INFRASPINATUS
| ORIGIN Medial three quarters of infraspinous fossa of scapula and fibrous intermuscular septa |
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| INSERTION Middle facet of greater tuberosity of humerus and capsule of shoulder joint |
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| ACTION Laterally rotates arm and stabilizes shoulder joint |
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| NERVE Suprascapular nerve (C5, 6 ) (from upper trunk) |