Posterior abdominal wall Flashcards
Abdominopelvic cavity..Upper boundary
thoraco-abdominal diaphragm
Abdominopelvic cavity..Lower boundary
pelvic diaphragm
Abdominopelvic cavity..Pelvic inlet
the division between the abdominal and pelvic
cavities
Abdominopelvic cavity..Parietal peritoneum
lines the abdominal wall and the pelvic organs
serving as an additional separation
Diaphragm
Muscular and tendinous separation between the thorax
and abdome
what lines the Diaphragm
peritoneum
what are the 3 openings of the diaphragm :
inferior vena cava T8
esophagus T10
aorta T12
Blood supply of the diaphragm :
superior and inferior phrenic arteries
-musculophrenic arteries
–pericardiophrenic arteries
diaphragm innervation ;
phrenic nerves (C3, 4, 5)
Right phrenic nerve palsy
• Right dome of
diaphragm higher
than left
(usually caused by a mass damaging the phrenic nerve )
Psoas major
Action; flexes hip
Innervated by ventral rami of L1-3
Quadratus lumborum
bending (lateral flexion)
Innervated by ventral rami of T12-L4
Iliacus
Action: flexion of hip
Innervated by femoral nerve
Lumbar plexus
The nerve supply of the posterior abdominal wall, pelvic walls and floor and lower
limb are closely related
(anterior and medial thigh)
sacral plexus
pelvic muscles, gluteal region and posterior lower limb
Iliohypogastric supplies ?(T12-L1)
internal oblique-transversus muscles, skin above pubis (suprapubic)
and gluteal region
Ilioinguinal supplies ;
: internal oblique-transversus muscles, skin over upper medial thigh, anterior
scrotum and labia majora
Genitofemoral supplies
enital branch: supply cremaster and scrotum
femoral branch: skin of the femoral triangle
Lateral femoral cutaneous supplies ?
skin of the anterior and lateral thigh
Femoral supplies :
skin of the anterior thigh, medial part of leg, hip and knee joints. Quadriceps
femoris, pectineus, sartorius muscles
Obturator supplies :
skin on medial side of the thigh, adductor muscles
efferent limb of the cremasteric muscle reflex arc
Genital branch of the genitofemoral nerve supplies the cremaster muscle
afferent limb of the cremasteric reflex arc
Ilioinguinal nerve supplies the upper medial portion of the thigh
what supplies the femoral triangle
Femoral branch of the genitofemoral nerve
what artery supplies the pelvis and gluteal region
Internal iliac artery
where does the internal iliac veins receive blood from ?
pelvic organs, pelvic wall and gluteal region
where does the external iliac vein receive blood from :
the lower anterior abdominal wall and lower limb
where does the IVC directly receive blood from :
– lumbar – right inferior phrenic – renal – right suprarenal – right gonadal – hepatic – common iliac veins
where does the IVC indirectly receive blood from :
– left inferior phrenic (via renal veins) – femoral and lower limb veins (via external iliac) – anterior abdominal wall (via external iliac) – pelvic organs (via internal iliac) – left gonadal (via left renal) – left suprarenal (via renal)
Azygos system of veins
Receives blood from the posterior walls of
the thorax and abdomen into the superior vena
cava
Internal thoracic veins
continuous with superior and inferior epigastric
veins and thus connects external iliac vein
with subclavian vein on to right atrium eventually
Axillary vein
superficial epigastric veins anastomose with
thoraco-epigastric veins which drain into the axillary
vein which becomes subclavian, brachiocephalic to
form superior vena cava with brachiocephalic vein
from contralateral side
lymphatic drainage of abdomen and pelvis
-posterior abdominal
wall drain into the lumbar nodes
-drain into the cisterna chy
cisterna chyli
a large
fluid filled sac which collects lymph of the entire lower
part of the body
