Abdominal wall
Overview of the abdominal muscles
 | |
Diagram illustrating cross sectional anatomy of the abdominal wall
 | |
Extent of the anterior abdominal muscles
| Muscle | Origin | Insertion |
|---|---|---|
| External oblique | Lower 8 ribs (7-12) | Xiphoid process Linea alba Pubic crest Pubic tubercle Iliac crest |
| Internal oblique | Lumbar fascia Iliac crest Lateral 2/3 inguinal ligament | Lower 3 ribs (10-12) and costal cartilages Xiphoid process Linea alba Pubic symphysis |
| Transversus abdominus | Lower 6 costal cartilages Lumbar fascia Iliac crest Lateral 1/3 inguinal ligament | Xiphoid process Linea alba Pubic symphysis |
| Rectus abdominus | Pubic Symphysis Pubic crest | 5th-7th costal cartilages Xiphoid process |
Nerve supply of anterior abdominal muscles
| Muscle | Nerve Supply |
|---|---|
| External Oblique | Thoracoabdominal nerves (T7-11) Subcostal nerve (T12) |
| Internal Oblique | Thoracoabdominal nerve (T6-T11) Subcostal nerve (T12) Iliohypogastric nerve (L1) Ilioinguinal nerve (L1) |
| Transversus abdominus | Thoracoabdominal nerve (T6-T11) Subcostal nerve (T12) Iliohypogastric nerve (L1) Ilioinguinal nerve (L1) |
| Rectus abdominus | Segmentally by thoracoabdominal nerves (T7 to T11) |
Arrangement of the abdominal obliques
Diagram illustrating external oblique lateral view
 | |
Diagram illustrating internal & external oblique
 | |
On the left side the external oblique has been removed to reveal the internal oblique below
Diagram illustrating transversus abdominus anterior and lateral views
 | |
 | |
Diagram illustrating rectus abdominus
 | |