We often think of muscles of the shoulder as what is directly at the shoulder site for example deltoids. It would be more beneficial to your health, motion and results if you thought of shoulder muscles as all the muscles that impact your motion at the shoulder joint.
Below is the list of these muscles.
Deltoids – Anterior, Middle & Posterior
Pectoralis – Major (Sternal & Clavicular Divisions)
Coracobrachialis
Latissimus Dorsi
Teres Major
Supraspinatus
Infraspinatus
Teres Minor
Subscapularis
