Scalene tubercle

Scalene Tubercle is a small, bony prominence located on the inner border of the first rib. It is named after the scalene muscles, which attach to it. The scalene tubercle serves as a landmark for the division of the subclavian artery and vein.

Etymology

The term "scalene" is derived from the Greek word "skalenos," meaning uneven. This is in reference to the uneven lengths of the scalene muscles. The term "tubercle" is derived from the Latin word "tuberculum," meaning a small swelling or lump, which describes the physical appearance of the scalene tubercle.

Anatomy

The scalene tubercle is located on the inner border of the first rib, between the groove for the subclavian artery and the groove for the subclavian vein. It serves as a point of attachment for the anterior scalene muscle and the medius scalene muscle. The scalene tubercle also separates the grooves for the subclavian artery and vein.

Clinical Significance

The scalene tubercle is a significant anatomical landmark in medical procedures involving the subclavian vein and artery. It is used as a reference point in procedures such as central venous catheterization and subclavian vein catheterization.

Related Terms

• Scalene muscles
• Subclavian artery
• Subclavian vein
• Central venous catheterization
• Subclavian vein catheterization