We often think of muscles of the shoulder as what is directly at the shoulder site...
Science
Anterior Deltoid Origin: Anterosuperior border of the lateral 1/3 of the clavicle. Insertion: Deltoid tuberosity of humerus on...
The deltoid does the smallest share of the work exactly where the lateral raise begins — and...
Posterior deltoid Origin: Inferior margin of spine of scapula. Insertion: Deltoid tuberosity of humerus. Action: Abduction, horizontal extension...
