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latissimus dorsi (muscle)

 

Definition: 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.

Synonym(s): musculus latissimus dorsiTA, broadest muscle of back

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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