Remove the exposed superficial fascia and define the borders of the trapezius muscle and latissimus dorsi muscle (Figure 1.3).
Anatomically, two triangular shaped spaces can be identified: the triangle of auscultation and the lumbar triangle. The triangle of auscultation is bordered by the trapezius muscle, latissimus dorsi muscle, and the medial border of the scapula. The lumbar triangle is bordered by the latissimus dorsi muscle, external abdominal oblique muscle, and iliac crest.
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