GLOSSARY

The latissimus dorsi is the broadest muscle in the body, covering much of the lower and middle back and connecting the arm to the trunk.
Its name comes from the Latin latissimus, meaning “widest”, and dorsi, meaning “of the back”.

Attachments and Innervation

• Origin: spinous processes of T7–L5 via the thoracolumbar fascia, the iliac crest, the lower ribs, and sometimes the inferior angle of the scapula.
• Insertion: the intertubercular (bicipital) groove of the humerus.
• Nerve: the thoracodorsal nerve (C6–C8).

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