Via thoracolumbar fascia (TLF) from spinous processes of T6–T12, lumbar and sacral vertebrae and iliac crest. Also lower 3–4 ribs and bottom (inferior) edge of scapula
Top of the humerus (anterior)
Shoulder (glenohumeral) joint
Adducts and extends arm
Assists in medial rotation of the arm.
Depresses the shoulder girdle via the insertion on the humerus (origin fixed)
Standing Latissimus dorsi stretch, Kneeling Latissimus dorsi stretch