Muscles - Shoulder Region

Muscles of the Shoulder Region Deltoid Origin - Lateral third of clavicle, acromion, and spine of scapula Insertion - Deltoid tuberosity of humerus Axillary Action - Abducts, adduucts, flexes, extends, and rotates arm medially Supraspinatus Origin - Supraspinous fossa of scapula Insertion - Superior facet of greater tubercle of humerus Suprascapular Action - Abducts arm Infraspinatus Origin - Infraspinous fossa Insertion - Middle facet of greater tubercle of humerus Suprascapular Action - Rotates arm laterally Subscapularis Origin - Subscapular fossa Insertion - Lesser tubercle of humerus Nerve - Upper and lower subscapular Action - Adducts and rotates arm medially Teres major Origin - Dorsal surface of inferior angle of scapula Insertion - Medial lip of intertubercular groove of humerus Nerve - Lower subscapular Action - Adducts and rotates arm medially Teres minor Origin - Upper portion of lateral border of scapula Insertion - Lower facet of greater tubercle of humerus Axillary Action- Rotates arm laterally Latissimus dorsi Origin - Spines of T7 T12 thoracolumbar fascia, iliac crest, ribs Insertion - Floor of bicipital groove of humerus Thoracodorsal Action - Adducts, extends, and rotates arm medially ◄.....Go back to the Gross Anatomy homepage