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Muscle:
Teres Major (Musculus teres major)

Attachments: Origin & Insertion
Origin: (proximal attachment)
a. Lower lateral border and inferior angle of the scapula.

Insertion: (distal attachment)
a. Medial lip of the intertubercular (bicipital) groove of the anterior humerus.

Actions:
a. Adducts the arm at the shoulder (glenohumeral) joint.
b. Medially rotates the arm at the shoulder (glenohumeral) joint.
c. Extends the arm at the shoulder (glenohumeral) joint.

Nerves & Nerve Roots:
a. Lower subscapular nerve.
a. C5, C6, and C7.


















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Subscapularis Muscle