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Pectoral Girdle
Appendicular
| Term | Definition |
|---|---|
| Pectoral Girdle | Articulates with the trunk and supports the upper limbs - clavicles and scapulae - allows muscles to move arms - shoulder joint has a shallow cavity |
| Clavicle | S-shaped bone - extends between manubrium of the sternum and acromion of scapula. |
| Sternal End | Articulates medially with the manubrium of sternum - forms sternoclavicular joint |
| Acromial End | articulates laterally with the acromion of the scapula - broad, flattened - forms acromioclavicular joint |
| Conoid Tubercle | ligament attachment sites - only in the clavicle, inferior surface, near acromial end - small round projection |
| Costal Tuberosity | - Large, rough projection - ligament attachment site - Near sternal end |
| Scapula | Shaped like a broad flat triangle - 3 boarders, 3 angles |
| Glenoid Cavity | Articulates with the head of the humerus |
| Superglenoid tubercle | superior edge of glenoid cavity - attachment sites for the muscles that position the shoulder and arm |
| infraglenoid tubercle | Inferior edge of glenoid cavity - Attachment site for muscles |
| Spine of scapula | Posterior bony ridge |
| Supraspinous fossa | Trench above the spine of scapula |
| Infraspinous fossa | Trench below the spine of scapula |
| Acromion of scapula | Lateral side, larger, flattened posterior process - bony tip of shoulder |
| Coracoid Process | Anterior smaller projection of the shoulder |
| Subscapular fossa | Anterior surface of - broad, smooth surface of scapula, slightly concave |