Scapula, also known as the “shoulder blade,” is part of the shoulder girdle and connect the clavicle to the humerus.  4 of the muscles originated from the scapula (Supraspinatus, Infraspinatus, Subscapularis and Teres Minor) form the rotator cuff that surrounds the shoulder joint.  The bone mass (or thickness) of the scapula can indicate age of the individual (older individual have thinner scapula).

Landmarks of the scapula include:

1. Superior angle
2. scapular notch
3. coracoid process
4. glenoid fossa
5. lateral border
6. inferior angle
7. medial border
8. supraspinous fossa
9. infraspinous fossa
10. subscapular fossa
11. supraglenoid tubercle
12. infraglenoid tubercle/tuberosity.

Muscles that originate or insert into the scapula include:

1. Pectoralis minor
2. Biceps brachii
3. Coracobrachialis
4. Levator scapulae
5. Rhomboids
6. Teres Major
7. Teres Minor
8. Subscapularis
9. Latissimus dorsi
10. Triceps brachii (long head)
11. Infraspinatus
12. Deltoid
13. Serratus anterior
14. Omohyoid

To distinguish left and right, go to here.