Psoas Major Relations: In Abdomen And Pelvis

Question 1

Anterior

Answer 1

1. Diaphragm medial arcuate ligament
2. Psoas minor (if present)
3. Kidney and renal vessels
4. Ureter
5. Gonadal vessels
6. Genitofemoral nerve
7. Duodenum 3rd part (on right side) and 4th part on left side
8. Ileum end (on right side) and descending colon (on left side)
9. Inguinal ligament

Question 2

Posterior

Answer 2

1. Lumbar vertebrae transverse processes
2. Lumbar arteries
3. Lumbar nerves forming lumbar plexus are embedded in muscle posterior part
4. Quadratus lumborum medial edge

Question 3

Medial

Answer 3

1. Sympathetic chain along medial margin
2. External iliac vessels
3. Obturator nerve and lumbosacral trunk
4. Aorta medial to left Psoas while IVC medial to right Psoas

Question 4

Lateral

Answer 4

1. Quadratus lumborum lateral to upper part
2. Iliacus lateral to lower part
3. Iliohypogastric nerve
4. Ilioinguinal nerve
5. Femoral nerve
6. Lateral cutaneous nerve of thigh