costoscapularis

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.

costoscapularis

/cos·to·scap·u·lar·is/ (-skap″u-la´ris) the serratus anterior muscle.