Muscular SystemOnline version Anatomy by Grecia Gonzalez 1 Gluteus Maximus 2 Vastus Medialis 3 Pectoralis Minor 4 Trapezius 5 Rectus Abdominis 6 Diaphragm Origin; Ilium (posteriorly later) Insertion; Femur (gluteal tuberosity) I.T. Band Action; Extension (angle increases); abduction Origin; most medial. Femur (linea alba) note: one of the quadriceps Insertion; Tibia (tuberosity via patella tendon) Action; Extension (knee) Origin; Ribs 3-5 Insertion; Scapula (coronoid process) Action; Depression and abduction (scapula) Origin; Occipital bone (external protuberance) Nuchal ligament C7-T2 Insertion; Clavicle scapula Action; Upper... extension and lateral flexion (head/neck) Middle/lower... elevation and retraction (scapula) Origin; Hip bone: pubis Insertion; Sternum: xiphoid process. Costal cartilages 5-7 Action; Flexes the vertical column and increases intra-abdominal pressure. Origin; Sternal part: xiphoid process. Costal part: ribs 6-12. Lumbar part; L1-L3: bodies Insertion; Central tendon Action; contracts and flattens
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