Posterior Abdominal Wall Flashcards
What is the origin of psoas major?
lumbar vertebrae from inferior border of T12-superior border of L5
medial ends of transverse processes
What is the insertion of psoas major?
lesser trochanter (femur) w/iliacus (conjoin iliacopsoas tendon)
What structures lie posterior to psoas major?
lumbar veins and arteries to abdominal walls
Where is the lumbar plexus?
ventral rami L1-L4 within posas major
nerves to abdomen and lowe limb
What structures lie anterior to psoas major?
sympathetic trunks
psoas minor (2/3)
What is the origin of quadratus lumborum?
tips of transverse processes (L5?)
top of posterior iliac crest
What is the insertion of quadratus lumborum?
inferior surface of 12th rib (stablizes it)
What is the origin of iliacus?
iliac fossa
The posterior lamina of the thoracolumbar fascia extends from
tips of the spinous processes
from sacrum to neck
The middle lamina of the thoracolumbar fascia extends from
medial tip of transverse processes
The anterior lamina of the thoracolumbar fascia extends from
the anterior surface of the tips of the transverse processes
The posterior compartment of the thoracolumbar fascia contains
erector spinae
The anterior compartment of the thoracolumbar fascia contains
quadratus lumborum
What is a psoas abscess?
- TB osteomyelitis from lumbar VC entering psoas
- pus can’t burst through fascia, remains in psoas envelope
- tracks down posterior abdominal wall beneath inguinal ligament
What are the sites of narrowing along the ureter?
narrowing of renal pelvis to form ureter
tipping over pelvic brim to travel on lateral pelvic walls
entering the bladder
potential sites of impaction or ubstruction by renal/kidney stones
