Aspect | Attachment | Innervation |
---|---|---|
Anterior | The Linea Alba Fibres of Rectus Abdominis | Lower intercostal nerves |
Lateral | The aponeurosis of the three flat muscles (external oblique, internal oblique, and transversus abdominis) | Lower intercostal nerves, Obliquus internus and Transversus also receive filaments from the anterior branch of the iliohypogastric and sometimes from the ilioinguinal nerves |
 | Anterior costoxiphoid ligament | Lower intercostal nerves |
Posterior | Posterior costoxiphoid ligament | Lower intercostal nerves |
 | Fibres from the diaphragm | Phrenic (C3,4,5), lower intercostal nerves |
 | Fibres from Transverse thoracis | Lower intercostal nerves |