Triangle of auscultation

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Triangle of auscultation
Muscles connecting the upper extremity to the vertebral column. (Triangle of auscultation visible but not labeled.)
Latin trigonum auscultationis
Gray's subject #121 434
Dorlands/Elsevier t_19/12823351

The triangle of ausculation is situated behind the scapula.

It is bounded above by the Trapezius, below by the Latissimus dorsi, and laterally by the vertebral border of the scapula; the floor is partly formed by the Rhomboideus major.

If the scapula be drawn forward by folding the arms across the chest, and the trunk bent forward, parts of the sixth and seventh ribs and the interspace between them become subcutaneous and available for auscultation (hence the name).

Doctors use it to listen to breathing because it can be heard more clear than other parts of the back due to the lack of many muscles underneath it.

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.