Supraspinatus
Origin: Supraspinous fossa of the scapula Insertion: Greater tubercle of the humerus Action: Abducts and laterally rotates the shoulder. Stabilises the shoulder by by pulling the humeral head into the glenoid.
Origin: Supraspinous fossa of the scapula Insertion: Greater tubercle of the humerus Action: Abducts and laterally rotates the shoulder. Stabilises the shoulder by by pulling the humeral head into the glenoid.
Origin: Infraspinous fossa of the scapula Insertion: Greater tubercle of the humerus Action: Laterally rotates the shoulder. Stabilises the shoulder by by pulling the humeral head into the glenoid.
Origin: Upper two-thirds of the lateral border of the scapula Insertion: Greater tubercle of the humerus Action: Laterally rotates the shoulder. Stabilises the shoulder by by pulling the humeral head into the glenoid.
Origin: Subscapular fossa of the scapula Insertion: Lesser tubercle of the humerus Action: Medially rotates the shoulder. Stabilises the shoulder by by pulling the humeral head into the glenoid.