http://en.wikipedia.org/wiki/Pelvis
Muscles
Shoulder and intrinsic back
The inferior parts of latissimus dorsi, one of the muscles of the upper limb, arises from the posterior third of the iliac crest.Its action on the shoulder joint are internal rotation, adduction, and retroversion. It also contributes to respiration (i.e. coughing). When the arm is adducted, latissimus dorsi can pull it backward and medially until the back of the hand covers the buttocks.
Muscles
Shoulder and intrinsic back
The inferior parts of latissimus dorsi, one of the muscles of the upper limb, arises from the posterior third of the iliac crest.Its action on the shoulder joint are internal rotation, adduction, and retroversion. It also contributes to respiration (i.e. coughing). When the arm is adducted, latissimus dorsi can pull it backward and medially until the back of the hand covers the buttocks.
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