Thyrocervical trunk

Thyrocervical Trunk

Diagram of the thyrocervical trunk and its branches.

The thyrocervical trunk is a major artery of the neck that arises from the subclavian artery. It is an important vessel that supplies blood to several structures in the neck and upper back region.

Anatomy

The thyrocervical trunk originates from the first part of the subclavian artery, which is located just medial to the anterior scalene muscle. It is a short, thick vessel that quickly divides into several branches.

Branches

The thyrocervical trunk typically gives rise to three main branches:

• Inferior thyroid artery: This artery ascends to supply the thyroid gland, parathyroid glands, and adjacent muscles and tissues.
• Transverse cervical artery: This artery courses laterally across the neck, supplying the trapezius muscle and other structures in the posterior triangle of the neck.
• Suprascapular artery: This artery travels laterally and posteriorly to supply the supraspinatus and infraspinatus muscles of the shoulder.

In some individuals, a fourth branch, the ascending cervical artery, may also arise from the thyrocervical trunk. This artery supplies the prevertebral muscles and the spinal cord.

Function

The primary function of the thyrocervical trunk is to provide arterial blood supply to the thyroid gland, neck muscles, and parts of the shoulder. It plays a crucial role in maintaining the vascular supply to these regions, which is essential for their normal function.

Clinical Significance

The thyrocervical trunk is of clinical importance due to its proximity to other vital structures in the neck. It is often encountered during surgical procedures involving the neck, such as thyroidectomy or cervical lymph node dissection. Understanding its anatomy is crucial for avoiding vascular injury during such procedures.

Related pages

• Subclavian artery
• Thyroid gland
• Neck
• Trapezius muscle
• Shoulder