Muscles of Shoulder - Origins, Insertions, Innervations | Anatomy Tutorial

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The Subscapularis muscle originates from the subscapular fossa. Its fibers converge laterally to be inserted on the lesser tubercle of humerus. Subscapularis is supplied by the upper and lower subscapular nerves.
The teres major muscle originates from the posterior aspect of the inferior angle of the scapula. Its insertion is on the medial lip of the intertubercular suclus, and is supplied by the lower subscapular nerve.
The suprapinatus muscle originates from the supraspinous fossa and its slender tendon inserts on the greater tubercle of humerus.
The infraspinatus muscle originates from the infraspinous fossa. Its insertion is on the greater tubercle of humerus just inferior to the insertion of supraspinatus.
These two muscles are supplied by the suprascapular nerve.
The teres minor muscle originates from the lateral border of scapula. Its insertion is on the greater tubercle of humerus just inferior to the insertion of the infraspinatus.

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