Pelvic Vessels and Nerves Flashcards
What are the 2 main divisions of the internal iliac A?
Posterior Division
Anterior Division
What does the common iliac A turn into?
External Iliac A
—>femoral A
Internal Iliac A
What branch of the internal iliac A is the same in m and f?
posterior division
List the parts of the posterior division of internal iliac A
Lateral Sacral As
Iliolumbar A
Superior Gluteal A
What A enters and exits the sacral foramina to supply the sacral canal, M and skin posterior to sacrum?
Lateral sacral As
What A is between the obturator N and lumbosacral trunk?
iliolumbar A
What A supplies the iliacus M and lumbar region posterior to psoas major M?
iliolumbar A
What is the terminal branch of the posterior division of the internal iliac A?
superior gluteal A
What A exits the greater sciatic foramen superior to the piriformis and supplies the gluteal region?
superior gluteal A
List the parts of the anterior division of internal iliac A
Umbilical A Superior vesical A Inferior vesical A Middle rectal A Obturator A Internal pudendal A Inferior gluteal A Uterine A
That two As come off the same trunk of the anterior division of internal iliac A?
umbilical A (degen) superior vesical A
What do the umbilical A (degenerates after birth) and superior vesical A supply?
bladder
What A supplies the bladder, seminal vesicle, prostate, ureter and vas deferens?
inferior vesical A
What A supplies the rectum, prostate, seminal vesicle, vas deferens and vagina?
middle rectal A
What leaves the pelvis via obturator canal to enter the medial thigh?
obturator A
What supplies the inferior rectal A and gives branches to the vagina?
internal pudendal A
What A exits the pelvis via greater sciatic foramen, loops around ischial spine and enters perineum via lesser sciatic foramen?
internal pudendal A
What A supplies the gluteal region via the greater sciatic foramen inferior to the piriformis?
inferior gluteal A
What supplies the uterus, vagina and anastomoses with the ovarian A?
uterine A
Do venous plexuses in the pelvis have valves?
NO
What do the venous plexuses in the pelvis communicate with?
each organ has own plexus that communicates with surrounding ones–>all connect with vertebral venous plexus (Batson’s veins)
What do the pelvic veins correspond to (naming wise)?
branches of internal iliac As
What supplies parasymp innervation to pelvic viscera, descending colon, sigmoid colon, rectum and proximal anal canal?
Pelvic Splanchnic N (S2-4)
What plexus supplies the coccygeus muscle, part of levator ani M, and sacrococcygeal joint?
coccygeal plexus (S4-Co)
Where do the anococcygeal N arise?
coccygeal plexus
What N supplies the skin between the tip of the coccyx and anus?
anococcygeal N
What are contained in the pelvic autonomic nerves?
inferior hypogastric plexus
pelvic splanchnic Ns
—>S2-4
What plexus supplies sympathetic innervation to the pelvic viscera?
Inferior hypogastric plexus
What are the branches of the inferior hypogastric plexus in the pelvic viscera themselves?
pelvic plexuses
—>sub-plexuses of inferior hypogastric
What are sub-plexuses associated with in both males and females?
- lateral rectum
- inferolateral urinary bladder
What are sub-plexuses associated with in males?
prostate gland
seminal vesicles
What fibers in the prostatic plexus pierce the pelvic diaphragm to reach erectile tissues?
parasympathetic fibers
What are sub-plexuses associated with in females?
cervix of uterus
lateral fornices of vagina
What plexus is located on the posterolateral wall of the lesser pelvis?
sacral plexus
List the branches of the sacral plexus (all) that exit through the greater sciatic foramen
- Sciatic N (L4-S3)
- Pudendal N (S2-4)
- Superior gluteal N (L4-S1)
- Inferior gluteal N (L4-S2)
What N is inferior to piriformis and supplies posterior thigh, leg and foot?
Sciatic N
–>L4-S3
What N passes b/t piriformis and coccygeus Ms along with the internal pudendal A?
pudendal N
–>S2-4
What N supplies the perineum via lesser sciatic foramen?
pudendal N
–>S2-4
What N passes superior to piriformis to supply gluteus medius and minimus?
Superior gluteal N
–>L4-S1
What N passes superior to the piriformis to supply the gluteus maxius?
inferior gluteal N
–>L4-S2
What receives lymph from posterioinferior pelvic viscera and drains to internal or common iliac nodes?
sacral LN
What receives lymph from sacral, external and internal LNs–>lumbar LN?
common iliac LN
What receives lymph from inferior pelvic vicera, deep perineum and gluteal region?
Internal iliac LN
–>drain into common iliac LN
What receives lymph from inguinal nodes and superior parts of pelvic organs?
External iliac LN
–>drain into common iliac LNs
