High Yield Nerves and vasculature of thigh

Question 1

L1,L2

Answer 1

Genitofemoral nerve

Skin on proximal anterior surface of thigh

Question 2

L2,L3

Answer 2

Lateral femoral cutaneous nerve

Question 3

Anterior branch of the lateral femoral cutaneous nerve

Answer 3

skin over lateral and anterior thigh

Question 4

Posterior branch of lateral femoral cutaneous

Answer 4

skin of lateral thigh from greater trochanter distally to mid thigh.

Question 5

L2,3,4 Obturator nerve

Answer 5

Obturator nerve

Note femoral nerve is also L2,3,4.

Question 6

L3,4

Answer 6

Accessory obturator nerve only present in `10% of cases deep to pectineus and to hip joint.

Question 7

Longest branch of the femoral nerve

Answer 7

saphenous nerve.

Question 8

Which two muscles does the saphenous nerve exit through?

Answer 8

Does not exit through the adductor hiatus instead exits between sartorius and gracillis to follow the great saphenous vein.

Question 9

Infrapatellar branch

Answer 9

Cutaneous innervation to skin over patella.

Question 10

Subsartorial plexus

Answer 10

Anterior branch of obturator nerve
Saphenous nerve
Medial femoral cutaneous nerve.

Gives to posteromedial aspect of distal third of thigh.

Question 11

In the event that the peroneal and tibial portions begin as separate entities, where do they leave the pevlis?

Answer 11

Tibial leaves inferior to piriformis

Peroneal peirces the piriformis.

Question 12

The perforating cutaneous nerve is missing in ….

Answer 12

1/3 - 1/2 of bodies arising in common with the pudendal nerve.

Question 13

Smallest branch of the femoral artery

Answer 13

superficial circumflex iliac artery.

Question 14

Superficial circumflex iliac artery anastamoses

Answer 14

Anatamoses with:
Deep circumflex iliac
Superior gluteal
Lateral femoral circumflex.

Question 15

Which muscular branches come directly from the femoral artery?

Answer 15

Vastus medialis
Sartorius
Adductor muscles

Question 16

Quadratus profundus lies behind which muscle

Answer 16

adductor magnus.

Question 17

…% of the time the lateral femoral circumflex arises from the femoral nerve instead of the profunda femorus.

Answer 17

20% of the time.

Question 18

lateral femoral circumflex runs under which two muscles?

Answer 18

Runs under the sartorius and the rectus femorus.

Question 19

Ascending branch of the lateral femoral circumflex artery anastamoses with

Answer 19

inferior gluteal

Deep circumflex iliac arteries

Question 20

transverse branch of the lateral femoral circumflex artery anastamoses with

Answer 20

Forms Cruciate Anastamoses:
medial femoral circumflex
Inferior gluteal artery
First perforating artery

Question 21

In… % of individuals the medial femoral circumflex originates directly from the femoral artery.

Answer 21

25% of individuals.

Question 22

Medial femoral circumflex supplies these muscles

Answer 22

Adductor muscles
gracilis
obturator externus***

Question 23

The descending branch of the lateral femoral circumflex artery anastamoses with…

Answer 23

Anastamoses with the superior lateral geniculate branch of the popliteal artery.

Question 24

What unique structure does the medial femoral circumflex artery supply?

Answer 24

The acetabular branch that supplies the fat in the acetabular fossa and head of femur.

Question 25

Which muscle serves to separate the different perforating arteries.

Answer 25

The adductor brevis.
1st is superior to it
2nd is anterior to it
3rd is distal to the muscle.

Question 26

Which perforating artery of the profundus femorus supplies the nutrient artery to the femur?

Answer 26

The second perforating artery.

Question 27

Terminal branches of descending genicular artery

Answer 27

saphenous branch and articular branch

Question 28

In the popliteal fossa the popliteal artery lies …. to the vein.

Answer 28

Lies deep to the vein.

Even lies deep to the semimembranosus muscle and gastrocnemius.

Question 29

What are the branches of the popliteal artery?

Answer 29

Superior medial and lateral genicular arteries
Sural
Muscular

Question 30

Muscles supplied by the sural arteries

Answer 30

gastrocnemus
soleus
plantaris
*note no popliteus.

Question 31

Which two arteries exit the saphenous hiatus?

Answer 31

The superficial external pudendal and superficial epigastrics.

Question 32

Which two vessels dump into the femoral vein?

Answer 32

Inferior gluteal vein.

Forms an anastamotic channel between femoral and internal iliac veins.

Question 33

What are the locations of the 5 lymph nodes in the knee.

Answer 33

One anterior/deep to popliteal artery receiving vessels from within the knee joint.

One posterior/superficial to the popliteal vein/small saphenous vein.

Remaining 4-5 lie within the fat medially and laterally to vessel.