Brachiocephalic Trunk

The brachiocephalic trunk or truncus brachiocephalicus is the part of the aorta that originates from the left mouth of the aortic sinus and passes into the right shoulder joint and the ascending aorta. The brachiocephalic trunk is divided into two sections - supravalvular and intravalvular. Three large branches extend from the supravalvular trunk - the right subclavian a. subclavia dextra, left subclavian and left dorsal aoa.

**Supravalvular parts of the brachiocephalic trunk.** Supravalvular part is located between the level of the aortic opening and the valve of the anterior semilunar artery. The supravalvular branches have a connective tissue membrane both among themselves and with neighboring vessels. The right artery arises at the level of the posterior border of the superior thyroid gland and from there continues as the brachial a. brachialis (at the level of the middle third of the shoulder). The left brachial artery lies in the subvalvular foramen of the sternocleidomastoid muscle, and below this foramen passes into a small deep branch to the neck and then lies in front of the extensor cervicis longus. The right vessel is one of 4 small external branches of the thyrocondylar artery. The left thoracic branch is located in the thoracic

The brachiocephalic trunk is the anatomical formation that connects the humerus and the skull. With the help of this formation, blood supply to the brain is carried out. The brachiocephalic trunk is a paired venous formation in humans. The main artery in this system is the right subclavian, which along its path merges with the vertebral column. The right and left trunks connect to the arterial branches of the right and left subclavian arteries. All this gives rise to the carotid artery. The formation of the trunk begins with the 4th cervical vertebra, descends through the subclavian groove to the collarbone and goes further to the first rib. At the second intercostal space, the brachiocephalic vessels emerge between the internal and middle saphenous