Nerves and Vessels of the thigh UGH

Question 1

What forms the lumbar plexus?

Answer 1

Ventral rami of L1-4

Question 2

What forms the sacral plexus?

Answer 2

Lumbosacral trunk (ventral rami L4-5)
Ventral rami of S1-4

Question 3

Which compartments do the ventral rami of L1-4 supply?

Answer 3

Glutes

Anterior and adductor compartment

Question 4

Which key nerve does the posterior division of the lumbar plexus give rise to, and what are the divisions?

Answer 4

L2-4; femoral nerve

remember the lower limbs twist during development, so the posterior divisions give rise to anterior nerves

Question 5

Which key nerve does the anterior division of the lumbar plexus give rise to, and what are the divisions?

Answer 5

L2-4; obturator nerve = anterior divisions of lumbar plexu s

Question 6

What is the cutaneous nerve of the lower limb and which roots give rise to this?

Answer 6

Lateral femoral cutaneous nerve (L2-3)

Question 7

The sciatic nerve is formed by which roots/

Answer 7

L4-S3

Question 8

Which nerves combine to form the sciatic nerve?

Answer 8

Tibial nerve

Peroneal nerve

Question 9

The superior gluteal nerve is formed by which roots?

Answer 9

L4-S1

Question 10

The inferior gluteal nerve is formed by which roots?

Answer 10

L5-S2

Question 11

Which muscles are innervated by the femoral nerve?

Answer 11

Quads
Sartorius
Pectineus
(Iliacus)

Question 12

L1 gives rise to which two nerves?

Answer 12

Iliohypogastric
Ilioinguinal

(sensory)

Question 13

L1/2 gives rise to which nerve?

Answer 13

Genitofemoral nerve

sensory

Question 14

L2/3 gives rise to which nerve?

Answer 14

Lateral cutaneous femoral nerve of thigh

Question 15

Which two sensory branches arise from L2-4?

Answer 15

Sensory branches of the femoral nerve

Sensory branches of the obturator nerve

Question 16

S2/3 gives rise to which nerve?

Answer 16

Posterior cutaneous nerve of thigh

Question 17

Name a sensory branch of the femoral nerve

Answer 17

Saphenous nerve (L2-4)

Question 18

What does the saphenous nerve supply?

Answer 18

Anteromedial knee
Medial leg
Foot

(sensory)

Question 19

The obturator nerve supplies all the muscles of the adductor compartment except?

Answer 19

The hamstring half of the adductor magnus

Pectineus

Question 20

What cutaneous branch does the obturator nerve give rise to?

Answer 20

Cutaneous branch to medial thigh

Question 21

Which muscles are supplied by the tibial section of the sciatic nerve?

Answer 21

Semitendinosus
Semimembranosus
Long head of biceps femoris
Hamstring component of adductor magnus

Question 22

Which muscles are supplied by the peroneal section of the sciatic nerve?

Answer 22

Short head of biceps femoris

Question 23

What is the nerve supply to the biceps femoris?

Answer 23

Short head - peroneal

Long head - tibial

Question 24

Name 3 muscles supplied by the superior gluteal nerve and what are the nerve roots?

Answer 24

Glut medius
Glu minimus
Tensor fascia lata

L5-S1

Question 25

What does the inferior gluteal nerve supply and what are the nerve roots?

Answer 25

L5-S2

Question 26

What are the nerve roots of the nerve to the piriformis?

Answer 26

S1-2

Question 27

Which other muscle is supplied by the 'nerve to obturator internus'?

Answer 27

Gemellus superior L5-S2

Question 28

Which other muscle is supplied by the 'nerve to quadratus femoris'?

Answer 28

Gamellus inferior L4-S1

Question 29

What are the borders of the femoral triangle?

Answer 29

Inguinal ligament Adductor longus Sartorius

Question 30

What is the inferior end of the femoral triangle continuous with?

Answer 30

Adductor canal

Question 31

What are the borders of the adductor canal?

Answer 31

``` Sartorius (anterior) Adductor longus and magnus (posterior) Vastus medialis (lateral) ```

Question 32

What does the adductor canal contain?

Answer 32

Superficial femoral artery Femoral vein Saphenous nerve

Question 33

Where does the adductor canal end?

Answer 33

At the adductor hiatus

Question 34

What now passes through the adductor hiatus?

Answer 34

Popliteal artery Popliteal vein (the femoral artery and vein become these)

Question 35

What gives rise to the femoral artery?

Answer 35

External iliac (bifurcation of the common iliacs, which bifurcate from the aorta

Question 36

What is the main branch of the femoral artery?

Answer 36

Profunda femoris

Question 37

Where can the femoral artery be palpated and what can it be palpated against?

Answer 37

Halfway between ASIS and pubic symphysis, against the psoas tendon

Question 38

Besides the medial and lateral circumflex arteries, what else does the profunda femoris give rise to?

Answer 38

Perforating arteries

Question 39

Which vein does the femoral vein become and what is the junction called?

Answer 39

Long saphenous vein Saphenofemoral junction in the femoral triangle

Question 40

What are the deep veins of the thigh?

Answer 40

External iliac vein Femoral vein Popliteal vein

Question 41

What is special about the femoral vein?

Answer 41

The vanae comitantes of the profunda femoris ARTERY drains into the femoral vein

Question 42

Describe the flow of lymph via the inguinal nodes

Answer 42

Superficial to deep inguinal nodes | Deep inguinal to external iliac nodes