Latissimus dorsi

Origin

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

Insertion

Top of the humerus (anterior)

Joint crossed

Shoulder (glenohumeral) joint

Joint actions

Adducts and extends arm

Assists in medial rotation of the arm.

Depresses the shoulder girdle via the insertion on the humerus (origin fixed)

Exercise example(s)

Lat Pulldown

Stretch example(s)

Standing Latissimus dorsi stretch, Kneeling Latissimus dorsi stretch