Posterior Ab Flashcards
Psoas general path
Behind medial arcuate ligament of diaphram, inserts onto the anterior thigh
Action of the psoas muscle
Flexion of the thigh (or vertebral column if legs are fixed)
Difference between psoas major/minor
Minor does NOT extend into the thigh
What muscle fills the area of the posterior abdominal wall deep/lateral to psoas major, between rib 12 and iliac crest?
Quadratus lumborum muscle
Action of quadratus lumborum
Depress/stabilize rib 12, weak lateral flexor of torso
Path of iliacus muscle
Deep surface of ilium to join the psoas muscle inserting onto the lesser trochanter of the femur
Regions of the diaphragm
Sternal, costal, lumbar
Joining of the left and right crura of the diaphram
MediaN arcuate ligament
What allows the aorta and thoracic duct to pass thru the diaphragm?
aortic hiatus (median arcuate ligament) and T12
Where is the esophageal hiatus?
In the right crus at T10
Passage for the psoas muscles, sympathetic trunk, and least splanchnic nerve
MediaL arcuate ligament
Passage of the quadratus lumborum
Lateral arcuate ligament
Passage of the IVC
Opening in the central tendon at T8 called caval foramen
Blood supply to the inferior aspect of the diaphragm
Inferior phrenic arteries
Blood supply specific to the superior aspect of the diaphragm
Pericardiophrenic, musculophrenic arteries
Lines the internal abdominal wall and inferior aspect of the diaphragm
Transversalis Fascia
3 Fascias of the thoracolumbar fascia
Quadratus lumborum, Psoas, Iliac
At what level does the aorta bifurcate into the iliac arteries?
L4
Visceral branches of the aorta
Celiac, Superior/Inferior mesenteric artery, Renal, Middle suprarenal, Gonadal
Parietal branches of the aorta
Inferior phrenic, 4 lumbar arteries, median sacral(unparied)
Level of celiac trunk and area it supplies
T12: spleen, stomach, part of pancreas, duodenum, gallbladder, liver
Level of superior mesenteric artery and area it supplies
L1: part of pancreas, small intestine, cecum, appendix, ascending colon, right half of transverse colon
Level of inferior mesenteric artery and the area it supplies
L3: Left half of transverse colon, desecnding colon, sigmoid colon, superior part of rectum
Level renal arteries arise
L1-L2
Level middle suprarenal arteries arise
L1
Level Gonadal arteries arise
L2
Where do the right and left common iliac veins join to form the IVC?
L5
The IVC and the aorta lie on which sides of the body?
IVC: Right side, Aorta: left side
Symptoms of nutcracker syndrome
Left flank pain, hematuria, left testicular pain or LLQ pain (female), can have enlargement of the paminiform plexus in the scrotum is far enough along
Pathology of nutcracker syndrome
Left renal entrapment between the AA and the SMA, leading to renal hypertension and a rupture of thin-walled veins in the kidney
Lymph on the anterior surface of the aorta at the celiac trunk/SMA/IMA, recieves from te abdominal viscera
Preaortic lymph
Lymph on the sides of the aorta, receives from lower limbs/pelvis, reproductive organs, kidneys/adrenals, abdominal wall
Para-aortic lymph
Saccular dilation formed by the joining of the right and left lumbar lymphatic trunks
Cisterna chyli_is the beginning of the thoracic duct
Ventral ramus of T12
Subcostal nerve
Major plexus for innervation of pelvis and lower limb
Lumbar plexus
Path of illioinguinal nerve
Off of L1, anterior surface of quad lumbo, to iliacus, pierces TA/IO anteriorly to enter the inguinal canal, then thru the superficial inguinal ring (NO deep inguinal ring)
Branches of liliohypogastric
Lateral cutaneous (posterolateral gluteal skin) and anterior cutaneous (skin over pubic region)
Genitofemoral nerve path
L1/2, pierces psoas, then anterior surface posterior to ureter, divides into genital and femoral
Obturator nerve path
L2-L4, medial bordr of psoas major (pelvic brim), runs with common iliac vessels, then thru the obturator foramen into medial compartment of thigh, divides into anterior/posterior obturators
Femoral nerve path
L2-L4, lateral border of psoas major (anterior to iliacus), runs along the border between the psoas major/iliacus, passes posterior to the inguinal ligament entering the anterior thigh compartment
Branches of the femoral nerve
Cutaneous (medial and intermediate), motor (iliacus, pectineus, sartorius, quad femoris), hip/knee branches
Rough vertebral level of kidneys
T12-L3
Which kidney is higher?
Left kidny
What muscle is next to the right kidney?
Quadratus lumborum, TA
Anterior contacts to right kidney
right suprarenal gland, descending part of duodenum, right colic flexure
Anterior contacts to left kidney
Left suprarenal gland, pancreas, left colic flexure
Anterior to posterior hilar structures
Renal vein, artery, pelvis
What surrounds the parenchyma of the kidney?
Fibrous capsule
Collection of fat outside of the capsule of the kidney, that is also present in the renal sinus
perirenal fat
Fascia that encloses the fat and capsule of the kidney
Renal fascia
How are the kidneys attached to the body?
Attached to the diaphragm, but open inferiorly
Fat between the renal fascia and peritoneum
PARArenal fat
Blood supply to the ureters
Ureteric branches off of the renal arteries
Path of ureters
Desecnd anterior to psoas, cross iliac artery anteriorly, over the pelvic brim
Shape of right suprarenal gland
Pyramid
Shape of left suprarenal gland
Flat and semilunar
Blood supply to suprarenal glands
Superior/middle/inferior suprarenal arteries