Flashcards in Anterior Abdominal Wall and Inguinal Region Deck (41):
What are the abdominal horizontal planes and the vertebral levels they go through?
Tits Sag Too True
-Transpyloric just under T12/aboveL1
-Subcostal through L3
-Transumbilical on top of L4
-Transtubercular on bottom of L5 through the iliac tubercles
What do we find in the upper right quadrant?
gallbladder, duodenum, right pleura, liver (right lobe), and right kidney
Upper left quadrant contents
spleen, stomach, left pleura, tail of pancreas, left kidney
Right lower quadrant
right ureter, cecum, ileal diverticulum, vermiform appendix
Left lower quadrant
left ureter, descending sigmoid colon
What makes up the superficial inguinal ring?
external abdominal oblique m.
What two things to the inguinal ligament attach to?
Asis and the pubic tubercle
What is the sharp extension of the inguinal ligament?
The lacunar ligament
What is the lateral-posterior extension of the lacunar ligament that runs along the pectineal line?
The pectineal ligament
What 2 muscles join up to make the conjoint tendon?
Internal oblique and transversus abdominis
Where does the cremaster m. originate from?
the internal oblique m.
between what 2 muscles do the nerves and the vessels run?
internal oblique and transvers abdominis
which superficial fascia layer is the fatty one?
Which superficial fascia layer is the membranous one?
-continuous with fascia lata in the thigh
Which superficial layer of the anterior abdominal wall do the blood vessels run in?
ALLEGEDLY SUPER IMPORTANT! Which of the superficial layers of the anterior abdominal wall is continuous over the penis and the scrotum?
Where is the potential space that fluid can leak into on the anterior abdomen?
between the scarpa's and deep fascia of the external abdominal oblique m.
from superficial to deep, put these muscles in order: External oblique, transversus abdominis, rectus abdominis, and internal oblique
External, internal, transverse, then rectus abdominis (with pyramidalis)
What is the arcuate line?
1/2 way between umbilicus and pubic symphiysis
-under this, the rectus abdominis doesn't have a back sheath
Where does the deep abdominal artery system arise from?
Subclavian Superiorly and external iliac inferiorly
Where does the superficial artery system arise from?
perforating branches superiorly and branches from femoral A. inferiorly
With the veins, what are some things that do deep drainage?
lumbar and intercostal v.
things contributing to superficial drainage
*** within CAMPER's fascia
What are the sensory dermatomes of this region?
T7 is xiphoid
T10 is umbilical
L1 is inguinal fold
What nerve comes off of the lumbar plexus and comes from L1 and sometimes T12?
Which nerve comes out under the iliohypogastric n.?
-this one enters and exits the inguinal canal
Which nerve is the only one that comes out on top of Psoas Major m.
-gives off genital branch and femoral branch
Which branch of gen fem n. enters and exits the inguinal canal?
Which branch of gen fem exits inferior to the inguinal ligament?
For the lymphatics, describe the superficial drainage pattern
to anterior axillary or sternal nodes or to superficial inguinal nodes
Describe the deep lymphatic drainage
everything to the deep abdominal nodes
What 3 muscle do we go through if we poke through the inguinal canal (in order starting from deep ring)
transversus abdominis, internal oblique, external oblique
What are the inguinal canal contents for a male?
ductus deferens, ilioinguinal n., genital branch of gen fem n, testicular a. and pampiniform plexus of veins
-all of this is surrounded by fascial layers
what are the inguinal canal contents for a female?
round ligament of uterus, ilioinguinal n., genital branch of gen fem n,
Whate embryologic layer do the testes come from?
the urogenital ridge of the MESODERM
When the testicles descend, they bring a bunch of shit with them, but what is the one structure that gets left behind?
Transversus abdominis muscle
where does dartos come from superiorly?
where does external and internal spermatic fascia come from?
external oblique and transversalis fascia respectively
where does the cremaster muscle and the tunica vaginalis come from?
the internal abdominal oblique and the peritoneum respectively
What landmark do we use to determine if an inguinal hernia is direct or indirect?
inferior epigastric vessel
-direct is medial and indirect is lateral THROUGH the actual inguinal canal