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Posterior Abdominal Wall
Cole 4/15/11 lecture 1 hr
23
Anatomy
Undergraduate 4
03/21/2011

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Term
T12-L5
ilium: iliac crest, iliac fossa, anterior superior iliac spine
Definition
what vertebrae & bones form the posterior abdominal wall?
Term
rib 12 where the quadratus laborum attaches to assist with respiration(inspiration)
Definition
what rib + (transverse process of lumbar vertebrae) has muscle attachment in the abdomen?
Term
unilateral: lateral trunk flexion
bilateral: excercise-inspiration assistance
Definition
what are the funtions of q. laborum?
Term
above: q. laborum
below: illiacus (anterior to q laborum)
Definition
what muscle is above the iliac crest and attaches to it? what muscle is below?
Term
iliac fossa to lesser trochanter of femur, it flexes the hip
Definition
where does the illiacus originate? insert? what is it's action?
Term
o: transverse process of vertebral bodies
i: with illiacus to lesser trochanter
Definition
where does the psoas muscle originate? insert?
Term
1) psoas fascia around the psoas
2) quadratus fascia around q lumborum
3) thoracolumbar fascia around epaxial back muscles
Definition
describe the fascia of the muscles in the posterior abdominal wall
Term
transversus spinalis: multifidus
erectorspinae: longissimus & ileocostalis
Definition
what muscles are found in the thoracolumbar fascia?
Term
1) median arcuate ligament
2) medial arcuate ligament
3) lateral arcuate ligament
Definition
from the midline outward, list the ligaments that anchor the diaphragm posteriorly
Term
median arcuate
Definition
through which diaphragm ligament does the aorta and thoracic duct pass?
Term
medial arcuate
Definition
near which diaphragmatic ligament does the psoas muscle attach?
Term
lateral arcuate ligament
Definition
near which diaphragmatic ligament does quadratus laborum attach?
Term
l is higher and shorter (L1-L2)
r is lower and longer (L1-L3)
Definition
at what spinal level are each of the crux of the diaphragm?
Term
subcostal(T12)
iliohypogastric(L1)
ileoinguinal(L1)
genitofemoral(L1-2)
lateral femoral cutaneous(L2-3)
femoral(L2-4)
obturator(L2-4)
lumbosacral trunk(L4-L5)
Definition
list the nerves of the lumbosacral plexus (T12 & down) and their spinal levels
Term
1)somatic motor
2)somatic sensory (to skin + p. peritoneum)
3)autonomics(sympathetics to body wall)
Definition
what is found in ventral rami of spinal nerves?
Term
subcostal
Definition
what nerve comes out below the 12th rib near the arcuate ligaments?
Term
superior: ilio hypogastric
inferior: ilio inguinal
Definition
which branch the nerve off L1 stays superior to the iliac crest? which goes inferior by crossing in front of it?
Term
genitofemoral

genito branch - sensory: skin on upper thigh
femoral branch - motor to: cremaster muscle
Definition
which nerve comes out through the iliopsoas muscle? what does it innervate?
Term
lateral femoral cutaneous
sensory only to large lateral area of thigh
Definition
what nerve comes out behind psoas and comes out in front of iliacus then goes anterior to the ilioinguinal ligament? what does it innervate?
Term
femoral
anterior compartment (quads) knee extensor
also becomes sural nerve in calf
Definition
what nerve is as big as your little finger and emerges between psoas and iliacus the passes poeterior to the ilioinguinal ligament? what does it innervate?
Term
obturator nerve (goes through obturator foramen)
Definition
what nerve innervates the adductor compartment of the thigh and can only be seen if the psoas muscle is chopped out because it runs posterior to it?
Term
lumbosacral trunk L4-L5
Definition
what nerves become the sciatic nerve?
Term
lateral to the crura of the diaphragm, and in front of the transverse process

it runs medial to the lumbosacral plexus
Definition
where does the sympathetic trunk enter the abdomen from the thorax?
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