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Hernias
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- Surround, and support abdominal contents
Skin
- Segmental nerve supply from spinal roots
Muscles
- External Oblique
- lower 8 ribs, → iliac crest, linea alba.
- Fibres down and medial
- Internal Oblique
- inguinal ligament, iliac crest, thoracolumbar fascia → inferior
costal margin
- Tranversus abdominis
- inguinal ligament, lumbar fascia, lower 6 costal cartilages
- horizontally
- Rectus Abdominis
- runs in rectus sheath vertically
Peritoneum
Sites of weakness
- Deep inguinal ring
- Transversalis fascia in posterior wall of inguinal canal
- Femoral canal
- Umbilical orifice
- Para-umbilical
- Epigastric
- Incisional
- Lateral border of rectus sheath (Spigelian)
- Grynfeltt's space (lumbar, below 12th rib)
- Petit's triangle (lumbar, just above iliac crest
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