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Levi's Class 2014 > Week 10 Peripheral Nerve Anatomy > Flashcards

Week 10 Peripheral Nerve Anatomy Flashcards

1
Q

The cervical plexus innervates what section of the spine:

A

C1 - C4

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2
Q

The brachial plexus innervates what section of the spine:

A

C5 - T1

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3
Q

The composition of the brachial plexus are:

A
  • Ventral Rami (ROOTS)
  • Trunks
  • Divisions
  • Cords
  • Branches
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4
Q

Number the brachial composition in order.

A 
5 - Ventral Rami (ROOTS)
3 - Trunks 
6 - Divisions
3 - Cords
4 - Branches
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5
Q

The brachial plexus roots, trunks, and divisions are found in the __________ of the neck and ______.

A
  • posterior triangle

- supraclavicular

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6
Q

The brachial plexus cords and branches are found _____ and _______.

A
  • axilla

- Infraclavicular

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7
Q

T/F: The five ventral rami of the brachial plexus may include C4 and T2.

A

True

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8
Q

Where do the roots pass at the scalene muscle?

A

Lateral border

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9
Q

Where does the interscalene space reside:

A

Between the anterior and middle scalene muscle

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10
Q

Injection into the interscalene space will produce a complete block of the ________.

A

Upper extremity

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11
Q

What would occur to the block if there were individual septa.

A

Incomplete block

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12
Q

The ventral division of the brachial plexus innervate the _____ portion.

A

flexor (posterior to clavicle)

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13
Q

The dorsal division of the brachial plexus innervate the ____ portion.

A

extensor portion (posterior to clavicle)

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14
Q

The brachial plexus cords in the axilla of the dorsal division combine to form the ______.

A

Posterior Cords

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15
Q

The brachial plexus cords in the axilla of the ventral division combine to form the ______ and ______ cords.

A
  • lateral

- medial

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16
Q

The brachial plexus branches of the lateral cord innervate what nerves:

A
  • musculocutaneous nerve

- lateral root of median nerve

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17
Q

The brachial plexus branches of the medial cord innervate what nerves:

A
  • medial root of medial nerve

- Ulnar Nerve

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18
Q

The brachial plexus branches of the posterior cord innervate what nerves:

A
  • axilla nerve

- radial nerve

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19
Q

The axillary nerve innervates:

A

-Deltoid and skin covering it

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20
Q

The axillary nerve is formed from ___, passes from _____ to ___, and is ____ to the neck of the humerus.

A
  • C5-C6
  • axilla
  • shoulder
  • posterior
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21
Q

The radial nerve is formed from _____.

A

C5 - T1

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22
Q

List the pathway in order of the radial nerve starting at C5 - T1:

A
  • passes from axilla to arm
  • Descends along shaft of humerous
  • Crosses elbow anterior to lateral epicondyle
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23
Q

What does the radial nerve innervate between axilla and arm:

A
  • long head of tricep
    - posterior brachial cutaneous branch
    - skin covering the muscle
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24
Q

What does the radial nerve innervate along the shaft of the humerous:

A

-Inferior lateral cutaneous branch
posterior arm
-Posterior antebrachial cutaneous branch
posterior surface of forearm

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25
Q

What does the radial nerve innervate along the elbow to lateral epicondyle.

A

-Superficial branch
Dorsum of the hand onto the thumb, index middle
and ring and finger.

-Deep
Many of the muscles of wrist and hand

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26
Q

What would be the radial nerve’s natural response to stimulation:

A
  • Wrist extension
  • Metacarpophalangeal extension
  • Thumb Abduction
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27
Q

The musculocutaneous nerve is formed by:

A

-C5 to C7

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28
Q

Which nerve pierces through the coracobrachilis muscle.

A

-Musculocuatneous

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29
Q

What does the musculocutaneous nerve innervate that descends between brachialis muscle and the biceps brachii muscle

A

Innervates all these muscle

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30
Q

The musculocutaneous nerve at the elbow becomes what nerve:

A

-lateral antebrachial cutaneous nerve

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31
Q

What type of motor response is the musculocutaneous nerve responsible for:

A

bicep flexion

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32
Q

What cervical segment does the median nerve come from:

33
Q

What artery does the median nerve follow:

A

bracial artery

34
Q

What muscles are innervated by the median nerve:

A
  • forearm
  • wrist
  • fingers
  • thumb
  • pronators
  • flexors
  • abduction and oppostion
35
Q

What motor response is the median nerve responsible for:

A
  • wrist flexion
  • fingers flexion
  • Thumb opposition
36
Q

What segment of the spine does the medial cutaneous branch come:

37
Q

What does the medial brachial cutaneous branch innervate:

A

-skin covering the medial surface of the arm

38
Q

What does the medial antebrachial cutaneous branch innervate:

A

-skin on the medial aspect of the forearm

39
Q

What segment of the spine does the ulnar nerve come:

40
Q

What path does the ulnar nerve take starting at C8 to T1:

A
  • Descend with brachial artery
  • Crosses the elbow posterior to medial epicondyle
  • Continues down the forearm
41
Q

What part of the arm does the ulnar nerve innervate:

A
  • Muscles in the wrist, fingers, and THUMB
  • Dorsal and medial surface of hand
  • Dorsam surface of the ring and little finger
42
Q

The motor function of the ulnar nerve:

A
  • Ulnar deviation o the wrist
  • metacarpo-phalangeal flexion
  • thumb adduction
43
Q

The lumbosacral plexus is formed by what segments of the spine:

44
Q

T/F: Lumbosacral plexus may include T12.

45
Q

The iliohypogastric nerve is formed by what segment of the spine:

46
Q

What does the iliohypogastric innervate:

A
  • muscle, skin, PARIETAL PERITONEUM

- skin inferior abdomen and buttocks

47
Q

The ilioinguinal nerve is form by what segment of the spine:

48
Q

The ilioinguinal nerve route from T12 to L1 is:

A
  • travels in abdominal wall
  • pierces posterior wall of the inguinal canal
  • passes through superficial inguinal ring
  • TERMINATES on the anterior scrotum of labia majora
49
Q

What does the ilioinguinal nerve innervate:

A
  • Superior, medial thigh

- Portions of external genitalia

50
Q

The genitofemoral nerve is formed by what segment of the spine:

51
Q

The genitofemoral nerve route from L1 to L2:

A
  • abdominal wall
  • Passes through deep inguinal canal
  • passes through superficial inguinal ring
  • terminates on anterior scrotum or labia majora
52
Q

The genitofemoral innervates:

A
  • Skin covering the femoral hiatus

- Skin on the scrotum or labia majora

53
Q

The pudendal nerve comes from what segment of the spine:

54
Q

The route of the pudendal nerve from S2 to S4

A
  • passes from pelvis through greater sciatic foramen into gluteal region
  • Passses posterior to ischial spine and into perineum
55
Q

What does the pudendal nerve innervate:

A

-muscle and skin of the perineum

56
Q

The lateral femoral cutaneous nerve comes from what segment of the spine:

57
Q

The pathway the lateral femoral cutaneous nerve starting from L2 to L3:

A
  • descends the posterior abdominal wall

- crosses iliac crest into pelvis and down to inguinal ligament and anterior iliac spine

58
Q

The lateral femoral cutaneous innervates what:

A

-skin on the lateral aspect of thigh to the level of the knee

59
Q

The posterior femoral cutaneous nerve is formed by what segment of the spine:

60
Q

The posterior femoral cutaneous nerve route from S1 to S3 is:

A
  • pelvis to gluteal region

- posterior region

61
Q

What does the posterior femoral cutaneous nerve innervate:

A

-skin posterior to the thigh from hip to midcalf

62
Q

The obturator nerve is formed from what segment of the spine:

63
Q

The route the obturator goes from L2 to L4:

A

-Travels the medial compartment of thigh

64
Q

The obturator nerve innervate

A
  • muscles of the thigh

- medial thigh

65
Q

The obturator nerve motor function:

A
  • controls adduction
  • flexion
  • extension of hip
66
Q

The femoral nerve is formed from what segment of the spine:

67
Q

The femoral route from L2 to L4 is :

A
  • through the pelvis
  • Deep into inguinal ligament
  • Enters anterior compartment of thigh
  • Divides into multiple branches below inguinal ligament
68
Q

What saphenous nerve stems from what other nerve:

A

-femoral nerve

69
Q

What does the femoral nerve innervate:

A

Muscle:

  • rectus femoris
  • vastus lateralis
  • vastus intermedius
  • vastus medialis
  • sartorious

SKIN:
-anterior thigh

70
Q

The sciatic nerve is formed from what segment of the spine:

71
Q

The sciatic nerve is formed by the junction of ____ (anterior) L4 - L5 which is the _____ and the _____(posterior) nerve from L4 - S2.

A
  • tibial nerve
  • largest
  • common peroneal
72
Q

What muscles function does the sciatic nerve control before the popliteal fossa:

A
  • hip extension

- flexion of knee

73
Q

List the peripheral nerves the tibial nerve branches into :

A
  • medial plantar nerve
  • lateral plantar nerve
  • Two branches innervate plantar surface of foot
74
Q

The Sural nerve is formed by:

A

Union of the tibial nerve and common peroneal nerve

follows the saphenous nerve

75
Q

The sural nerve innervates:

A
  • posterior sole of foot
  • posterior heel
  • achilles tendon above ankle)
76
Q

What is the motor response for the tibial nerve:

A
  • plantar flexion of foot and toes

- inversion of foot

77
Q

What is the motor response for the superficial peroneal nerve:

A
  • abduction of the foot

- Eversion of the foot

78
Q

What is the motor response for the deep peroneal nerve:

Levi's Class 2014 (16 decks)

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