Shoulder ROTATOR CUFF Muscles: Origins, Insertions, and Actions

What is the origin of the Supraspinatus?

Supraspinous fossa of the scapula

What is the insertion of the supraspinatus?

Greater tubercle of the humerus

What are the actions of the supraspinatus?

ABduction of the arm, stabilization of the humeral head in glenoid cavity

What is the origin of the Infraspinatus?

Infraspinous fossa of the scapula

What is the insertion of the Infraspinatus?

Greater tubercle of the humerus

What are the actions of the infraspinatus?

Arm external (lateral) rotation, stabilizes humeral head in glenoid cavity

What is the origin of the Teres Minor?

Lateral boarder of scapula

What is the insertion of the Teres Minor?

Greater tubercle of the humerus

What are the actions of the Teres Minor?

Arm external (lateral) rotation, arm aDduction, stabilizes humeral head in glenoid cavity

What is the origin of the Subscapularis

Subscapular fossa of scapula

What is the insertion of the Subscapularis?

Lesser tubercle of humerus

What are the actions of the Subscapularis?

Arm internal rotation, stabilizes humeral head in glenoid cavity

What is the shoulder joint called?

The glenohumeral joint