It is the first branch of the aortic arch, and soon after it emerges, the brachiocephalic artery divides into the right common carotid artery and the right subclavian artery.
32.
In the innominate artery, the average reading is 110 / 70 mmHg, the right subclavian artery averages 120 / 80 and the abdominal aorta is 110 / 70 mmHg.
33.
The left recurrent laryngeal nerve passes under and around the aorta on its way to the larynx, whereas the right recurrent laryngeal nerve passes under and around the subclavian artery.
34.
The right and left nerves are not symmetrical, with the left nerve looping under the aortic arch, and the right nerve looping under the right subclavian artery then traveling upwards.
35.
Palpation or ultrasound visualization of the subclavian artery just above the clavicle provides a useful anatomic landmark for locating the brachial plexus, which is lateral to the artery at this level.
36.
On the right side the subclavian artery arises from the brachiocephalic ( innominate ) artery behind the right sternoclavicular articulation; on the left side it springs from the arch of the aorta.
37.
In 1828 Fergusson became a licentiate, and in 1829 a Edinburgh Royal Dispensary, and in that year tied the subclavian artery, which had then been done in Scotland only twice.
38.
The arteries of the fourth arch, which project between the nerves of the fourth and sixth arches, become the left-sided arch of the aorta and the right subclavian artery.
39.
On the left side, the middle cardiac nerve enters the chest between the left carotid and subclavian arteries, and joins the left half of the deep part of the cardiac plexus.
40.
These structures include the aortic arch and right Subclavian artery which, when improperly developed, can lead to cardiovascular defects in addition to craniofacial defects from improper development of cranial nerve V.
