![]() ![]() Thyroid ima artery – This is an extra artery supplying the thyroid gland, apart from its main blood supply (superior and inferior thyroid arteries), that can arise from various locations within the branches of the aortic arch.This type of variation is present in approximately 0.5-2% of the population. Aberrant right subclavian artery – Instead of being a part of the brachiocephalic trunk, it arises as a separate branch directly from the aortic arch.However, in approximately 6% of cases they could rise directly from the aortic arch. Variant origin of vertebral arteries – Usually the vertebral arteries originate from the posterior superior portion of the subclavian artery on both sides to supply blood to the brain.This type of variation is present in approximately 15% of the population. Bovine arch – This occurs when the brachiocephalic artery and left common carotid artery share a common origin, while the right subclavian artery is present distal to this.The left subclavian artery branches into the vertebral arteries, internal thoracic arteries, thyrocervical trunks, costocervical trunks and dorsal scapular arteries to supply the neck, thoracic wall, spinal cord, brain, meninges and upper limbs.Īlthough the above branching patterns are standard, sometimes they can differ, as outlined in these variations:.This supplies the neck, face, skull, middle ear, brain, pituitary gland (hypophysis), orbit and choroid plexus. The left common carotid artery branches at the carotid sinuses into the internal and external carotid arteries.The brachiocephalic trunk branches into the right common carotid artery and the right subclavian artery supplying the right side of the head, neck and right arm.Usually (in 80% of cases according to this article), it has three main branches: The aortic arch supplies fresh blood to the head, neck and upper limb regions via its branches. It begins at the level where the second rib joins the sternum on the right side of the body, then passes over the trachea, crossing to its left side. The aortic arch is convex-shaped and is a continuation of the ascending aorta. Anatomical variations in the branching patterns of the aortic archīefore diving in, we should examine the anatomy of the aortic arch in more detail. ![]()
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