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A large branch of the axillary a., the posterior circumflex humeral a. runs through the quadrangular space with the axillary n., and supplies blood mainly to the deltoid m. and the shoulder joint.
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A large branch of the axillary a., the posterior circumflex humeral a. runs through the quadrangular space with the axillary n., and supplies blood mainly to the deltoid m. and the shoulder joint.