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Just two bones make up the pectoral girdle. The clavicle (collarbone) and the scapula (shoulder blade). The clavicle is anterior and articulates with the acromion of the scapula and the sternal manubrium. The scapula is posterior and articulates with the head of the humerus.
The Scapula
A |
Acromion: this is the point of articulation for the clavicle. |
B |
Spine: visible only on the posterior view of scapula |
C |
Medial Border |
D |
Lateral Border |
E |
Coracoid Process: point of muscle attachment |
F |
Suprascapular Notch |
G |
Glenoid Cavity: point of articulation with the head of the humerus. |
The Clavicle
You have to look at the clavicle very carefully to tell which end is which. The sternal end is triangularly shaped and the acromial end is kind of flat. The Conoid tubercle is closest to the acromial end.
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