Lumbar Plexus

Question 0

What nerve contains fibers from T12 and L1

Answer 0

Iliohypogastric nerve

Question 1

What is the lumbar plexus formed by

Answer 1

anterior primary rami of L1-L3 and part of L4

the lumbar plexus will also receive contribution from T12 via the L1 nerve

Question 2

The iliohypogastric nerve gives off what branch after traveling anterior and inferiorly

Answer 2

lateral cutaneous branch

Question 3

After giving off the lateral cutaneous branch, the iliohypogastric nerve continues as what

Answer 3

anterior cutaneous branch

Question 4

The ilioinguinal nerve contains fibers from where

Answer 4

T12 and L1

Question 5

What does the ilioinguinal nerve enter and transmit through

Answer 5

inguinal canal

Question 6

How does the ilioinguinal nerve leave the inguinal canal

Answer 6

through the superficial inguinal ring

and travels with the spermatic cord

Question 7

If female, what does the ilioninguinal nerve travel with after it leaves teh inguinal canal

Answer 7

round ligament

Question 8

The ilioinguinal nerve supplies what type of innervation to the private parts of men and women

Answer 8

sensory

Question 9

The genitofemoral nerve contains fibers from where

Answer 9

L1 and L2

Question 10

The genitofemoral nerve passes anterior through what muscle before dividing into a genital branch and a femoral branch

Answer 10

psoas major muscle

Question 11

The genital branch of the genitofemoral nerve enters and travels through what

Answer 11

inguinal canal

Question 12

The genital branch supplies what innervation

Answer 12

sensory (to scrotum in males)

motor (to cremaster muscle)

Question 13

What reflex does the genital branch supply

Answer 13

cremasteric reflex

Question 14

The femoral branch passes into what, posterior to the inguinal ligament

Answer 14

into the thigh

Question 15

The lateral cutaneous nerve of the thigh contains fibers from where

Answer 15

L2 and L3

Question 16

The lateral cutaneous nerve is purely what type of innervation

Answer 16

sensory

Question 17

The lateral cutaneous nerve leaves what cavity by passing under the inguinal ligament

Answer 17

abdominal cavity

Question 18

The lateral cutaneous nerve travels anterior to the sartorius and through what before reaching the skin

Answer 18

fascia lata

Question 19

What is the largest branch of the lumbar plexus

Answer 19

femoral nerve

Question 20

Femoral nerve contains fibers from where

Answer 20

L2, L3, L4

Question 21

The femoral nerve passes posterior to the inguinal ligament and enters what, just lateral to the femoral artery

Answer 21

femoral triangle

Question 22

The femoral nerve gives off branches where

Answer 22

abdomen

femoral triangle

Question 23

Within the abdomen, the femoral nerve gives off muscular branches to what muscles

Answer 23

iliacus
pectineus
(also sends some fibers to the femoral artery)

Question 24

Once the femoral nerve is beyond the inguinal ligament, the nerve divides into what divisions

Answer 24

anterior and posterior division

Question 25

The anterior division of the femoral nerve gives rise to what 3 nerves

Answer 25

Intermediate cutaneous nerve of the thigh medial cutaneous nerve of the thigh nerve to the sartorius

Question 26

The lateral branch of the intermediate cutaneous nerve of the thigh will communicate with what

Answer 26

the femoral branch of the genitofemoral nerve

Question 27

Some branches of the medial cutaneous nerve of the thigh will supply the sin of the medial leg through communications with what nerve

Answer 27

saphenous nerve

Question 28

The posterior division continues into the leg as what

Answer 28

saphenous nerve

Question 29

The saphenous nerve is transmitted through what structure

Answer 29

adductor canal

Question 30

The saphenous nerve exits the adductor canal after doing what

Answer 30

crosses the femoral artery to the nerve, and lies medial to the artery

Question 31

In the leg the saphenous nerve travels with what

Answer 31

saphenous vein

Question 32

clinical considerations of the femoral nerve

Answer 32

patellar reflex | sensory deficits

Question 33

The obturator nerve contains fibers from what

Answer 33

L2, L3, L4

Question 34

Which nerve is the principle contributor to the obturator nerve

Answer 34

L3 nerve

Question 35

Which nerve is the minimal contributor to the obturator nerve

Answer 35

L2 nerve

Question 36

What does the obturator nerve travel on

Answer 36

obturator internus

Question 37

The obturator nerve leaves the pelvis through what

Answer 37

obturator foramen

Question 38

After leaving the obturator foramen, the obturator nerve divides into what

Answer 38

anterior and posterior branches

Question 39

The anterior and posterior branches of the obturator nerve are initially separated by what structure? Then by what

Answer 39

obturator externus then adductor brevis

Question 40

The anterior branch of the obturator nerve will send some branches to communicate with branches of the femoral nerve forming what

Answer 40

subsartorial plexus

Question 41

The termination of the anterior branch of the obturator nerve supplies what

Answer 41

femoral artery

Question 42

The anterior branch of the obturator nerve may send fibers to connect with what

Answer 42

accessory obturator nerve

Question 43

The anterior branch may send fibers to communicate with what

Answer 43

medial cutaneous nerve of the thigh | saphenous nerve

Question 44

The posterior branch of the obturator nerve sends what type of fibers to the knee joint

Answer 44

articular fibers

Question 45

Clinical considerations of the lumbar plexus

Answer 45

muscular weakness | sensory deficits