,superiorview
b) Rightclavicle,inferiorview
2. Practical # 2
To study & demonstarte Clavicle bone
The clavicles are cylindrical bones extends between the sternum and the acromion of the
scapula around 6 inches (15 cm) long and curved in the transverse plane like a letter S, located
in the thoracic region superior and anterior to the first rib.
The name clavicle comes from the Latin word for “little key” and describes the shape of the
clavicle as an old-fashioned skeleton key
Bony Landmarks
The clavicle is a slender bone with an ‘S’ shape. Facing forward, the medial aspectis convex,
and the lateral aspect concave. It can be divided into a sternal end, a shaft and an acromial end.
Sternal (medial) End
The sternal end contains a large facet – for articulation with the manubrium of the sternum at
the sternoclavicular joint.
The inferior surface of the sternal end is marked by a rough oval depression, the costal
tuberosity, for the costoclavicular ligament
Shaft
The shaft of the clavicle acts a point of origin and attachment for several muscles – deltoid,
trapezuis, subclavius, pectoralis major, sternocleidomastoid and sternohyoid
Acromial (lateral) End
The acromial end houses a small facet for articulation with the acromion of the scapula at
the acromioclaviclar joint. The acromial end has a rough inferior surface that bears a ridge,
the trapezoid line, and a small rounded projection, the conoid tubercle (above the coracoid
process). Thesesurface features are attachment sites for muscles and ligaments of the shoulder.
Functions:
It is classed as a long bone. In thin individuals, it is visible under the skin. The clavicle has three
main functions:
Attaches the upper limb to the trunk.
Protects the underlying neurovascular structures supplying the upper limb.
Transmits force from the upper limb to the axial skeleton.
