https://youtu.be/ZKoJzYiAHBwSubscapularis AnatomyOrigin and Structure: Multipennate muscle arising from the subscapular fossa, consisting of 4 to 6 tendon slips.Insertion: Primarily on the inferior facet of the lesser tuberosity, with variable attachment to the bicipital groove and greater tuberosity. The inferior third has a muscular attachment to the anterior humeral metaphysis via a thin memb..