| Muscle |
Origin |
Insertion |
Action |
| Rectus Abdominis | pubic symphysis | cartilege of ribs and xiphoid process | flexes vertebral column, compresses abdomen |
| External Oblique | ribs | iliac crest | flex and rotate vertebral column, compresses abdomen |
| Internal Oblique | iliac crest | ribs | flex and rotate vertebral column, compresses abdomen |
| Transverse Oblique | iliac crest | xiphoid process, linea alba, pubis | Compresses abdomen |
| Diaphragm | xiphoid process, inferior six ribs, lumbar vertebrae | central tendon | inhalation and exhalation |
| External Intercostals | inferior border of rib above | superior border of rib below | elevate ribs |
| Internal Intercostals | superior border of rib below | inferior border of rib above | draws ribs together |