ABD/Pelvis Mm - Lumbosacral Plexus

Question 1

What makes up the L1 nerve root?

Answer 1

iliohypogastric n
ilioinguinal n

Question 2

What does the ilioinguinal n run in?

Answer 2

inguinal canal

Question 3

What does the genitofemoral n run in?

Answer 3

the spermatic cord in males

Question 4

Nerve roots of the genitofemoral n?

Answer 4

L1, L2
(L1 joins with ant b of L2 to form genitofemoral n)

Question 5

The iliohypogastric, ilioinguinal and genitofemoral nn all supply cutaneous inn to…

Answer 5

lower abdominal, hip and genital areas

Question 6

What mm does the iliohypogastric n inn? (3)

Answer 6

external oblique
internal oblique
transversus abdominis

Question 7

Cutaneous inn of iliohypogastric n? (2)

Answer 7

lower abdomen and buttock

Question 8

Clinical implication of iliohypogastric n?

Answer 8

hip pointer

Question 9

What mm does the ilioinguinal nerve inn? (2)

Answer 9

internal oblique
transversus abdominis

Question 10

Cutaneous inn of ilioinguinal n?

Answer 10

males – root of penis
females – labia majora, mons pubis

Question 11

In males, what 2 nerves travel with the spermatic cord?

Answer 11

ilioinguinal n, genitofemoral n

Question 12

What m does the genitofemoral n inn? (1)

Answer 12

cremaster m

Question 13

Cutaneous inn of genitofemoral n?

Answer 13

both – middle/ant surface of thigh
male – scrotum
female – labia majora

Question 14

Nerve roots of LFC n?

Answer 14

L2-L3 (post div, lumbar plexus)

Question 15

Nerve roots of obturator n?

Answer 15

L2-L4 (ant div, lumbar plexus)

Question 16

Nerve roots of femoral n?

Answer 16

L2-L4 (post div, lumbar plexus)

Question 17

Nerve roots of pudendal n?

Answer 17

S2-S4 (sacral plexus)

Question 18

What mm does the pudendal n inn?

Answer 18

mm of perineum

Question 19

Cutaneous inn of pudendal n?

Answer 19

males – skin of penis and scrotum
females – clitoris, labia majora, labia minora, lower vagina

Question 20

lumbosacral trunk contribution to the sacral plexus

Answer 20

L4-5

Question 21

• arises from lumbar plexus (L2-4)
• exits pelvis via obturator foramen with artery
• innervates medial compartment of thigh

Answer 21

obturator n.