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anatomy med school > brachial plexus > Flashcards

brachial plexus Flashcards

1
Q

cord level of dorsal scapular nerve

A

c5

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2
Q

dorsal scapular nerve innervates what muscles?

A
  • levator scapulae
  • rhomboid minor
  • rhomboid major
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3
Q

origin of suprascapular nerve

A

c5-6

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4
Q

suprascapular nerve innervates what muslces?

A
  • surpaspinatus

- infraspinatus

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5
Q

origin of long thoracic nerve

A

c5-7

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6
Q

long thoracic nerve innervates what muscle?

A

serratus anterior

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7
Q

origin of nerve to subclavius

A

c5-6

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8
Q

nerve to subclavius innervates what muscles?

A

subclavius

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9
Q

origin of upper subscapular nerve

A

c5

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10
Q

upper subscapular nerve innervates what muscle?

A

subscapularis

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11
Q

origin of thoracodorsal nerve

A

c6-8

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12
Q

thoracodorsal nerve innervates what muscle?

A

latissimus doris

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13
Q

origin of lower subscapular nerve

A

c6

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14
Q

lower subscapular nerve innervates what muscle?

A

teres major

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15
Q

origin of medial pectoral nerve

A

c8-t1

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16
Q

medial pectoral nerve innervates what muscles?

A

pectoralis major

pectoralis minor

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17
Q

origin of lateral pectoral nerve

A

c5-7

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18
Q

lateral pectoral nerve innervates what muscle?

A

pectoralis major

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19
Q

origin of medial brachial cutaneous

A

c8-t1

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20
Q

cutaneous branch of medial cutaneous?

A

medial brachial cutaneous nerve

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21
Q

origin of medial antebrachial cutaneous

A

c8-t1

22
Q

cutaneous branch of medial antebrachial cutaneous?

A

medial antebrachial cutaneous nerve

23
Q

origin of musculocutaeous nerve?

A

c5-7

24
Q

musculocutaeous nerve innervates what muscles?

A
  • coracobrachialis
  • biceps brachii
  • brachialis
25
Q

cutaneous branch of musculocutaeous nerve?

A

lateral antebrachial cutaneous nerve

26
Q

origin of axillary nerve

A

c5-6

27
Q

axillary nerve innervates what muscles?

A
  • deltoid

- teres minor

28
Q

cutaneous branch of axillary nerve?

A

superior lateral brachial cutaneous nerve

29
Q

origin of radial nerve

A

c5-t1

30
Q

radial nerve innervates what muscles?

A
  • brachialis
  • triceps brachii
  • anconeus
  • supinator
  • brachioradialis
  • abductor pollicis longus
  • extensor arm muscles (will learn later)
31
Q

cutaneous branches of radial nerve?

A
  • inferior lateral brachial cutaneous nerve
  • posterior brachial cutaneous nerve
  • posterior antebrachial cutaneous nerve
  • superficial branch of radial nerve
32
Q

origin of median nerve

A

lateral root = c6-7

medial root = c8-t1

33
Q

median nerve innervates what muscles?

A
  • pronator teres
  • pronator quadratic
  • palmaris longus
  • flexor arm/ hand muscles (will learn later)
  • abductor pollicis brevis
  • 1st and 2nd lumbricals
34
Q

cutaneous branches of median nerve?

A
  • recurrent palmar branch of median nerve
  • common palmar digital nerves
  • proper palmar digital nerves
35
Q

origin of ulnar nerve

A

c8-t1

36
Q

ulnar nerve innervates what muscles?

A
  • flexor muscles of the hand (will learn later)

- 3rd and 4th lumbricals

37
Q

cutaneous branches of ulnar nerve?

A
  • deep branch of ulnar nerve
  • dorsal branch of ulnar nerve
  • dorsal digital nerves
  • common palmar digital nerves
  • proper palmar digital nerves
38
Q

mechanism of hyperabduction syndrome

A
  • prolonged shoulder hyperabduction

- causes compression of neurovascular structures as they pass under coracoid process and pectoralis minor tendon

39
Q

symptoms of hyperabduction syndrome

A

extremity numbness and paresthesia

40
Q

aneurysm of axillary artery

A
  • compresses trunks of brachial plexus

- causes pain and anesthesia

41
Q

axillary lymph node dissection

A
  • needed for staging and determining treatment for cancer

- risk damage to long thoracic nerve and thoracodorsal nerve

42
Q

winged scapula

A
  • paralyzed long thoracic nerve

- pushes medial portion of scapula out of the back

43
Q

erb-duchesse palsy

A
  • deltoid, biceps, and brachialis are paralyzed
  • upper limb is adducted
  • arm is medially rotated
  • elbow is extended
  • damage to musculocutaeous nerve
44
Q

klumpke paralysis

A
  • “claw hand” deformity

- potential for horner’s syndrome: if present, there is miosis

45
Q

dermatome

A

region of skin innervated by GSA axons from a SINGLE spinal nerve root

46
Q

cutaneous nerve

A

supplies an area of skin that is related to peripheral nerve; contains fibers from SEVERAL individual spinal nerves

47
Q

injury to musculocutaneous n. damages what muscles?

A

muscles of anterior arm/flexor of forearm

48
Q

injury to axillary n. damages what muscles?

A

shoulder muscles

49
Q

injury to radial n. damages what muscles?

A

muscles of posterior arm and forearm/extensors

50
Q

injury to median n. damages what muscles?

A

muscles of the anterior forearm/flexors of hand and thumb

51
Q

injury to ulnar n. damages what muscles?

A

muscles of the medial forearm and hand/flexors of hands and digits

anatomy med school (3 decks)

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