Latissimus dorsi stretch9/1/2023 ![]() ![]() The skin covering the latissimus dorsi muscle is supplied by roots T4 to T12, inclusive by both ventral and dorsal rami, as well as the dorsal rami of L1 to 元. Thoracodorsal nerve (C6 – C8) from the posterior cord of the brachial plexus, which enters the muscle on its deep surface. Image: Latissimus dorsi muscle (highlighted in green) - posterior view The latissimus dorsi attachment on the intertubercular sulcus extends farther superiorly than does the attachment of the teres major on the lateral lip of the sulcus. ![]() As the muscle fibers extend toward the axilla, the fibers wind around the anterior aspect of the teres major muscle to insert as a flat tendon on the floor of intertubercular (bicipital) groove of humerus.The muscle fibers are situated in various orientations with the uppermost fibers almost horizontally oriented and the lower fibers much more vertically oriented on the thorax. ![]()
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