Atlas and text-book of topographic and applied anatomy . muscle. (d) The suprascapular, which is frequently an independent branch of the subclavian vessel runs slightly downward to the upper margin of the scapula and is concealed beneaththe clavicle; it passes over the transverse ligament of the scapula to reach the supraspinous fossaand then skirts the neck of the bone and enters the infraspinous fossa. It supplies the supra-spinatus and infraspinatus muscles and anastomoses with the subscapular branch of the axillaryartery (see page 74 and Fig. 30). 4. The coslocervical axis, a s
Atlas and text-book of topographic and applied anatomy . muscle. (d) The suprascapular, which is frequently an independent branch of the subclavian vessel runs slightly downward to the upper margin of the scapula and is concealed beneaththe clavicle; it passes over the transverse ligament of the scapula to reach the supraspinous fossaand then skirts the neck of the bone and enters the infraspinous fossa. It supplies the supra-spinatus and infraspinatus muscles and anastomoses with the subscapular branch of the axillaryartery (see page 74 and Fig. 30). 4. The coslocervical axis, a short trunk which passes posteriorly and divides into: (a) The superior intercostal artery (see page 96) for the first one or two intercostal spaces, and (b) The deep cervical artery, which runs posteriorly over the neck of the first rib to supplythe deep muscles of the neck and back. Fig. 27. Superior thyroid vein Internal mammary arteryIntern Fourth cervical nerve M. scalenus inch Phrenic nerveVertebral arteryM. scalenus ; cervical artery. M. subclavius Acromio-thoracic arteryClavicle Brachial plexus Costo-coracoid membrane Fig. 28.
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