Pelvic Vessels and Nerves

Question 1

What are the 2 main divisions of the internal iliac A?

Answer 1

Posterior Division

Anterior Division

Question 2

What does the common iliac A turn into?

Answer 2

External Iliac A
—>femoral A

Internal Iliac A

Question 3

What branch of the internal iliac A is the same in m and f?

Answer 3

posterior division

Question 4

List the parts of the posterior division of internal iliac A

Answer 4

Lateral Sacral As
Iliolumbar A
Superior Gluteal A

Question 5

What A enters and exits the sacral foramina to supply the sacral canal, M and skin posterior to sacrum?

Answer 5

Lateral sacral As

Question 6

What A is between the obturator N and lumbosacral trunk?

Answer 6

iliolumbar A

Question 7

What A supplies the iliacus M and lumbar region posterior to psoas major M?

Answer 7

iliolumbar A

Question 8

What is the terminal branch of the posterior division of the internal iliac A?

Answer 8

superior gluteal A

Question 9

What A exits the greater sciatic foramen superior to the piriformis and supplies the gluteal region?

Answer 9

superior gluteal A

Question 10

List the parts of the anterior division of internal iliac A

Answer 10

Umbilical A
Superior vesical A
Inferior vesical A
Middle rectal A
Obturator A
Internal pudendal A
Inferior gluteal A
Uterine A

Question 11

That two As come off the same trunk of the anterior division of internal iliac A?

Answer 11

umbilical A (degen)
superior vesical A

Question 12

What do the umbilical A (degenerates after birth) and superior vesical A supply?

Answer 12

bladder

Question 13

What A supplies the bladder, seminal vesicle, prostate, ureter and vas deferens?

Answer 13

inferior vesical A

Question 14

What A supplies the rectum, prostate, seminal vesicle, vas deferens and vagina?

Answer 14

middle rectal A

Question 15

What leaves the pelvis via obturator canal to enter the medial thigh?

Answer 15

obturator A

Question 16

What supplies the inferior rectal A and gives branches to the vagina?

Answer 16

internal pudendal A

Question 17

What A exits the pelvis via greater sciatic foramen, loops around ischial spine and enters perineum via lesser sciatic foramen?

Answer 17

internal pudendal A

Question 18

What A supplies the gluteal region via the greater sciatic foramen inferior to the piriformis?

Answer 18

inferior gluteal A

Question 19

What supplies the uterus, vagina and anastomoses with the ovarian A?

Answer 19

uterine A

Question 20

Do venous plexuses in the pelvis have valves?

Answer 20

NO

Question 21

What do the venous plexuses in the pelvis communicate with?

Answer 21

each organ has own plexus that communicates with surrounding ones–>all connect with vertebral venous plexus (Batson’s veins)

Question 22

What do the pelvic veins correspond to (naming wise)?

Answer 22

branches of internal iliac As

Question 23

What supplies parasymp innervation to pelvic viscera, descending colon, sigmoid colon, rectum and proximal anal canal?

Answer 23

Pelvic Splanchnic N (S2-4)

Question 24

What plexus supplies the coccygeus muscle, part of levator ani M, and sacrococcygeal joint?

Answer 24

coccygeal plexus (S4-Co)

Question 25

Where do the anococcygeal N arise?

Answer 25

coccygeal plexus

Question 26

What N supplies the skin between the tip of the coccyx and anus?

Answer 26

anococcygeal N

Question 27

What are contained in the pelvic autonomic nerves?

Answer 27

inferior hypogastric plexus
pelvic splanchnic Ns
—>S2-4

Question 28

What plexus supplies sympathetic innervation to the pelvic viscera?

Answer 28

Inferior hypogastric plexus

Question 29

What are the branches of the inferior hypogastric plexus in the pelvic viscera themselves?

Answer 29

pelvic plexuses

—>sub-plexuses of inferior hypogastric

Question 30

What are sub-plexuses associated with in both males and females?

Answer 30

• lateral rectum

- inferolateral urinary bladder

Question 31

What are sub-plexuses associated with in males?

Answer 31

prostate gland

seminal vesicles

Question 32

What fibers in the prostatic plexus pierce the pelvic diaphragm to reach erectile tissues?

Answer 32

parasympathetic fibers

Question 33

What are sub-plexuses associated with in females?

Answer 33

cervix of uterus

lateral fornices of vagina

Question 34

What plexus is located on the posterolateral wall of the lesser pelvis?

Answer 34

sacral plexus

Question 35

List the branches of the sacral plexus (all) that exit through the greater sciatic foramen

Answer 35

• Sciatic N (L4-S3)
• Pudendal N (S2-4)
• Superior gluteal N (L4-S1)
• Inferior gluteal N (L4-S2)

Question 36

What N is inferior to piriformis and supplies posterior thigh, leg and foot?

Answer 36

Sciatic N

–>L4-S3

Question 37

What N passes b/t piriformis and coccygeus Ms along with the internal pudendal A?

Answer 37

pudendal N

–>S2-4

Question 38

What N supplies the perineum via lesser sciatic foramen?

Answer 38

pudendal N

–>S2-4

Question 39

What N passes superior to piriformis to supply gluteus medius and minimus?

Answer 39

Superior gluteal N

–>L4-S1

Question 40

What N passes superior to the piriformis to supply the gluteus maxius?

Answer 40

inferior gluteal N

–>L4-S2

Question 41

What receives lymph from posterioinferior pelvic viscera and drains to internal or common iliac nodes?

Answer 41

sacral LN

Question 42

What receives lymph from sacral, external and internal LNs–>lumbar LN?

Answer 42

common iliac LN

Question 43

What receives lymph from inferior pelvic vicera, deep perineum and gluteal region?

Answer 43

Internal iliac LN

–>drain into common iliac LN

Question 44

What receives lymph from inguinal nodes and superior parts of pelvic organs?

Answer 44

External iliac LN

–>drain into common iliac LNs