Fill in the Blanks Muscles: Origin and InsertionOnline version Fill in the blank with the correct answer. by Madison Fowler 1 5 trochanter iliac spine coracoid 11 crest processes scapula 11 2 tract increase iliotibial 2 abducting 1 12 spinous forward abduction decrease process greater sacrum 1 12 laterally 3 The origin of the External Intercostal muscles are ribs - . The insertion of the External Intercostal muscles are ribs - . The action of the External Intercostal muscles is to the size of the thorax . The origin of the Internal Intercostal muscles are ribs - . The insertion of the Internal Intercostal muscles are the ribs - . The action of the Internal Intercostal muscles is to the size of the thorax . The origin of the Pectorialis Minor are the ribs - . The insertion of the Pectorialis Minor is the on the scapula . The action of the Pectoralis Minor is to pull the shoulder girdle . The origin of the Rhomboid Minor are the C7 - T1 . The insertion of the Rhomboid Minor is the of the scapula . The action of the Rhomboid Minor is rotate the medially . The origin of the Tensor Fasciae Latae is the . The insertion of the Tensor Fasciae Latae is the . The action of the Tensor Fasciae Latae is to assist in the of the hips . The origin of the Piriformis is the anterior surface of the . The insertion of the Piriformis is the of the femur . The action of the Piriformis is to assist in the hips .