pelvic & perineal neurology

Question 1

what two nerves enter the spermatic cord

Answer 1

ilioinguinal n

genitofemoral n

Question 2

what spinal nerve is the ilioinguinal n

Answer 2

L1

Question 3

what nerve does the ilioinguinal nerve become in m/f

Answer 3

anterior scrotal n.

anterior labial n

Question 4

what are the spinal contributions of the obturator n

Answer 4

L2-L4

Question 5

what are the spinal contributions of the lumbosacral trunk

Answer 5

L4-L5

Question 6

why do we care about the lumbosacral trunk

Answer 6

because it feeds into the sacral plexus

***!!!!!!!

Question 7

what are the spinal contributions of the sacral plexus

Answer 7

L4-S4

Question 8

what does the coccygeal plexus do?

Answer 8

innervate levator ani & coccygeus

Question 9

what are the spinal contributions of the sciatic n

Answer 9

L4-S3

Question 10

what are the spinal contributions of the superior gluteal n

Answer 10

L4-S1

Question 11

what are the spinal contributions of the inferior gluteal n

Answer 11

L5-S2

Question 12

what are the spinal contributions of the nerve to obturator internus?

Answer 12

L5-S2

Question 13

what are the spinal contributions of the nerve to quadratus femoris?

Answer 13

L4-S1

Question 14

what are the spinal contributions of the nerve to piriformis?

Answer 14

S1-S2

Question 15

what are the spinal contributions of the pudendal n

Answer 15

S2-S4

Question 16

what are the spinal contributions of the posterior femoral cutaneous n

Answer 16

S1-S3

Question 17

what are the branches of the pudendal n

Answer 17

inferior rectal n.
dorsal n of the penis/clitoris
deep perineal nerve
superficial perineal n => posterior scrotal/labial n

Question 18

what is innervated by the perineal branch of the posterior femoral cutaneous n?

Answer 18

skin of the scrotum/labia majora

Question 19

how do you know if a branch of the pudendal nerve is a deep or superficial perineal n?

Answer 19

if it’s going to muscle, its a DEEP perineal nerve

if not, its a superficial perineal n

Question 20

where are cell bodies of the sympathetic nervous system kept?

Answer 20

in the thoracic and lumbar part of the spinal cord

Question 21

what two things contribute to the inferior mesenteric ganglion?

Answer 21

lumbar sympathetic trunk

lumbar splanchnic ns

Question 22

where do the presynaptic cell bodies of the pelvic splanchnic nerves live?

Answer 22

in the cona medullaris/cauda equina

Question 23

what two structures contribute to the superior hypogastric plexus?
is it sympathetic or parasympathetic?

Answer 23

lumbar splanchnic ns
inferior mesenteric plexus
ONLY SYMPATHETIC

Question 24

what two structures contribute to the inferior hypogastric plexus?
is it sympathetic or parasympathetic?

Answer 24

BOTH
PNS from pelvic splanchnic ns
SNS from hypogastric ns

Question 25

what structure contributes to the ovarian/testicular plexus? | is it sympathetic or parasympathetic?

Answer 25

intermesenteric plexus | BOTH SNS & PNS

Question 26

what structure contributes to the prostatic/uterovaginal plexus? is it sympathetic or parasympathetic?

Answer 26

inferior hypogastric plexus | BOTH

Question 27

what structure gives rise to the cavernous nerves? | is it sympathetic or parasympathetic?

Answer 27

ONLY PARASYMPATHETICS from the uterovaginal/prostatic plexus

Question 28

what structures are innervated by the cavernous nerves?

Answer 28

erectile tissue

Question 29

what do rami communicantes do?

Answer 29

carry sympathetic innervation from the sacral sympathetic trunk to the the somatic anterior rami of sacral spinal nerves

Question 30

where do pelvic splanchnic nerves exit the spinal cord

Answer 30

they exit with the anterior rami of sacral spinal nerves