Relier Pairs muscles activity Version en ligne activities for key terms over muscles in the body par Cole Helton 1 rhomboid major 2 rectus abdominis 3 psoas major 4 iliacus 5 trapezius 6 quadratus lumborum orgin: occipital bone, external protuberance insertion:clavicle, scapula action:extends and laterally flexes the head and neck orign: hip bone,pubis insertion: sternum, costal cartlidges 5-7 orgin:hip bone, iliac crest, iliolumbar ligament insertion: rib 12, lower border action: acting individually it laterlly flexes the trunk orgin: t2-t5,spinous processes insertion: scapula, medial border action: medially rotates and retracts the scapula orgin: t12- L5 insertion: femur, lesser trochanter action: flexes and abducts the hip and flexes the trunk orgin:hip, iliac fossa insertion: femur, lesser trochanter action:flexes and abducts the hip and flexes the trunk