Location of the deltoid muscles
Highlighted in orange, the deltoids cover the rounding of the shoulder joint.
This diagram illustrates the deltoideus in relation to the lumbar triangle, infraspinatus, teres major, lattissimus dorsi, and lumbodorsal fascia.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Deltoideus posterior."
http://en.wikipedia.org/wiki/File:Deltoideus_posterior.PNG
Wikipedia
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