Henry Gray (18251861). Anatomy of the Human Body. 1918.
of Latissimus dorsi is almost horizontal, running from the spinous process of the seventh thoracic vertebra to the inferior angle of the scapula and thence somewhat obliquely to the intertubercular sulcus of the humerus; the lower border corresponds roughly to a line drawn from the iliac crest about 2 cm. from the lateral margin of the Sacrospinalis to the intertubercular sulcus. The upper margin of Pectoralis major extends from the middle of the clavicle to the surgical neck of the humerus; its lower border is practically in the line of the fifth rib and reaches from the fifth costochondral junction to the middle of the anterior border of Deltoideus. The two lines indicating the borders of Pectoralis minor begin at the coracoid process