MSK LL Nerves

Question 1

What nerves arise from the lumbar plexus?

Answer 1

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Iliohypogastric, Ilioinguinal, Genitofemoral, Later cutaneous nerve of the thigh, Obturator, Femoral

Question 2

What roots does the lumbar plexus arise from?

Answer 2

T12,L1,2,3,4

Question 3

What nerves arise from the sacral plexus?

Answer 3

Superior and inferior gluteal, sciatic, posterior femoral cutaneous, pudendal and nerves to piriformic, obturator internus and quadrator femoris.

Question 4

What roots does the sacral plexus arise from?

Answer 4

L4,5,S1,2,3,4

Question 5

What does the femoral nerve innervate?

Answer 5

The anterior muscles of the thigh

Question 6

When does the femoral nerve split and what into?

Answer 6

Behind the inguinal ligament

Anterior and posterior branches

Question 7

What is the terminal cutaneous branch of the femoral nerve?

Answer 7

Saphenous nrve

Question 8

What are the nerve roots of the femoral nerve?

Answer 8

L2-L4

Question 9

What are the nerve roots of the sciatic nerve?

Answer 9

L4-S3

Question 10

What does the sciatic nerve innervate?

Answer 10

The muscles of the posterior thigh and the hamstring portion of the adductor magnus

Question 11

When does the sciatic nerve spit? What into?

Answer 11

At the apex of the popliteal fossa. Into the common fibular and tibial nerves

Question 12

What are the roots of the obturator nerve?

Answer 12

L2-L4

Question 13

What does the obturator nerve innervate?

Answer 13

The medial (adductor) compartment of the thigh

Question 14

How does the sciatic nerve leave the pelvis?

Answer 14

Via the greater sciatic foreamen. Inferior to the piriformis muscle

Question 15

When does the obturator nerve split and into what?

Answer 15

As it enters the thigh through the obturator canal. Anterior and posterior divisions.

Question 16

How does the sciatic nerve enter the gluteal nerve?

Answer 16

Via the greater sciatic foreamen

Question 17

Which 2 bones landmarks must you consider when giving intramuscular injections

Answer 17

The highest point of the iliac crest - this gives the point where you draw the line descending vertically.
The horizontal line passes though the vertical line half way between the highest point of the iliac crest and the ishial tuberosity

Question 18

From what nerve does the common fibular nerve arise fro?

Answer 18

Sciatic

Question 19

From what nerve does the tibial nerve arise from?

Answer 19

Sciatic

Question 20

What is the common fibular nerve also known as?

Answer 20

The peroneal

Question 21

What branches does the common fibular nerve split into?

Answer 21

The deep fibular (peroneal) and the superficial fibular (peroneal)

Question 22

What does the common fibular nerve innervate directly?

Answer 22

The biceps femoris and the skin over the upper lateral and lower posterolateral parts of the leg

Question 23

What does the superficial fibular nerve innervate?

Answer 23

The muscles of the lateral compartment of the leg and he vast majority of the skin over the dorsum of the foot

Question 24

What does the deep fibular nerve innervate?

Answer 24

The muscles of the anterior compartment of the leg and a triangular region of skin between the 1st and 2st toes.

Question 25

What are the roots of the common fibular nerve?

Answer 25

L4-S3

Question 26

What are the roots of the tibial nerve?

Answer 26

L4-S3

Question 27

Where does the tibial nerve innervate?

Answer 27

The skin of the posterolateral side of the leg, the lateral side of the foot and the sole of the foot

Question 28

What are the 2 cutaneous branches that arise directly from the common fibular nerve? When?

Answer 28

As it moves over the lateral head of the gastrocnemius muscle - sural commicatin and lateral sural cutaneous nerve

Question 29

What are the roots of the superior gluteal nerve?

Answer 29

L4-S1

Question 30

What are the roots of the inferior gluteal nerve?

Answer 30

L5-S2

Question 31

How does the superior gluteal nerve enter the gluteal region?

Answer 31

Via the greater sciatic foreamen, superior to piriformis

Question 32

How does the inferior gluteal nerve enter the gluteal region?

Answer 32

Via the great sciatic foreamen, inferior to piriformis

Question 33

What does the superior gluteal nerve innervate?

Answer 33

Gluteus medius, minimus and tensor fascia lata

Question 34

What does the inferior gluteal nerve innervate?

Answer 34

Gluteus maximus

Question 35

When does the common fibular nerve split into the the superficial and deep nerves?

Answer 35

After passing through the gap in the fibularis longus