Sunday, October 3, 2010

Interscalene Triangle

The interscalene traingle is the most medial of the three confined spaces that make up the thoracic outlet. It is bordered anteriorly by the anterior scalene muscle (AS) and posteriorly by the middle (MS) and posterior scalene muscles. The first rib (1) is makes up the floor.

The superior (C5-C6) and middle (C7) trunks of the brachial plexus pass through the upper part of the interscalene triangle and the lower (C8-T1) trunk travels through the lower part of the triangle behind the subclavian artery (SA). The subclavian vein (SV) is anterior to the triangle behind the clavicle (C).

References

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