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2. HLTH 109 > Nerve supply: upper limb > Flashcards

Nerve supply: upper limb Flashcards

1
Q

name the 5 divisions of the brachial plexus:

A

roots - trunks - divisions - cords - terminal nerves

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2
Q

which spinal nerves make up the brachial plexus:

A

C5,6,7,8 and T1

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3
Q

brachial plexus position of: roots

A
  • C5 and C6 join
  • C7 single
  • C8 and T1 join
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4
Q

brachial plexus position of: trunks

A

superior, middle inferior trunks

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5
Q

brachial plexus position of: divisions

A
  • superior, middle and inferior trunk converge to form posterior
  • middle and superior converge
  • inferior has another branch
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6
Q

brachial plexus position of: cords

A
  • lateral
  • posterior
  • medial cord
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7
Q

brachial plexus position of: terminal

A
  • posterior cord forms radial and axillary nerves
  • lateral and medial cords join to form median nerve
  • lateral cord make musculocutaneous n.
  • medial cord form ulnar nerve
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8
Q

M of brachial plexus:

A
  • musculocutaneous
  • median n
  • ulnar n
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9
Q

where does the clavicle divide the brachial plexus:

A

diagonally at the divisions

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10
Q

brachial plexus branches off: roots

A

C5:

  • dorsal scapular n,
  • cont. to phrenic nerve

C5,6,7 make long thoracic n

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11
Q

brachial plexus branches off: trunks

A

superior trunk:

  • suprascapular n
  • nerve to subclavius
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12
Q

brachial plexus branches off: divisions

A

none

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13
Q

brachial plexus branches off:

lateral cord

A

lateral cord:

  • lateral pectoral n
  • musculocutaneous n
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14
Q

brachial plexus branches off: posterior cord

A

posterior cord:

  • axillary
  • superior subscapular n
  • thoracodorsal n
  • inferior subscapular n
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15
Q

brachial plexus branches off: medial cord

A

medial cord:

  • medial pectoral
  • medial cutaneous n. of arm
  • medial cutaneous n. of forearm
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16
Q

origin and contributions: musculocutaneous n

A
  • lateral cord

- C5, 6, 7 cont

17
Q

origin and contributions: median nerve

A
  • from medial and lateral cords

- C6, 7, 8 and T1

18
Q

origin and contributions: radial nerve

A
  • from posterior cord

- C5- T1

19
Q

origin and contributions: ulnar nerve

A
  • from medial cord

- C8 and T1

20
Q

origin and contributions: axillary nerve

A
  • posterior cord

- C5, 6

21
Q

musculocutaneous n: motor supply

A

muscles: ant compartment of arm

22
Q

musculocutaneous n: sensory supply

A

skin, lateral aspect of forearm

23
Q

median n: motor supply

A
  • muscles: ant com of forearm EXCEPT FCU, medial half of FDP
  • thenar mm
  • lateral 2 lumbricals
24
Q

median n: sensory supply

A
  • palmar surface of lateral 3 and half digits
  • lateral palm
  • middle wrist
25
Q

ulnar n: motor supply

A
  • FCU
  • medial half of FDP
  • all intrinsic hand muscles EXCEPT thenar mm and lateral 2 lumbricals
26
Q

ulnar n: sensory supply

A
  • skin of palmar and dorsal surfaces of 1 and half digits

- associated palm and wrist

27
Q

axillary n: motor supply

A

deltoid, teres minor

28
Q

axillary n: sensory supply

A

skin over upper and lateral arm

29
Q

radial n: motor supply

A
  • all muscles in post com of arm/ forearm (even branch to brachialis)
30
Q

radial n: sensory supply

A
  • skin on posterior arm and forearm
  • lower lateral arm
  • dorsal lateral surface of hand
31
Q

eg. injury to brachial plexus

A
  • affects movements and cutaneous sensations in upper limb
  • cause by stretching, disease and wound and (excessive increase in angle) posterior triangle high or axilla
  • paralysis and anaesthesia
32
Q

define dermatomes:

A
  • area of skin supplied by single spinal nerve

- overlaps but can be used to test spinal cord/ nerve damage

33
Q

define myotomes:

A
  • skeletal muscle supplied by single spinal nerve

- more difficult to test

2. HLTH 109 (29 decks)

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