Nerves of the Lower Limb

Question 1

what rami make up the lumbosacral plexus?

Answer 1

ventral rami of L1-S4

Question 2

What are the nerve roots of the femoral nerve?

Answer 2

L2-L4

Question 3

what are the nerve roots of the sciatic nerve?

Answer 3

L4-S3

Question 4

what branches does the femoral nerve give off?

Answer 4

muscular, anterior cutaneous femoral and saphenous branches

Question 5

what is the sensory innervation of the femoral nerve?

Answer 5

hip + knee joints

skin on the anterior surface of the thigh through the anterior cutaneous femoral branch

skin on the medial leg and foot through the saphenous nerve

Question 6

what is the motor innervation of the femoral nerve?

Answer 6

Iliacus

muscles in the anterior compartment of the thigh (Quadriceps Femoris, Sartorius, Pectineus)

Question 7

what are the nerve roots of the saphenous nerve?

Answer 7

L3-L4

Question 8

What is the sensory supply of the saphenous nerve?

Answer 8

skin on the medial surface of the knee

anteromedial surface of the leg

medial malleolus

Question 9

What are the nerve roots of the obturator nerve?

Answer 9

L2-L4

Question 10

What is the sensory innervation of the obturator nerve?

Answer 10

hip joint
upper half of the medial thigh
knee joint

Question 11

What is the motor innervation of the obturator nerve?

Answer 11

obturator externus

Medial Thigh Compartment: Adductor magnus, Adductor Longus, Adductor Brevis, Gracilis

Question 12

What are the nerve roots of the sacral plexus?

Answer 12

L4-S4

Question 13

What are the nerve roots of the superior gluteal nerve?

Answer 13

L4-S1

Question 14

What are the nerve roots of the inferior gluteal nerve?

Answer 14

L5-S2

Question 15

What structures are supplied by the superior gluteal nerve?

Answer 15

gluteus medius, gluteus minimus, tensor fasciae latae

Question 16

What structures are innervated by the inferior gluteal nerve?

Answer 16

gluteus maximus

Question 17

How does the sciatic nerve enter the gluteal region?

Answer 17

infrapiriform space

Question 18

how does the superior gluteal nerve exit the pelvis?

Answer 18

through the suprapiriform space

Question 19

how does the inferior gluteal nerve exit the pelvis?

Answer 19

through the infrapiriform space

Question 20

what is the sensory innervation of the sciatic nerve?

Answer 20

hip joint

Question 21

what is the motor innervation of the hip joint?

Answer 21

posterior compartment of the thigh (hamstrings)

adductor magnus

Question 22

what are the root values of the tibial nerve?

Answer 22

L4-S3

Question 23

what is the sensory innervation of the tibial nerve?

Answer 23

ankle joint

skin of heel

Question 24

What is the motor innervation of the tibial nerve?

Answer 24

Hamstring muscles (EXCEPT short head of biceps femoris)

Plantaris, Soleus

Superficial & Deep posterior compartments of the leg

Question 25

What is the motor supply of the medial plantar nerve?

Answer 25

abductor hallucis, flexor hallucis brevis, flexor digitorum brevis, lumbrical 1

Question 26

what is the sensory supply of the medial plantar nerve?

Answer 26

The anterior two-thirds of the sole and adjacent surfaces of the medial 1.5 toes

Question 27

What is the sensory innervation of the lateral plantar nerve?

Answer 27

the skin on the lateral side of the anterior two-thirds of the sole and the adjacent plantar surfaces of the lateral 1.5 digits

Question 28

what are the root values of the common peroneal nerve?

Answer 28

L4-S2

Question 29

what does the peroneal nerve supply?

Answer 29

short head biceps femoris

Question 30

what is the sensory innervation of the sural nerve?

Answer 30

skin on lower posterolateral surface of the leg and the lateral side of the foot

Question 31

what are the root values of the deep fibular nerve?

Answer 31

L4-L5

Question 32

what is the sensory innervation of the deep fibular nerve?

Answer 32

ankle joint | between 1st and 2nd toes

Question 33

what is the motor innervation of the deep fibular nerve?

Answer 33

muscles in the anterior compartment of the leg ``` extensor hallucis longus extensor digitorum longus fibularis tertius EDB EHB ```

Question 34

what are the root values of the superficial fibular nerve?

Answer 34

L5-S2

Question 35

what is the sensory innervation of the superficial fibular nerve?

Answer 35

ankle joint, skin on anterior distal leg, skin on dorsum of foot

Question 36

what is the motor innervation of the superficial fibular nerve?

Answer 36

muscles in the lateral compartment of the leg fibularis longus fibularis brevis

Question 37

What nerve supplies the dorsal group muscles of the foot? What are its nerve roots?

Answer 37

Deep fibular nerve S1-S2

Question 38

What nerve supplies the abductor hallucis? What are its nerve roots?

Answer 38

Medial plantar nerve S1-3

Question 39

What nerve supplies the flexor digitorum brevis? What are its roots?

Answer 39

Medial plantar nerve S1-3

Question 40

What nerve supplies the abductor digiti minimi? What are its nerve roots?

Answer 40

Lateral plantar nerve S1-3

Question 41

What nerve supplies the quadratus plantae?

Answer 41

Lateral plantar nerve S1-3

Question 42

What is the innervation of the lumbrical muscles?

Answer 42

1st Lumbrical: Medial plantar nerve All others: Lateral Plantar Nerve

Question 43

What is the innervation of the flexor hallucis brevis?

Answer 43

medial plantar nerve

Question 44

What is the innervation of the adductor hallucis and flexor digiti minimi brevis?

Answer 44

Lateral Plantar nerve

Question 45

What is the innervation of the dorsal interossei of the foot?

Answer 45

Lateral plantar nerve S2-3 1-2 innervated by the deep fibular nerve S2-3