serratus anterior (muscle)


ser·ra·tus an·te·ri·or (mus·cle)

[TA] thoracoappendicular (scapulothoracic) muscle; origin, from center of lateral aspect of first eight to nine ribs; insertion, superior and inferior angles and intervening medial margin of scapula; action, rotates scapula and pulls it forward, elevates ribs; nerve supply, long thoracic from brachial plexus. Synonym(s): musculus serratus anterior [TA], anterior serratus muscle, costoscapularis, musculus serratus magnus