Subclavian trunk

Subclavian Trunk is a significant anatomical structure in the human body, specifically within the circulatory system. It is a branch of the brachiocephalic trunk, which is itself a major artery originating from the aortic arch. The subclavian trunk primarily serves to supply blood to the upper limbs, neck, and portions of the thoracic region.

Anatomy

The subclavian trunk typically arises from the brachiocephalic trunk on the right side of the body, and directly from the aortic arch on the left side. It extends laterally towards the upper limbs, passing over the top of the lungs and under the clavicle, hence its name 'subclavian'.

The subclavian trunk gives rise to several important branches, including the vertebral artery, the internal thoracic artery, and the thyrocervical trunk. These branches supply blood to various structures in the neck, thorax, and upper limbs.

Clinical Significance

Due to its critical role in blood supply, the subclavian trunk is often involved in various medical conditions. For instance, Subclavian Steal Syndrome is a condition where blood flow is reversed in the vertebral artery due to a blockage in the subclavian artery. This can lead to symptoms such as dizziness, weakness, and potentially stroke.

See Also

• Brachiocephalic trunk
• Aortic arch
• Subclavian Steal Syndrome

References

• Gray's Anatomy: The Anatomical Basis of Clinical Practice. 41st Edition. Elsevier, 2016.
• Moore, Keith L., et al. Clinically Oriented Anatomy. 7th Edition. Lippincott Williams & Wilkins, 2013.