Nerves of the Lower Limb Flashcards Preview

Hugh's Locomotor > Nerves of the Lower Limb > Flashcards

Flashcards in Nerves of the Lower Limb Deck (48):
1

Which nerve supplies gluteus medius and minimus?

Superior gluteal nerve

2

Branching of the lumbar plexus occurs within which muscle?

Psoas major

2

What nerve roots contribute to the sacral plexus

Part of L4 and L5 (called the lumbosacral trunk)

S1-4

3

What nerve roots make up the obturator nerve?

Anterior divisions of L2,3,4

3

Describe the course of the common fibular nerve

It follows the head of biceps laterally (running on its medial side)

Runs superficial to the lateral head of the gastrocnemius

Winds around the neck of the fibula

Enters fibularis longus

4

Which nerve roots make contribute the tibial nerve?

L4,5 and S1-3 - anterior divisions`

4

What is the sensory supply of the deep fibular nerve?

Cleft of 1st toe

5

What is the sensory supply of the superficial fibular nerve?

Lower lateral leg

Dorsum of foot

7

What do L1 fibres innervate?

Skin of the inguinal area, groin and scrotum

9

Describe the course of the femoral nerve

Emerges on the lateral border of psoas

Goes under the inguinal ligament

Divides into terminal branches 1 inch after inguinal ligament

10

Is the femoral nerve in the femoral sheath?

No

11

What is the motor supply of the deep fibular nerve?

EHL

Tibialis anterior

EDL

ED brevis

12

Which nerve supplies the gluteus maximus?

The inferior gluteal nerve

12

What is the sensory innervation of the tibial nerve (name the specific branches)?

Posterior leg - sural nerve

Sole of the foot

13

What is endangered in a neck of tibia fracture?

The common tibial nerve

14

Does the common fibular nerve have a motor supply?

No, splits into deep and superficial branches that do

15

Describe the course of the sciatic nerve

It emerges beneath the piriformis muscle

Travels posterior to the thigh

Descends in the posterior thigh underneath biceps

Splits into terminal branches a the popliteal fossa

16

Pain from which structure can be referred to the inferiomedial patch of skin in the thigh?

The pelvic peritoneum

16

Which nerve supplies the skin on the posterior aspect of the thigh?

The posterior cutaneous nerve of the thigh

17

What is the course of obturator nerve?

Comes out at the medial border of psoas

Travels through the obturator canal

Enters the medial compartment of the thigh

18

Which nerve roots contribute to the femoral nerve?

Posterior divisions of L2,3,4

18

What is the sensory innervation of the obturator nerve?

Inferiomedial aspect of the thigh

19

What is the motor supply of the sciatic nerve?

Hamstrings - the tibial component of the nerve does all them except the short head of the biceps which is by the common fibular component

20

What is the motor supply of the tibial nerve?

Muscles of the posterior compartment of leg and sole of foot

22

Which nerves of the lumber plexus emerge from the medial aspect of Psoas?

Genitofemoral nerve

23

What is the sural nerve only tibial nerve?

No, also gets a contribution from the common fibular nerve

25

What structural feature means that pregnant women and obese people something get tingling on the lateral thigh?

The lateral cutaneous nerve of the thigh runs close to the ASIS and can get wedged against it

25

What is the sensory supply of the femoral nerve and the name of the branches that supply them.

Anteriomedial thigh - medial and intermediate cutaneous branches of the thigh

Medial aspect of knee, leg and ankle - saphenous nerve

26

Which nerve root contribute to the sciatic nerve?

L4,5 and S1-3 - anterior and posterior branches

28

What is the course and branches of the genitofemoral nerve?

Comes out onto the anterior compartment of psoas major

Branches into the femoral branch and genital branch

29

What is the motor innervation the femoral nerve?

Quadraceps

Sartorius

Pectineus (also receives supply from medial compartment)

30

What are the effects of severing the iliohypogastric nerve and ilioinguinal nerve?

Increased chance of inguinal herniation due to loss of the ability to contract the roof of the canal during abdo wall contraction (and increased intra-abdominal pressure)

31

Describe the course of the tibial nerve

Its descent is continuous with that of the sciatic nerve - through the popliteal fossa

Beneath the fibrous arch of the soleus

Descends between the post. and ant compartments of the leg

Hooks posterior to the medial malleolus

Onto the sole of the foot

33

How does the femoral nerve supply the muscles of the anterior compartment of the thigh?

Sends an individual branch to each muscle

34

Which spinal root contribute to the lumbar plexus?

Ventral rami of L1-L4

35

Which nerves of the lumber plexus emerge from the medial border of Psoas?

Obturator nerve

36

What does the genitofemoral nerve supply?

Supplies the area of skin directly beneath the inguinal ligament, over the femoral triangle

37

Which nerve supplies the muscles of the lateral compartment of the leg?

Superficial fibular nerve

38

Which nerves of the lumber plexus emerge from the lateral border of Psoas?

Ilioinguinal and Iliohypogastric

Lateral cutaneous nerve of the thigh

Femoral nerve

40

What are the terminal branches of the sciatic nerve?

The common fibular

The tibial

41

On what muscle does the sacral plexus form?

The piriformis

42

Which nerves of the lumbar plexus run on top of the iliacus muscle?

Lateral cutaneous nerve of thigh

Femoral nerve

43

Why does IM injection given in the lateral thigh now, instead of the superiolateral gluteal region as previous?

Because there is risk that the sciatic nerve splits early and common fibular nerve can come out above the piriformis and be close to that part of the gluteal region

44

How does a damaged common fibular nerve present?

Dropped foot

- inability to dorsiflex, extend or evert the foot 

45

Which nerve roots contribute the common fibular nerve?

L4-5 and S1-2 posterior divisions

46

Which nerve roots contribute to the lateral cutaneous nerve of the thigh?

L2 and L3

 

47

What does the ilioinguinal and iliohypogastric nerves supply?

Structures on the posterior abdo wall

Lower fibres of transversis abdominis and internal oblique

48

Which muscles does the obturator nerve supply?

The adductors and part of pectineus