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Block 12 Ellen > L3: the axilla and brachial plexus > Flashcards

L3: the axilla and brachial plexus Flashcards

1
Q

axilla=

A

armpit

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2
Q

muscle medial to axilla=

A

serratus anterior

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3
Q

muscle posterior to axilla=

A

subscapular muscles

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4
Q

muscles anterior to axilla=

A

pectoral muscles

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5
Q

where is the axilla apex

A

between the first rib and upper border of scapula

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6
Q

contents of axilla (3)

A

axillary vessels
Axillary lymphatics
Brachial plexus

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7
Q

large vein under clavicle=

A

subclavian vein

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8
Q

what 2 structures do axillary lymphatics drain

A

upper limb and breast

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9
Q

5 lymph node groups of axilla

A
  • lateral
  • subscapular
  • pectoral
  • Central
  • Apical
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10
Q

dorsal roots carry

A

sensory information

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11
Q

ventral roots carry

A

motor information

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12
Q

when the spinal cord exits the vertebral column what does it split into

A

dorsal primary ramus and ventral primary ramus

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13
Q

where does the dorsal primary ramus supply sensation and muscles

A

all the way the back

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14
Q

where does the ventral primary rami supply

A

muscles of the anterior body wall and the limbs

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15
Q

how many cervical vertebrae

A

7

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16
Q

how many cervical nerves

A

8

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17
Q

what nerve comes off immediately as the ventral primary rami emerge

A

the long thoracic nerve

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18
Q

what are the ventral primary rami known as

A

the roots of the brachial plexus

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19
Q

superior trunk comes from

A

C5 and C6

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20
Q

middle trunk comes from

A

C7

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21
Q

inferior trunk comes from

A

C8 and T1

22
Q

what do the trunks divide into

A

anterior and posterior divisions

23
Q

what muscles does the anterior division supply

A

all flexors and adductors of the upper limb

24
Q

what muscles does the posterior division supply

A

all extenders and abductors of the upper limb

25
Q

the anterior divisions of the superior and middle trunks fuse to form

A

the lateral cord

26
Q

the inferior trunk anterior division forms

A

the medial cord

27
Q

what forms the posterior cord

A

the posterior divisions of the superior, middle and inferior trunks

28
Q

lateral nerve and medial nerves form an M when they fuse in the middle what 3 nerves come off (lateral–> medial

A

Musculocutaneous
Median
Ulnar

29
Q

2 nerves coming of the posterior cord

A

axillary nerve and radial nerve

30
Q

where does the radial nerve travel

A

down the back of the upper limb and supplies all the extensors of it and the forearm

31
Q

where does the axillary nerve travel

A

wraps around humerus and supplies deltoid

32
Q

3 muscles musculocutaneous nerve supplies

A

coracobrachialis –> adductor
Biceps brachii –> flexor
Brachialis –> flexor

33
Q

where does the median nerve supply

A

flexors of forearm on radial side + thumb

34
Q

where does the ulnar nerve supply

A
  • 2 flexors of forearm

- lots of small muscles in the hand

35
Q

if you get weakness of muscles but not sensation then what HASN’T happened

A

peripheral nerve injury

36
Q

radial nerve injury–>

A
  • weakness of extensors

- Loss of sensation over dorsal web between thumb and index finger

37
Q

shoulder myotome that abducts and laterally rotates

A

C5

38
Q

shoulder Myotome that adducts and medially rotates

A

C6, C7 C8

39
Q

elbow myotome that flexes

A

C5 C6

40
Q

elbow myotome that extends

A

C7, C8

41
Q

Forearm myotome that pronates

A

C6

42
Q

forearm myotome that Supinate

A

C6

43
Q

Wrist only myotome that flexes and extends

A

C6, C7

44
Q

fingers and thumb myotomes that flex and extend

A

C7, 8

45
Q

hand intrinsic muscles

A

T1

46
Q

Erb’s palsy is injury off

A

tears of routes of the brachial plexus

47
Q

what are symptoms are Erb’s palsy baby’s born with at birth

A

paralysis of upper shoulder and arm;

forearm pronates and hand hangs

48
Q

what effect can Erb’s palsy have on limb

A

reduced limb growth

49
Q

what is Klumpke’s paresis

A

tear of the lower roots of the brachial plexus

50
Q

how do you tear the lower roots of the brachial plexus

A

by forcefully abducting the limb

51
Q

what is often damaged in Klumpke’s paresis

A

T1

52
Q

what does T1 supply

A

all intrinsic muscles of the hand and sensation over medial side of forearm

Block 12 Ellen (25 decks)

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