THE FIRST PORTION OF THE RIGHT SUBCLAVIAN ARTERY 557 



Branches. — The vertebral, internal mammary, and tlwreo-cervical trunk 

 (thyreoid axis) usually arise from the first portion on the left side. (See p. 559.) 



THE FIRST PORTION OF THE RIGHT SUBCLAVIAN ARTERY 



The first portion of the right subclavian artery (fig. 457) extends from its origin 

 at the bifurcation of the innominate, behind the upper margin of the right sterno- 



FiG. 457. — The Subclavian Artery. (After Toldt, "Atlas of Human Anatomy," Rebman, 



London and New York. 



Medial palpebral arteri 

 Tarsal arch{^-^'V/^^ 



Lateral palpebral arteries 



Infra -orbital artery 



Superior labial artery "■ 

 Anterior auricular branches ^r-fi 



Perforating branches of the!^ 

 posterior auricular artery !■» 



Inferior labial artery 



Mental artery 

 • Submental artery — 



Carotid artery{ge;-\ 



Superior thyreoid artery 

 Levator scapulae muscle 

 Common cartoid artery 



Inferior thyreoid artery ^^^ 



Phrenic nerve 



Vertebral artery ^ 



Transverse scapular 

 artery 



Subclavian artery 



Serratus anterior 

 muscle — 



Internal mammary 



artery f 



Innominate artery 

 Pericardico-phrenic — 

 artery 

 Thymic artery" 

 Vena cava superior — __, 



Thymus / ""' 



Intercostal t 

 branches "~^~^ 

 Costal pleura 

 Perforating 

 branches 



Anterior medi 

 astinal artery 



Superior 



phrenic 



artery 



Superior 



epigastric 



artery 

 Musculo- 

 phrenic 

 artery 



Supra-orbital artery 



,,Frontal artery 



^Dorsal nasal artery 



,,^ Zygomatico-orbital artery 

 Left naris 



.-'Frontal branch \ of the superficial 

 Parietal branch j temporal artery 



Zygomatic muscle 



— -Transverse facial artery 



- — -Superficial temporal artery 



— Masseter muscle 



:^ External maxillary artery 



Hyoid branch of the lingual artery 

 Superior laryngeal artery 



Posterior branch 1 ^^ ^j^^ ^^^^^.^^^ 

 Anterior branch J tliyeoid artery 

 — -Glandular branch 

 — Trapezius muscle 



Ascending cervical artery 



Superficial cervical 

 — artery 



Transverse cervical 



artery 

 Brachial plexus 

 Transverse scapular 

 artery 

 1 Phrenic nerve 



f Internal mammary 



l' -^ artery 



""^T^'i^ Pericardico-phrenic 



artery 

 . — Arch of the aorta 



^ "-.V a,_;^ Pericardiac 



\ ""^^K branches 



Y "^i.®^^,-— Bronchial artery 



\ 

 '^ - V \ -Mediastinal 



pleura 



"i~j>. Mediastinal 

 branches 



Pericardium 



Internal mam- 

 ■■^/^ mary artery 



clavicular joint, upward and laterally in a gentle curve over the apex of the right 

 lung and pleura to the medial border of the scalenus anterior. It measures about 

 3 crn. (IJ in.). In this course it ascends in the neck a variable distance above the 

 clavicle, but is so deeply placed, so surrounded by important structures, and gives 



