Lower Extremity Innervation

Question 1

Answer 1

Question 2

the __ plexus innervates the lower extremities

Answer 2

lumbosacral plexus

Question 3

4 motor nerves that innervate the lower extremities

Answer 3

1. obturature
2. femoral (thihg and hip)
3. fibular/peroneal (leg)
4. tibial

Question 4

the peroneal and tibial nerves run together to form the ___ nerve befoe branching out

Answer 4

sciatic nerve

Question 5

Answer 5

Question 6

which nervous plexuses exist at these vertebral levels?

Answer 6

Question 7

Fill out this innervation

Question 8

the femoral nerve serves the ___ compartment of the thigh

Answer 8

the anterior compartment of the thigh and hip– ie, the sartorius, rector femoris, vastus intermedius, medialis, lateralis, iliopsoas.

Question 9

the obturator nerve is part of the ___ plexus and supplies the ___ compartment of the hip and thigh

Answer 9

part of the lumbosacral plexus and innercates the MEDIAL compartment; ie the adductor longus, magnus, brevis, gracilis,

Question 10

the supeiror gluteal nerve is part of the ___ plexus and supplies the;

Answer 10

part of the sacral plexus and supplies the posterior hip EXCEPT the gluteus maximus

Question 11

what nerve supplies the gluteus maximus?

Answer 11

inferior gluteal nerve of the sacral plexus

Question 12

the ____ nerve serves the anterior compartments of the leg/tibia

the ____ nerve serves the lateral compartment

• the ___- enrve serves the posterior nerve

the tibular nerve and common fibular nerve diverage at the ___ fossa.

Answer 12

the deep fibular/peroneal nerve serves the anterior compartments of the leg/tibia

the superficial fibular nerve serves the lateral compartment

• the tibial nerve serves the posterior nerve

the tibular nerve and common fibular/peroneal nerve diverage at the POPLITEAL fossa.

Question 13

Answer 13

Question 14

Answer 14

Question 15

note:

Answer 15

Question 16

what nerve innervates the posterior thigh

Answer 16

the sciatic nerve.

Question 17

above the popliteal fossa, the __ ___ diverges from the common fibular nerve, the CF passes arounf the head of the fibula and splits into the __ fibular, serving anterior compartment, and __ fibular, serving the lateral compartment.

a common fibular nerve is vulnerable nerv eis vulnerable to pressuere applied over the head of the fibula.

the tibial nerve continues through the __ __ to innervate the __ compartments of the leg.

Answer 17

above the popliteal fossa, the tibial nerve diverges from the common fibular nerve, the CF passes arounf the head of the fibula and splits into the deep fibular, serving anterior compartment, and superficial fibular, serving the lateral compartment.

a common fibular nerve is vulnerable nerv eis vulnerable to pressuere applied over the head of the fibula.

the tibial nerve continues through the popliteal fossa to innervate the posterior compartments of the leg.

Question 18

An elderly man walks into a clinic complaining of pain in his lower back that radiates down the posterior thigh. He does not show any signs of traumatic injury.

Which nerve supplies the posterior compartment of the thigh?

1. Tibial division of the sciatic n.

2 Deep fibular n.

3 Femoral n. (L2-4)

4 Obturator n. (L2-4)

Answer 18

1- the sciatic nerve serves the posterior thigh, and then branches into the tibial division and fibular division

Question 19

Which nerve supplies the anterior compartment of the thigh?

Superficial fibula n.

Obturator n. (L2-4)

Femoral n. (L2-4)

Sciatic n. (L4-S3)

Answer 19

Femoral n. (L2-4)

Question 20

Which nerve supplies the medial compartment of the thigh?

Obturator n. (L2-4)

Femoral n. (L2-4)

Sciatic n. (L4-S3)

Tibial n.

Answer 20

Obturator n. (L2-4)

Question 21

When the femoral a. traverses through the adductor hiatus in the adductor magnus m., it’s name changes to the ___ a___.

Answer 21

When the femoral a. traverses through the adductor hiatus in tha adductor magnus m., it’s name changes to the POPLITEAL ARTERY

Question 22

Which of the following structures is NOT located in the popliteal fossa?

Tibial n.

popliteal v.

Femoral a.

popliteal a.

Common fibular n.

Answer 22

Femoral a.

Question 23

structures of the popliteal fossa

Answer 23

tibial nerve.

popliteal vein.

popliteal artery, a continuation of the femoral artery.

small saphenous vein (termination)

common fibular nerve (also known as the common peroneal nerve)

Popliteal lymph nodes and vessels

Question 24

Which of the following structures gives rise to all arterial supply in the thigh, leg, and foot?

Deep a. of the thigh

Femoral a.

popliteal a.

Internal iliac a.

Answer 24

Femoral a.

Question 25

Which of the following pairings are correct regarding innervation to the leg compartments?

Superficial fibula n. = Lateral compartment

Superficial fibula n. = Anterior compartment

Deep fibular n. = Anterior compartment

Deep fibular n. = Posterior compartment

Tibial n. = Posterior compartment

Answer 25

Deep fibular n. = Anterior compartment

Superficial fibular n. = Lateral compartment

Tibial n. = posterior compartment

Question 26

A lesion to the deep fibular nerve will result in which symptom?

Inability to dorsiflex the foot at the ankle joint

Inability to plantarflex the foot at the ankle joint

Inability to stand on tip-toes

Inability to evert the foot at the ankle joint

Answer 26

Inability to dorsiflex the foot at the ankle joint

the deep fibular nerve innervates the anterior compartment of the thigh (tib anterior, extensor digitorum, extensor hallicus, fib tertius) and these are involved in dorsiflexion

Question 27

Which of the following ligaments does the posterior drawer test assess?

Lateral collateral ligament

Medial collateral ligament

Anterior cruciate ligament

Posterior cruciate ligament

Answer 27

Posterior cruciate ligament

Question 28

Which two structures are commonly both damaged in an injury due to a lateral impact to the knee?

Medial collateral ligament

Lateral collateral ligament

Medial meniscus

Lateral meniscus

Answer 28

medial collateral ligament and the medial meniscus. they are commonly injured together cause they are attached

Question 29

Which of the following ligament(s) are located on the lateral aspect of the ankle joint? (3)

Anterior talofibular ligament

Deltoid ligament

Posterior talofibular ligament

Calcaneofibular ligament

Answer 29

The following ligaments are located on the lateral aspect of the ankle joint:

anterior talofibular ligament

posterior talofibular ligament

calcaneofibular ligament