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Latissimus Dorsi
Region: Back Muscles · All back muscles
Latissimus Dorsi at a glance
| Origin | Spinous processes of T7–L5, thoracolumbar fascia, iliac crest and lower ribs |
|---|---|
| Insertion | Floor of the intertubercular groove of the humerus |
| Actions | Extends the arm; Adducts the arm; Rotates the arm inward (medial rotation) |
| Nerve supply | Thoracodorsal nerve (C6–C8) |
◆ Good to know
It is the climbing and pull-up muscle; its large flap is also used in reconstructive surgery, tested clinically by feeling it contract when the patient coughs.
More Back Muscles
Please note: This page is an anatomy education summary for students and curious readers, not medical advice. Attachment points are given in their classic short form; individual anatomy varies, and detailed dissection-level descriptions belong in an anatomy atlas.