Origin : spinous processes of T7 through L5, posterior surface of sacrum, iliac crest, lower three ribs Insersion : Medial floor of bicipital groove of Action : shoulder extension, adduction, medial rotataion, hyperextension Nerve : Thoracodorsal nerve Function : 광배근 + 대원근 + 대흉근과 함께 팔의 depression을 도움 Uprise muscle, 수영시 물 끌어당길 때
