Abdomen 2 Part 2 Flashcards
Posterior abdomin wall
-structures posterior to parietal peritoneum
-thoracolumbar fascia`
thoracolumbar fascia
extensive connective tissue complex with anterior, middle, and posterior layers enveloping muscles
muscles of the posterior abdomen wall
-psoas major
-psoas minor
-iliopsoas
-quadratus lumborum
innervation of psoas major
anterior rami of nerves L1, L2, and L3
innervation of iliacus muscle
Femoral nerve (L2-L4)
Innervation of quadratus lumborum muscle
anterior branches of T12 an d L1-L4 nerves
Diaphragm
musculotendinous partition separating thoracic and abdominal cavities consisting of right and left domes
sternal part of diaphragm
attaches to the xiphoid process
costal part of diaphragm
attaches to costal margins of ribs 6-10 and ribs 11 and 12
lumbar part of diaphragm
attaches medial and lateral arcuate ligaments
central tendon of the diaphragm
thin but strong aponeurosis
crua of diaphragm
musculotendinous bundles that arise from L1-L3 and united anteriorly by median arcuate ligament
caval opening in central tendon
passage for inferior vena cava and phrenic nerve
esophageal hiatus of right crus
where esophagus and vagl trunks pass through
aortic hiatus
where aorta, azygous vein, an thoracic duct pass through diaphragm
I 8 10 eggs at 12
-inferior vena cava at T8
-esophagus at T10
-aorta at T12
Diaphragm blood supply
-pericardiacophrenic and musculophrenic arteries of the internal thoracic arteries
-superior phrenic arteries of thoracic aorta
-inferior phrenic arteries of the abdominal aorta
Diaphragm blood drainage
-pericardiacophrenic vein and musculophrenic vein empties into internal thoracic vein
-superior and inferior phrenic vein empty into inferior vena cava
innervation of the diaphragm
-motor by right and left phrenic nerves from C3-C5
-sensory through intercostal and subcostal nerves
innervation of external oblique, internal oblique, traverse abdominis, quadratus lumborum, and anterolateral skin
subcostal nerve
innervation of iliopsoas
L1-L3
lumbar plexus
network composed of anterior rami of L1-L4 spinal nerves located behind psoas muscle
lumbar plexus forms
-iliohypogastric and ilioinguinal nerves
-lateral cutaneous nerve
-genitofemoral nerve
iliohypogastric and ilioinguinal nerve
L1, innervates abdominal muscles of skin and pubic/inguinal regions
lateral cutaneous nerve
-L2-L3
-innervates skin of anterolateral thigh
genitofemoral nerve
-L1-L2
-innervates abdominal muscles and skin of genitals and anterior thigh
2 nerves that go through inguinal canal
ilioinguinal nerve and the genital branch off the genitofemoral nerve
blood supply of posterior abdominal wall
-subcostal arteries of thoracic aorta
-4/5 pairs of lumbar arteries of the abdominal aorta
common iliac arteries
terminal branches of abdominal aorta
common iliac arteries bifurcations
-internal iliac arteries
-external iliac iliac arteries
internal iliac arteries supply
supply pelvic structures
external iliac branches
-deep circumflex artery
-inferior epigastric arteries
external iliac arteries supply
anterolateral abdominal wall
drainage of lower limb
-external iliac vein
drainage of the pelvic region
-internal iliac vein
posterior abdominal wall drained by
tributaries of the inferior vena cava
EXCEPT left gonadal vein that empties into left renal vein
right ascending lumbar vein becomes
azygous vein
left ascending lumbar vein becomes
hemiazygous vein
what produces thoracic duct
right and left lumbar trunks adn intestinal lymphatic trunks join at the cisterna chyli
