An Unusual Back Muscle Identified Bilaterally: Case Report.

Cureus. 2018 Jun 15;10(6):e2816. doi: 10.7759/cureus.2816.

Altafulla JJ, Patel M, Tubbs RS, Iwanaga J, Litvack Z.

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Abstract

Most muscular structures in the human body are named based on their function, origin/insertion, or shape. During routine dissection of the back, an unusual muscle was found deep to the rhomboid muscles. The details of this case and a review of the extant literature are provided.

KEYWORDS:

anomaly; myology; respiration; ribs; serratus posterior superior; variation

Figure 1

Serratus Posterior Superior.

Serratus Posterior Superior with its underlying vascular and nerve supply.

Left: medial; right: lateral; up: cephalic; down: caudal.

Figure 2

Back Muscles.

Serratus Posterior Superior running in a vertical fashion.

Left: medial; right: lateral; up: cephalic; down: caudal.