Pelvis nerves

Question 1

Pudendal nerve spinal cord levels

Answer 1

S2-S4

Question 2

Pudendal nerve source

Answer 2

Sacral plexus (S2-S4)

Note: Loops between sacrotuberous and sacropinous ligaments alongside pudendal vessels. Mnemonic: S2, 3, 4 keeps the feces off the floor

Question 3

Pudendal nerve destination

Answer 3

Nerves of anus; perineum; dorsal nerve of penis/clitoris, pelvic floor

Question 4

Pudendal nerve innervates

Answer 4

Skin of perineum and external anus; clitoris/penis; muscles of pelvic floor, perineum, external anal sphincter

Question 5

Dorsal nerve of clitoris/penis spinal cord levels

Answer 5

S2-S4

Question 6

Dorsal nerve of clitoris/penis source

Answer 6

Pudendal nerve

Question 7

Dorsal nerve of clitoris/penis destination

Answer 7

clitoris/penis

Question 8

Dorsal nerve of clitoris/penis innervates

Answer 8

Skin and deep tissue of clitoris/penis

Question 9

Pelvic Sympathetic chain spinal cord levels

Answer 9

L1-L2

Note: Travels inferiorly into pelvic cavity to provide sympathetic innervation

Question 10

Pelvic Sympathetic chain source

Answer 10

Abdominal sympathetic chain, ventral rami of spinal nerves L1-L2

Question 11

Pelvic Sympathetic chain destination

Answer 11

Viscera of pelvis, skin/glands of periphery in pelvis and lower limb

Question 12

Pelvic Sympathetic chain innervates

Answer 12

Pelvic viscera, reproductive organs, glands of pelvis and lower limb

Question 13

Obturator Nerve spinal cord levels

Answer 13

L2-L4

Note: Found medial to psoas major, runs inferiorly to go through obturator canal

Question 14

Obturator nerve source

Answer 14

Ventral rami of spinal nerves L2-L4

Question 15

Obturator nerve destination

Answer 15

Medial Thigh

Question 16

Obturator nerve innervates

Answer 16

Muscles and skin of medial compartment of thigh

Question 17

Lumbosacral trunk spinal cord levels

Answer 17

L4-L5

Note: Lumbar contribution to sacral peripheral nerves like the gluteal nerves and sciatic nerves, found medial to psoas major and deep to obturator nerve

Question 18

Lumbosacral trunk source

Answer 18

Ventral rami of spinal nerves L4-L5

Question 19

Lumbosacral trunk destination

Answer 19

Sacral Plexus

Question 20

Lumbosacral trunk innervates

Answer 20

Contributes to sacral plexus nerves like gluteal nerves, sciatic nerve

Question 21

Sacral Ventral Rami spinal cord levels

Answer 21

S1-S3

Note: Joins lumbosacral trunk to form sacral plexus in particular sacral component of major lower limb and pelvic nerves; sympathetic chain also contributes. S4+S5 are also part of the plexus but likely hard to see, so they are not included.

Question 22

Sacral Ventral rami source

Answer 22

Spinal nerves S1-S3

Question 23

Sacral Ventral rami destination

Answer 23

Sacral plexus

Question 24

Sacral Ventral rami innervates

Answer 24

Contributes to sacral plexus nerves like the gluteal nerves, sciatic nerve, pudendal nerve