2
LumbarRegionofBack:CrossSection
Plate176
Cross-SectionalAnatomy
Abdominal aorta
Inferior vena cava
Pancreas
Anterior longitudinal ligament
Crura of diaphragm
Superior mesenteric artery and vein
Mesentery
Duodenojejunal
junction
Body of
L2 vertebra
Psoas major
muscle
and fascia
Lumbar
spinal nerve
Transverse
process
Spinal
dura mater
Cauda
equina
Spinous process
of L1 vertebra
Supraspinous ligament
Erector spinae and multifidus muscles
Thoracolumbar fascia (posterior layer)
Thoracolumbar fascia (middle layer)
Thoracolumbar fascia (anterior layer—
quadratus lumborum fascia)
Descending (2nd) part of duodenum
Kidney
Renal fascia (anterior and posterior layers)
Perirenal fat
Pararenal fat
Peritoneum
Extraperitoneal
(subserous) fascia
(areolar tissue)
Transversalis
fascia
External
oblique
muscle
Internal
oblique muscle
Transversus abdominis
muscle
Tendon of origin of
transversus abdominis and
internal oblique muscles
Serratus posterior inferior muscle
Latissimus dorsi muscle
Quadratus lumborum muscle
