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Muscle: Latissimus dorsi (Musculus latissimus dorsi)
b. Rotating 3D Image of the muscle (in new tab or window).

Attachments: Origin & Insertion
Origin: (proximal attachment)
a. Spinous processes of T7 - L5 vertebrae.
b. Iliac crest of sacrum.
c. Thoracolumbar fascia.
d. Inferior angle of the scapula.
e. Lower three or four ribs.

Insertion: (distal attachment)
a. Floor of intertubercular (bicipital) groove of 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. Thoracodorsal nerve.
a. C6, C7, and C8.


















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Subscapularis Muscle