Lumbar Plexus - Part 2

Question 1

Which is the largest branch of the lumbar plexus?

Answer 1

The femoral nerve

Question 2

The femoral nerve contains fibers from what?

Answer 2

L2, L3, and L4

Question 3

The femoral nerve forms where?

Answer 3

Posterior to the psoas major

Question 4

The femoral nerve emerges where?

Answer 4

Lateral to psoas and anterior to the iliacus

Question 5

The femoral nerve pass posterior to what?

Answer 5

The inguinal ligament

Question 6

Once the femoral nerve passes the inguinal ligament it enters what area?

Answer 6

The femoral triangle

Question 7

Once the femoral nerve enters the femoral triangle it is just lateral to what?

Answer 7

The femoral artery

Question 8

From the femoral triangle, the femoral nerve runs inferior and _______ through what?

Answer 8

Medically,

Adductor canal

Question 9

The femoral nerve enters the leg on which side of the knee?

Answer 9

medial

Question 10

The femoral nerve only gives off branches in which two areas?

Answer 10

In abdomen and femoral triangle

Question 11

In which area does the femoral nerve give of muscular branches?

Answer 11

abdomen

Question 12

The muscular branches given off by the femoral nerve in the abdomen supply what?

Answer 12

Iliacus

pectineus

Question 13

The muscular branches given off by the femoral nerve in the abdomen supply the iliacus and pectineus and also sends fibers to what other structure?

Answer 13

The femoral artery

Question 14

One the femoral nerve passes the inguinal ligament it divides into what?

Answer 14

Anterior and posterior division

Question 15

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

Answer 15

Intermediate cutaneous nerve of the thigh
Medial cutaneous nerve of the thigh
Nerve to the sartorius

Question 16

The intermediate cutaneous nerve of the thigh and supplies what?

Answer 16

Skin on the anterior thigh down to the knee

Question 17

The lateral branch of the intermediate cutaneous nerve of the thigh communicates with what branch of what nerve?

Answer 17

The femoral branch of the genitofemoral nerve

Question 18

The medial cutaneous nerve of the thigh crosses anterior to what?

Answer 18

The femoral artery

Question 19

The medial cutaneous nerve of the thigh sends branches to supplies what?

Answer 19

Skin of medial thigh,
Medial knee,
Knee across to the lateral side of the patella

Question 20

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

Answer 20

saphenous nerve

Question 21

The nerve to the sartorius supplies what?

Answer 21

Sartorius muscle

Question 22

The posterior division of the femoral nerve gives rise to what types of branches?

Answer 22

Muscular branches
Vascular branches
Articular branches

Question 23

After the posterior division of the femoral artery gives rise to its branches, it becomes what nerve?

Answer 23

Saphenous nerve

Question 24

The muscular branches of the posterior division of the femoral nerve supply what muscle?

Answer 24

Quadriceps muscles

Question 25

The vascular branches of posterior division of the femoral nerve supply what?

Answer 25

The femoral artery and its branches

Question 26

The articular branches of the posterior division of the femoral nerve supply what?

Answer 26

The knee joint

Question 27

What muscles (specifically) are supplied by the muscular branches of the posterior division of the femoral nerve?

Answer 27

``` Sartorius Rectum femoris vastus lateralis vastus medialis vastus intermediate ```

Question 28

Where are the muscular branches of the femoral nerve given off?

Answer 28

In the femoral triangle

Question 29

**The saphenous nerve is transmitted through what?**

Answer 29

The adductor canal

Question 30

The saphenous nerve cross what in the canal and emerges ______ to this structure when exiting the abductor canal?

Answer 30

Femoral artery | medial

Question 31

The saphenous nerve supplies what?

Answer 31

Skin medial and anterior to the patella

Question 32

In the leg the saphenous nerve travels with what?

Answer 32

The great saphenous vein

Question 33

What nerve is the only cutaneous supply for the posterior division of the femoral nerve?

Answer 33

The saphenous nerve

Question 34

The saphenous nerve supplies what in the leg?

Answer 34

Skin of the medial leg and foot

Question 35

What are some clinical considerations with the femoral nerve?

Answer 35

Patellar reflex and | Sensory deficits

Question 36

If there is any discrepancy in the quads (patellar reflex) what nerve should you be thinking?

Answer 36

Femoral nerve

Question 37

What sensory deficits could show up with the femoral nerve??

Answer 37

Paresthesia (tingling numbness), 2 pt touch discrimination, pain, temp, unilateral issues

Question 38

The obturator nerve contains fibers from what?

Answer 38

L2, L3, and L4

Question 39

What nerve is the principal contributor to the obturator nerve?

Answer 39

L3

Question 40

What nerve is the minimal contributor the obturator nerve?

Answer 40

L2

Question 41

The obturator nerve travels medial to what?

Answer 41

Psoas major

Question 42

The obturator nerve travels posterior to what?

Answer 42

Common iliac vessels

Question 43

The obturator nerve descends into the pelvis, traveling on what?

Answer 43

Obturator internus

Question 44

The obturator nerve leaves the pelvis through what?

Answer 44

The obturator foramen

Question 45

After leaving the obturator foremen, the obturator nerve divides into a _____ and ___ .

Answer 45

Posterior and anterior branch

Question 46

The anterior and posterior branch of the obturator nerve are separated initially by what muscle? And then by what muscle?

Answer 46

Obturator externus | Adductor brevis

Question 47

The anterior branch of the obturator nerve travels anterior to what?

Answer 47

Obturator externus | Adductor brevis

Question 48

The anterior branch of the obturator nerve travels posterior to what muscles?

Answer 48

Pectineus | Adductor longus

Question 49

The anterior branch of the obturator nerve will communicate with branches of what nerve?

Answer 49

Femoral nerve

Question 50

When the anterior branch sends branches to communicate with the branches of the femoral nerve, what does this form?

Answer 50

subsartorial plexus

Question 51

The subsartorial plexus contributes to the supply of what?

Answer 51

Skin on the medial thigh

Question 52

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

Answer 52

Femoral artery

Question 53

The anterior branch of the obturator nerve sends articular branches to what?

Answer 53

The hip joint

Question 54

The anterior branch sends muscular branches to what main 2 muscles?

Answer 54

Abductor longus | gracilis

Question 55

The muscular branches of the obturator nerve can also supply what other two muscles?

Answer 55

Pectineus | Abductor brevis

Question 56

What muscle does the muscular branches of the obturator nerve (anterior branch) share with another nerve? What other nerve supplies this muscle?

Answer 56

Pectineus | Femoral nerve

Question 57

The anterior branch of the obturator nerve may send fibers to connect with what nerve, if present?

Answer 57

Accessory obturator nerve

Question 58

The anterior branch of the obturator nerve may send fibers to communicate with what other two nerves off of the femoral nerve?

Answer 58

Medial cutaneous nerve | Saphenous nerve

Question 59

If the anterior branch of the obturator nerve sends fibers to communicate with the medial cutaneous nerve and the saphenous nerve, what will it contribute supply to?

Answer 59

Skin on upper medial side of the leg

Question 60

The posterior branch of the obturator nerve travels through what?

Answer 60

Obturator externus

Question 61

The posterior branch of the obturator nerve travels through the obturator externus posterior to ___ and anterior to ____?

Answer 61

Adductor brevis | Adductor magnus

Question 62

The posterior branch of the obturator nerve will send muscular branches to supply what two muscles?

Answer 62

Obturator externus | Adductor magnus

Question 63

If the anterior branch does not supply this muscle the posterior branch of the obturator nerve will. What muscle is this?

Answer 63

Adductor brevis

Question 64

The posterior division of the obturator nerve supplies articular branches to what?

Answer 64

The knee joint

Question 65

All muscles supplied by the obturator nerve have what action?

Answer 65

Adduction of hip

Question 66

Problems with the obturator nerve resulting in muscular weakness will show what?

Answer 66

Hip adduction weakened

Question 67

What sensory deficits can be seen with a compromised obturator nerve?

Answer 67

Medial aspect of thigh (overlap with branches of femoral)