has muscle origin has muscle origin has muscle insertion has muscle insertion humerus muscle of shoulder rib furcula muscle of pectoral girdle carina of sternum supracoracoideus muscle of wing http://upload.wikimedia.org/wikipedia/commons/0/02/Wing_Muscles%2C_color.svg pectoralis minor levator of the wing A muscle in the bird's thorax region that originates from carina of the sternum, furcula, and sternal ribs and inserts onto proximal dorsal surface of the humerus. It acts as a primary elevator of the wing in upstroke. [Manual of Ornithology: Avian Structure and Function, by Proctor and Lynch, 1998]. UBERON:0011605