Posterior abdominal wall Flashcards
Attachments of quadratus lumborum
12th rib and transverse processes of L1-4
to
iliac crest
action of quadratus lumborum
lateral flexion
and
support of abdominal wall
and
forced expiration (bilateral use)
Innervation of quadratus lumborum
T12 - l4 ant rami
attachments of iliacus
iliac fossa of pelvis
joins w/ psoas - iliopsoas
lesser trochanter of femur
innervation of iliacus
femoral nerve
actions of psoas
hip flexion
lateral bending of trunk (one)
raise trunk from supine (both)
innervation of psoas
lumbar plexus - direct branches from L2-4
what is the link between psoas and diaphragm
the fascia over the psoas is thickened near the diaphragm to form the medial arcuate ligament
attachment levels of right and left crus
right - bodies of L1-3
left - bodies of L1-2
at which level does the IVC form
L5 - left and right common iliac veins unite
which structures does the IVC drain
posterior abdominal wall, diaphragm, kidneys, and suprarenal glands
describe the common arrangement of lumbar vein drainage
1&2 into ascending lumbar
3&4 into IVC
5th into iliolumbar vein
Describe the difference between right and left gonadal vein drainage
right - direct to IVC
left - left renal vein
What are the nerve roots of the pelvic splanchnic nerves
S2,S3,S4
where is the superior hypogastric plexus found
around the bifurcation of aorta
where are the inferior hypogastric plexuses found
lateral pelvic walls
name the nerves if the lumbar plexus from superior to inferior
iliohypogastric
ilioinguinal
genitofemoral
lateral femoral cutaneous
femoral
obturator
what structures does ilioinguinal innervate
internal oblique and transversus abdominis (w/ iliohypogatsric)
cutaneous to medial thigh, perineum
and
root of penis/scrotum in males
mons pubis/labium majus in females
what nerve roots is genitofemoral derived from
L1, L2
what does the femoral branch of genitofemoral innervate
sensory to superoanterior aspect of thigh
what does the genital branch of genitofemoral innervate
sensory to perineum
motor to cremasteric muscle
Nerve roots of lateral cutaneous nerve of the thigh
L2 and L3
what is the saphenous nerve a branch of and what does it supply
femoral nerve
branch to medial side of leg (sensory)
