Neurology

Question 1

What does the ilioinguinal N of the lumbar plexus innervate?

Answer 1

Branches into anterior scrotal N that innervates anterior scrotum and anterior labial N that innervates anterior labia majora

Question 2

What does the genital branch of the genitofemoral N from the lumbar plexus supply?

Answer 2

Scrotum in males and labia majora in females

Question 3

What does the obturator N from the lumbar plexus innervate?

Answer 3

Innervates medial thigh musculature

Question 4

What does the lumbosacral trunk supply?

Answer 4

Feeds into sacral plexus

Question 5

Which nerves are in the sacral plexus?

Answer 5

Superior gluteal, inferior gluteal, muscular branches, posterior femoral cutaneous, perforating cutaneous branches, pudendal, sciatic and pelvic splanchnic nerves

Question 6

What does the superior gluteal N innervate?

Answer 6

Innervates gluteus medius and gluteus minimus

Question 7

Which nerves carry L4-S1 spinal branches?

Answer 7

Superior gluteal N and nerve to quadratus femoris

Question 8

What does the inferior gluteal N innervate?

Answer 8

Gluteus maximus

Question 9

Which nerves carry L5-S2 spinal levels?

Answer 9

Inferior gluteal N and N to obturator internus

Question 10

What are the muscular branches of the sacral plexus?

Answer 10

N to quadratus femoris, nerve to obturator internus and nerve to piriformis (S1-2)

Question 11

Describe the posterior femoral cutaneous N

Answer 11

S1-3

To the buttock and upper most region of posterior thigh

Question 12

What do the perforating cutaneous branches innervate?

Answer 12

S2-3

To the medial buttock

Question 13

Describe the pudendal N

Answer 13

S2-4
To structures of perineum
Produces the perineal N, inferior rectal N, and the dorsal N of the penis in males (and clitoris in females)

Question 14

What does the inferior rectal N innervate?

Answer 14

Innervates anal canal inferior to the pectinate line and external anal sphincter

Question 15

What does the dorsal N of the penis innervate?

Answer 15

Travels along the dorsum of the penis

Question 16

The dorsal N of the clitoris travels along what?

Answer 16

The dorsum of the clitoris

Question 17

What does the deep perineal N innervate?

Answer 17

Superficial and deep transverse perineal Ms, ischiocavernosus, bulbospongiosus M, vaginal vestibule, and inferior most part of the vagina

Question 18

Describe the superficial perineal N

Answer 18

Produces posterior scrotal N in the male and posterior labial N in the female
Both terminal branches of perineal N and supply named structure

Question 19

Describe the sciatic nerve

Answer 19

L4-S3

Branches into tibial L4-S3 supplying LE and common fibular L4-S2 supplying LE

Question 20

What are the spinal levels for the pelvic splanchnic N?

Answer 20

S2-4

Question 21

Describe the coccygeal plexus

Answer 21

Anococcygeal N innervating small area of skin in coccygeal region
Muscular branches including nerve to levator ani (S4) and nerve to coccygeus (S4-5)

Question 22

Visceral sensory fibers accompany the parasympathetic fibers of the what?

Answer 22

Pelvic splanchnic Ns conveying retrograde pain impulses through pelvic splanchnic Ns into ventral rami of sacral spinal Ns then onto the dorsal root and dorsal root ganglion where the cell bodies exist finally synapsing in the dorsal horn of the SC

Question 23

Visceral sensory fibers from the fundus and body of the uterus accompany the sympathetic fibers of what?

Answer 23

The uterovaginal plexus through the autonomic plexuses and rami communicantes of the SC

Question 24

Visceral sensory fibers from the cervix of the uterus and upper majority of the vagina accompany parasympathetic fibers of the what?

Answer 24

Uterovaginal plexus through the pelvic splanchnic Ns into the sacral part of the SC

Question 25

Review autonomics

Answer 25

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