latissimus dorsi (muscle)

(redirected from broadest muscle of back)

la·tis·si·mus dor·si (mus·cle)

[TA]
thoracoappendicular muscle (superficial muscle of back); origin, spinous processes of lower five or six thoracic and the lumbar vertebrae, median ridge of sacrum, and outer lip of iliac crest; insertion, with teres major into posterior lip of bicipital groove of humerus; action, adducts arm, rotates it medially, and extends it; nerve supply, thoracodorsal.