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Peripheral nerve innervations > Upper Extremity > Flashcards

Upper Extremity Flashcards

1
Q

Trapezius innervation (root, peripheral nerve)?

A

C3, C4 - spinal accessory nerve

Key Clinical point: most often abnormal in spinal accessory lesions caused by local surgery, with sparing of the SCM

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2
Q

Sternocleidomastoid (SCM) innervation (root, peripheral nerve)?

A

C3, C4 - spinal accessory nerve

*Most often involved in spasmodic torticollis

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3
Q

Rhomboids innervation (root, peripheral nerve)

A

C4, C5 - Dorsal scapular nerve

*dorsal scapular nerve arrises proximal to brachial plexus

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4
Q

Supraspinatus innervation (root, trunk, peripheral nerve)

A

C5, C6 - upper trunk, suprascapular nerve

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5
Q

Infraspinatus innervation (root, trunk, peripheral nerve)?

A

C5, C6 - upper trunk, suprascapular nerve

*Passes through spinoglenoid notch

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6
Q

Biceps brachii innervation (root, trunk, cord, peripheral nerve)?

A

C5, C6 - upper trunk, lateral cord, musculocutaneous nerve

*Brachialis also innervated by musculocutaneous n., however not as accessible as biceps

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7
Q

Deltoid innervation (root, trunk, cord, peripheral nerve)?

A

C5, C6 - upper trunk, posterior cord, axillary nerve

*Motor unit action potentials may have increased polyphasia in normal subjects

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8
Q

Teres minor innervation (root, trunk, cord, peripheral nerve)?

A

C5, C6 - upper trunk, posterior cord, axillary nerve

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9
Q

Brachioradialis innervation (root, trunk, cord, peripheral nerve)?

A

C5, C6 - upper trunk, posterior cord, radial nerve

*May be abnormal in lesions of radial nerve at or proximal to spiral groove

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10
Q

Serratus Anterior innervation (root, peripheral nerve)?

A

C5, C6, C7 - long thoracic nerve

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11
Q

Pectoralis Major innervation (root, trunk, cord, peripheral nerve)?

A

C5, C6, C7, C8, T1

  • upper, middle, and lower trunks
  • medial and lateral cords
  • medial pectoral nerve (sternal) - medial cord C8, T1
  • lateral pectoral nerve (clavicular) - lateral cord C5, C6, C7
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12
Q

Pronator teres innervation (root, trunk, cord, peripheral nerve)?

A

C6, C7 - upper/middle trunk, lateral cord, median nerve

*May be spared in pronator syndrome

*Spared in AIN syndrome

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13
Q

Flexor carpi radialis (FCR) innervation (root, trunk, cord, peripheral nerve)?

A

C6, C7 - upper/middle trunk, lateral cord, median nerve

*spared in AIN syndrome

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14
Q

Extensor Carpi Radialis Longus (ECRL) innervation (root, trunk, cord, peripheral nerve)?

A

C6, C7 - upper/middle trunks, posterior cord, radial nerve

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15
Q

Triceps brachii innervation (root, trunk, cord, peripheral nerve)?

A

C6, C7, C8 - upper/middle trunks, posterior cord, radial nerve

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16
Q

Anconeus innervation (root, trunk, cord, peripheral nerve)?

A

C6, C7, C8 - upper/middle/lower trunk, posterior cord, radial nerve

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17
Q

Latissimus dorsi innervation (root, trunk, cord, peripheral nerve)?

A

C6, C7, C8 - upper/middle/lower trunk, posterior cord, thoracodorsal nerve

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18
Q

Extensor carpi ulnaris innervation (trunk, cord, peripheral n.)?

A

C7, C8 - middle/lower trunk, posterior cord, radial nerve, posterior interosseous nerve (deep branch of radial nerve)

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19
Q

Extensor indices proprius (EIP) innervation (root, trunk, cord, peripheral nerve)?

A

C7, C8 - middle/lower trunks, posterior cord, radial nerve → posterior interosseous nerve

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20
Q

Extensor digitorum communis (EDC) innervation (root, trunk, cord, peripheral nerve)?

A

C7, C8 - middle/lower trunks, posterior cord, radial nerve, posterior interosseous nerve (PIN)

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21
Q

Flexor digitorum superficialis (FDS) innervation (root, trunk, cord, peripheral nerve)?

A

C7, C8 - middle/lower trunk, medial/lateral cord, median nerve

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22
Q

Pronator Quadratus innervation (root, trunk, cord, peripheral nerve)?

A

C7, C8, T1 - middle/lower trunks, latera/medial cords, median nerve → anterior interosseous nerve

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23
Q

Flexor Pollicis longus (FPL) innervation (roots, trunk, cord, peripheral nerve)?

A

C7, C8, T1 - middle/lower trunks, lateral/medial cords, median nerve → anterior interosseous nerve

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24
Q

Flexor digitorum profundus (digits 2,3) innervation (root, trunk, cord, peripheral nerve)

A

C7, C8, T1 - middle/lower trunk, medial cord, median nerve → anterior interosseous nerve

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25
Q

Flexor digitorum profundus (digits 4,5) innervation (root, trunk, cord, peripheral nerve)?

A

C7, C8, T1 - middle/lower trunk, medial cord, ulnar nerve

26
Q

Abductor pollicis brevis (APB) innervation (root, trunk, cord, peripheral nerve)?

A

C8, T1 - lower trunk, medial cord, median nerve

27
Q

Flexor pollicis brevis (FPB) innervation (root, trunk, cord, peripheral nerve)?

A

C8, T1 - lower trunk, medial cord, median & ulnar nerves

(The flexor pollicis brevis is mostly innervated by the recurrent branch of the median nerve (C8, T1). The deep part is often innervated by the deep branch of the ulnar nerve.)

28
Q

1st and 2nd lumbricals innervation (root, trunk, cord, peripheral nerve)?

A

C8, T1 - lower trunk, medial cord, median nerve

29
Q

Opponens pollicis innervation (root, trunk, cord, peripheral nerve)?

A

C8, T1 - lower trunk, medial cord, median nerve

30
Q

Flexor carpi ulnaris (FCU) innervation (root, trunk, cord, peripheral nerve)?

A

C8, T1 - lower trunk, medial cord, ulnar nerve

31
Q

Abductor digiti mini innervation (root, trunk, cord, peripheral nerve)?

A

C8, T1 - lower trunk, medial cord, ulnar nerve

32
Q

First dorsal interosseous muscle innervation (root, trunk, cord, peripheral nerve)?

A

C8, T1 - lower trunk, medial cord, ulnar nerve

33
Q

3rd and 4th lumbricals innervation (root, trunk, cord, peripheral nerve)?

A

C8, T1 - lower trunk, medial cord, ulnar nerve

34
Q

Interosseous muscles innervation (root, trunk, cord, peripheral nerve)?

A

C8, T1 - lower trunk, medial cord, ulnar nerve

3 PADs, 4 DABs

Palmar interosseous muscles ADduct, and the Dorsal interosseous muscles ABduct. The axial line goes down the middle of the 3rd digit, towards the palm of the hand (it’s an imaginary line). Both sets of muscles are innervated by the deep branch of the ulnar nerve.

35
Q

Cutaneous innervation?

A

C5, C6 - upper trunk, lateral cord, musculocutaneous nerve → lateral antebrachial cutaneous nerve (LAC)

36
Q

Cutaneous innervation?

A

C8, T1 - lower trunk, medial cord, medial antebrachial cutaneous nerve (MAC)

37
Q

Vastus lateralis innervation?

A

L2, L3, L4 - femoral nerve

38
Q

Vastus medialis innervation (root, peripheral nerve)?

A

L2, L3, L4 - femoral nerve

39
Q

Iliopsoas (iliacus) innervation?

A

L2, L3, L4 - femoral nerve

40
Q

Thigh adductors (gracilis, adductor longus, adductor magnus) innervation?

A

L2, L3, L4 - obturator nerve

41
Q

Tibialis Anterior innervation?

A

L4, L5 - sciatic nerve → common peroneal nerve → deep peroneal nerve

42
Q

Extensor digitorum longus (EDL) innervation?

A

L4, L5 - sciatic nerve → common peroneal nerve → deep peroneal nerve

43
Q

Extensor hallucis longus (EHL) innervation?

A

L4, L5, S1 - sciatic nerve → common peroneal nerve → deep peroneal nerve

44
Q

Extensor digitorum brevis (EDB) innervation?

A

L4, L5, S1 - sciatic nerve → common peroneal nerve → deep peroneal nerve

45
Q

Semimembranosus innervation?

A

L4, L5, S1 - sciatic nerve → tibial division

46
Q

Semitendinosus innervation?

A

L4, L5, S1 - sciatic nerve → tibial division

47
Q

Biceps femoris - long head innervation?

A

L5, S1 - sciatic nerve → tibial division

48
Q

Biceps femoris - short head innervation?

A

L5, S1 - sciatic nerve → peroneal division

49
Q

Gluteus medius innervation?

A

L4, L5, S1 - superior gluteal nerve

50
Q

Gluteus minimus innervation?

A

L4, L5, S1 - superior gluteal nerve

51
Q

Tensor fasiae latae (TFL) innervation?

A

L4, L5, S1 - superior gluteal nerve

52
Q

Peroneus longus innervation?

A

L5, S1 - sciatic nerve → common peroneal nerve → superficial peroneal n.

53
Q

Peroneus brevis innervation?

A

L5, S1 - sciatic nerve → common peroneal nerve → superficial peroneal n.

54
Q

Tibialis posterior innervation?

A

L5, S1 - sciatic nerve → tibial nerve

55
Q

Flexor digitorum longus (FDL) innervation?

A

L5, S1 - sciatic nerve → tibial nerve

56
Q

Gluteus maximus innervation?

A

L5, S1, S2 - inferior gluteal nerve

57
Q

Gastrocnemius - medial head innervation?

A

S1, S2 - sciatic nerve → tibial nerve

58
Q

Gastrocnemius - lateral head innervation?

A

S1, S2 - sciatic nerve → tibial nerve

59
Q

Soleus innervation?

A

S1, S2 - sciatic nerve → tibial nerve

60
Q

Flexor hallicus brevis (FHB) innervation?

A

S1, S2 - sciatic nerve → tibial nerve → medial plantar nerve

61
Q

Abductor hallicus brevis (AHB) innervation?

A

S1, S2 - sciatic nerve → tibial nerve → medial plantar nerve

Peripheral nerve innervations (1 decks)

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