Incise the skin and subcutaneous tissue the length of the spine distally to the shoulder joint. Transect the omotransversarius muscle from the spine, and reflect it cranially. Incise trapezius and scapular parts of the deltoideus muscles from the spine, and reflect them caudally. Incise the supraspinatus and infraspinatus muscular attachments to the spine, and elevate these muscles from the scapular body (Plate 52A).