The latissimusdorsi muscle is the largest muscle in the body, up to 20 by 40 centimeters, allowing coverage of extremely large wounds. In spite of its size, no significant donor functional deficit results from removal of the muscle. It is the largest flap that can be harvested on a single predicle, and can even be combined with the serratus, scapular or parascapular flaps, to create a flap complex that can cover massive wounds. In the normal population the muscle is quite thin (less than 1 centimeter thick), allowing it to be draped over irregular surfaces with ease. With the rectus muscle and radial forearm flap, it represents one of the workhorse flaps in reconstructive microsurgery. When re-innervated using the thoracodorsal nerve, the latissimus can be used as a functional muscle.背阔肌是身体面积较大肌肉支一，达到20*40cm，可以转移修复巨大创面，尽管其体积大，但对供区功能影响很小。
