serratus anterior (muscle)
Definition: 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 anteriorTA, anterior serratus muscle, costoscapularis, musculus serratus magnus
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