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Anterior Thigh & Leg > The lumbosacral plexus > Flashcards

The lumbosacral plexus Flashcards

1
Q

What branch of the femoral nerve innervates the skin of the anterior thigh, medial aspect of the leg and foot?

A

saphenous nerve

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2
Q

What colour is the deep peroneal nerve?

A

Green

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3
Q

What muscles are supplied by the obturator nerve?

A
  1. gracilis
  2. adductor longus
  3. adductor brevis
  4. anterior portion of adductor magnus
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4
Q

What muscles are innervated by the deep peroneal nerve?

A

All muscles in the anterior leg compartment

tibialis anterior

extensor digitorum longus

extensor halicus longus

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5
Q

What muscles are innervated by the tibial nerve?

A
  • Hamstrings
  • muscles of the posterior leg
  • sole of the foot by the plantar nerves
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6
Q

True or false?

The sciatic nerve innervates everything below the knee apart from the skin on the medial leg

A

True

The skin on the median leg is innervated by the saphenous nerve

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7
Q

What colour is the femoral nerve?

A

Yellow

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8
Q

Which ventral rami make up the lumbar plexus?

A

L1-L5

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9
Q

What nerves are supplied by the S1 nerve root? (5)

A
  1. sciatic
  2. tibial
  3. common peroneal
  4. superior gluteal
  5. inferior gluteal
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10
Q

What nerve roots does the obturator nerve have?

A

L2

L3

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11
Q

What muscles are supplied by the sciatic nerve?

A

The hamstrings

and the posterior portion of adductor magnus

through the tibial component

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12
Q

What nerves are supplied by the S2 nerve root? (4)

A
  1. sciatic
  2. tibial
  3. common peroneal
  4. inferior gluteal
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13
Q

What colour is the tibial nerve?

A

Red - below the knee

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14
Q

What parts of the skin is innervated by the tibial nerve?

A

The posterior leg

the sole of the foot by the sural nerve

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15
Q

Which colour is the sciatic nerve?

A

red

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16
Q

Which nerve innervates the skin of the medial thigh?

A

The obturator nerve

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17
Q

What nerves are supplied by the L2 nerve root? (2)

A
  1. femoral
  2. obturator
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18
Q

What muscles are supplied by the femoral nerve?

A
  1. Quadriceps (rectus femoris, vastus medialis, vastus intermedius, vastus lateralis)
  2. Sartorius
  3. Pactineus
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19
Q

What nerve roots does the inferior gluteal nerve have?

A

L5

S1

S2

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20
Q

Where can the gluteal nerves be located?

A

the gluteal region

21
Q

What muscles are innervated by the superior gluteal nerves?

A

The abductors of the thigh ; gluteus medius and gluteus minimus

22
Q

What nerves are supplied by the L3 nerve root? (2)

A
  1. Femoral
  2. Obturator
23
Q

What colour is the superficial peroneal nerve?

A

purple

24
Q

What nerve innervates the skin on the lateral leg and dorsum of the foot?

A

superficial peroneal nerve

25
Q

What nerve roots does the tibial nerve have?

A

L4

L5

S1

S2

S3

26
Q

What is the sacral plexus made up of?

A
  • The lumbosacral trunk (L4 & L5)
  • Ventral rami of S1-S3
27
Q

What 2 muscles are innervated by the superficial peroneal nerve?

A
  • peroneus longus
  • peroneus brevis
28
Q

Which 2 nerves combine to make the sciatic nerve?

A
  1. tibial nerve
  2. common peroneal nerve
29
Q

Where is the obturator nerve located?

A

The medial compartment of the thigh

30
Q

True or false?

The gluteal nerves don’t innervate the skin at all

A

True

31
Q

What skin is innervated by the deep peroneal nerve?

A

the 1st webspace

32
Q

Which 2 branches of the tibial nerve innervate the:

1) muscles in the sole of the foot
2) the skin in the sole of the foot

A
  1. the plantar nerves
  2. the sural nerve
33
Q

What does the lumbosacral plexus consist of?

A

The lumbar plexus

the sacral plexus

34
Q

What nerve roots does the common peroneal nerve have?

A

L4

L5

S1

S2

35
Q

What nerves are supplied by the S3 nerve root? (2)

A
  1. sciatic
  2. tibial
36
Q

What colour is the obturator nerve?

A

Blue

37
Q

Where is the femoral nerve located?

A

In the anterior compartment of the thigh

38
Q

Where can you locate the deep peroneal nerve?

A

The anterior nerve

39
Q

What nerve roots does the sciatic nerve have?

A

L4

L5

S1

S2

S3

40
Q

What is a plexus and why do we have it?

A
  1. a network of nerves derived from nerve roots
  2. allows multiple nerve roots to enter a single peripheral nerve
41
Q

What colour is the deep peroneal nerve?

A

Green

42
Q

What muscle does the inferior gluteal nerve innervate?

A

gluteus maximus

43
Q

What nerves are supplied by the L5 nerve root? (5)

A
  1. sciatic
  2. tibial
  3. common peroneal
  4. superior gluteal
  5. inferior gluteal
44
Q

What nerve roots does the superior gluteal nerve have?

A

L4

L5

S1

45
Q

What nerve roots does the femoral nerve have?

A

L2

L3

L4

46
Q

What colour is the femoral nerve?

A

Yellow

47
Q

Where can you locate the superficial peroneal nerve?

A

the lateral leg

48
Q

What nerves are supplied by the L4 nerve root? (5)

A
  1. femoral
  2. sciatic
  3. tibial
  4. common peroneal
  5. superior gluteal
49
Q

What is a nerve root?

A
  • The vertebral level whereby a nerve branches off from the spinal cord
  • nerve roots connect peripheral nervous system to central nervous system
  • brain uses vertebral level to map out areas of the body

Anterior Thigh & Leg (7 decks)

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