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Deltoid m.
- Proximal: lateral 1/3 part of clavicle, acromion, spine of scapula
- Distal: Deltoid tuberosity of humerus
- F: Abduct humerus, flexion and rotation of humerus, extension and lateral rotation of humerus
- N.: axillary n.
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Supraspinatus m.
- O: Supraspinatus fossa of scapula
- I: Superior facet of greater tubercle of humerus
- F: First 15o of abduction of humerus
- N: suprascapular n
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Infraspinatus m.
- O: Infraspinatus fossa of scapula
- I: Middle facet of greater tubercle of humerus
- F: Lateral rotation of humerus; helps hold humeral head in glenoid cavity
- N: suprascapular n.
-
Teres minor m.
- O: Middle part of lateral border of scapula
- I: Inferior facet of greater tubercle of humerus
- F: Lateral rotation of humerus; helps hold humeral head in glenoid cavity
- N: axillary n.
-
Teres major m.
- O: Dorsal surface of inferior angle of scapula
- I: Medial lip of intertubercular groove of humerus
- F: Extension, adduction and medial rotation of humerus (same as latissimus dorsi m.)
- N: lower subscapular n.
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Rotator cuff muscles
- SITS
- Supraspinatus, infraspinatus, teres minor, and subscapularis (inserts to lesser tubercle)
- SIT insert into greater tubercle
-
Subscapularis m.
- O: Subscapular fossa of scapula
- I: Lesser tubercle of humerus
- F: Medial rotation of humerus; helps hold humeral head in glenoid cavity
- N: upper and lower subscapular n
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