Origin Infraspinous fossa of scapula
Insertion Middle facet on greater tuberosity of humeruss
Action Laterally rotate arm; helps to hold humeral head in glenoid cavity of scapula
Innervation Suprascapular nerve (C5 and C6) (C5, C6)
Arterial Supply Suprascapular and circumflex scapular arteries


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