origin - scapula and deep fasciainsertion - humerusinnervation - suprascapular nerveblood supply - suprascapular arteryaction - lateral rotation of arm (with teres minor)

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1.
origin - scapula and deep fascia

insertion - humerus

innervation - suprascapular nerve

blood supply - suprascapular artery

action - lateral rotation of arm (with teres minor)