Anatomy Flashcards
What are the contents of the inguinal ligament
round ligament ilioinguinal nerve genital branch of the genitofemoral nerve
What is the origin and insertion of the inguinal ligament
ASIS to pubic tubercle
Where is the anatomical landmark for the deep inguinal ring
halfway between ASIS and pubic tubercle
Where is the anatomical landmark for the superficial inguinal ring
superior to the pubic tubercle
What are the groin contents
lateral to medial Femoral.. Nerve Artery Vein Empty space Lymphatics
Greater omentum borders
greater curvature of the stomach transverse mesocolon - hepatic and splenic flexure
Where does the ilioinguinal nerve arise from?
L1
Where does the genitofemoral nerve arise from?
L1-2
Boundaries of the femoral triangle
Superior border – Formed by the inguinal ligament, a ligament that runs from the anterior superior iliac spine to the pubic tubercle. Lateral border – Formed by the medial border of the sartorius muscle. Medial border – Formed by the medial border of the adductor longus muscle. The rest of this muscle forms part of the floor of the triangle. It also has a floor and a roof: Anteriorly, the roof of the femoral triangle is formed by the fascia lata. Posteriorly, the base of the femoral triangle is formed by the pectineus, iliopsoas and adductor longus muscles.
Contents of the femoral triangle
Femoral sheath with: Femoral nerve Femoral artery Femoral vein - from which the great then Femoral canal Empty space Lymphatic nodes and vessels (Superficial inguinal LN)
Where does the femoral artery cross the inguinal ligament
The femoral artery crosses exactly midway between the pubic symphysis and anterior superior iliac spine (known as the mid-inguinal point).
What is a femoral hernia
In the case of femoral hernia, part of the bowel pushes into the femoral canal, underneath the inguinal ligament. This manifests clinically as a lump or bulge in the area of the femoral triangle. It usually requires surgical intervention to treat.
Where do you find the deep inguinal lymph nodes? Name of one?
under the inguinal ligament - the most superficial being Cloquet node
Branches of the abdominal aorta
the abdominal aorta has: 3 single anterior visceral branches (coeliac, superior mesenteric artery, inferior mesenteric artery) 3 paired lateral visceral branches (suprarenal, renal, gonadal) 5 paired lateral abdominal wall branches (inferior phrenic and four lumbar) 3 terminal branches (two common iliac arteries and the median sacral artery)
Where is the internal epigastric artery located?
The IEA can be 4 to 8 cm from midline regardless of body fat habitus or levels
Mnemonic for abdominal aorta
I - Inferior phrenic (parietal) Can - Coeliac Move - Middle suprarenal Somewhere - Superior mesenteric Really - Renal Lovely (and) - Lumbar x 4 pairs (parietal) Glorious - Gonadal In - Inferior mesenteric March - Median sacral (parietal) Terminal branches are the common iliacs
Path of the right renal artery
Runs behind the IVC
What is the median umbilical ligament
It is what the urachus becomes following birth. ligament from the apex of the bladder to the umbilicus
What is the medial umbilical ligament
Also called obliterated umbilical artery
Where is the arcuate line?
1/2 of the distance from the umbilicus to the pubic crest
What happens at the arcuate line?
It is the site of entry of the inferior epigastric artery in to the rectus sheath.
Also the site of weakness - spigelian hernia
What is the ileopubic tract
The ileopubic tract is a thickening of the transversalis fascia just behind the site of the inguinal ligament. it arches over the external iliac vessels. Important landmark in laparoscopic hernia repair.
Where would you find the deep inguinal ring?
The round ligament of the uterus enters the inguinal canal
When does the rectum become the anus
As it passes through the levator ani
Where do the cardinal ligaments originate and insert
From the cervix laterally to the pelvic side wall in the area of the obturator fascia.
What are the supporting structures of the bladder
Lateral ligament of the bladder - lateral bladder to the wall of the pelvic cavity. Contains neurovascular structures
Medial pubovesical liagment - from the neck of the bladder anteriorly to the arch of the pubis.
Median umbilical ligament - remnant of urachus. from top of bladder to the umbilicus
Medial umbilical liagment - obliterated umbilical artery. runs laterally along umbilical prevesical fascia
Umbilical prevesical fascia - from the MUL to the corresponding ligament on the other side.
Median sacral artery
Unpaired
Runs in the midline in the “presacral space” - between the presacral fascia and the rectal and rectosacral fascia
Also runs with a vein
Where does the external iliac artery run?
Arises from the Common iliac artery
Runs under the inguinal ligament and changes its name to the femoral artery here.
What is the deep circumflex iliac artery
It is the first branch of the external iliac artery
Arises just before the EIA runs under the inguinal ligament
Courses laterally and curves posteriorly to supply the ilium and iliacus muscles in the iliac fossa
Paired with deep circumflex iliac vein
What is the second branch of the External iliac artery
Inferior epigastric artery
What is the route of the inferior epigastric artery?
Arises from the external iliac artery (2nd branch) at roughly the same place as the circumflex iliac artery
It goes superomedially, anterior to the transverse fascia up towards the rectus abdominis.
Supplies the rectus abdominis muscle.
Gives off a small branch - called pubic branch of IEA which anastamoses with the obturator artery to supply the medial compartment of the thigh.
What are the branches of the Internal iliac artery?
1st - umbilical artery
2nd - obturator artery
3rd - uterine artery
4th - Middle rectal artery
What does the umbilical artery do?
What does the obturator artery do?
supplies the medial compartment of the thigh
Passes though the obturator canal
(the pubic branch of the inferior epigastic artery can anastamose with it)
Where does the uterine artery travel?
Third branch of the Internal iliac artery
Runs in the cardinal ligament and divides to supply the upper reproductive tract.
Where does the middle rectal artery run?
4th branch of the IIA
Runs inferiorly to reach the middle third of the rectum and anastomoses with the superior and inferior rectal arteries.