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ana > lecture 8 - axilla brachial plexus > Flashcards

lecture 8 - axilla brachial plexus Flashcards

1
Q

axilla walls - apex

A

“armpit”

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2
Q

axilla walls - base

A

formed by skin

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3
Q

anterior wall of the axilla walls?

A

pectoralis major and minor

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4
Q

what forms the lateral wall of the axilla walls?

A

pectoralis minor and major

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5
Q

what forms the medial wall of the axilla walls?

A

serratus anterior and rib cage [4th rib]

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6
Q

what forms the posterior wall of the axilla walls?

A

lat dorsi, subscapularis, teres major

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7
Q

what are the roots of the brachial plexus?

A

anterior rami of…
-c5
-c6
-c7
-c8
-t1

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8
Q

R T D C B

A

R- rami
T -trunk
D - division
C - cords
B- branches

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9
Q

trunk sections..

A

superior, middle, inferior

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10
Q

divisions sections…

A

3 anterior and 3 posterior

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11
Q

cords sections…

A

lateral, posterior, medial

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12
Q

branches sections…

A

5 peripheral nerves

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13
Q

subclavius MA

A
  • depresses and anchors clavicle
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14
Q

subclavius PA

A

junction of first rib and its costal cartilage

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15
Q

subclavius DA

A

inferior surface of middle surface of clavicle

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16
Q

subclavius nerve

A

subclavian nerve [c5.c6] nerve to subclavius

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17
Q

anterior scalene nerve

A

cervical spinal nerve c4 to c6

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18
Q

anterior scalene MA

A
  • flex neck laterally
  • elevates first rib during forced inhalation
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19
Q

middle scalene MA

A
  • flex neck laterally
  • elevates first rib during forced inhalation
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20
Q

what are the IA for the anterior and middle scalenes?

A

first ribs!

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21
Q

middle scalene nerve

A

anterior rami of cervical spinal nerves

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22
Q

posterior scalene MA

A

flex neck laterally
elevated SECOND rib during forced inhalation

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23
Q

posterior scalene IA

A

external border of 2nd rib

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24
Q

what is thoracic outlet syndrome?

A

compression of nerves, arteries, and veins in thoracic outlet

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25
Q

how does thoracic outlet occur?

A

occurs via compression in space between the clavicle and 1st rib, pec minor, or the presence of a cervical rib

26
Q

quadrangular space

A

an anatomical conduit for neurovascular structures to pass from anterior axillary region to posterior scapular region

27
Q

quadrangular space - inferior margin

A

teres minor

28
Q

quadrangular space - superior margin

A

teres major

29
Q

quadrangular space - lateral margin

A

long head of the triceps brachii

30
Q

quadrangular space - contents

A
  • posterior circumflex humeral artery and vein
  • axillary nerve
31
Q

triangular space margins
medial margin:
superior margin:
inferior margin:

A

medial margin: long head of biceps brachii
superior margin: teres major
inferior margin: teres minor

32
Q

triangular space contents

A

circumflex scapular artery and vein

33
Q

triangular interval
margins
lateral margins:
inferior margin

A

lateral margin: long head of triceps brachii & shaft of humerus
inferior margin: teres major

34
Q

triangular interval contents

A

profunda brachii artery & radial nerve

35
Q

what is the only synovial joint articulation between UE and axial skeleton?

A

sternoclavicular joint

36
Q

what are the 3 muscles of the flexor compartment?

A

BBC
B - brachialis
B - iceps brachii
C - coracobrachialis

37
Q

main blood supply of UE?

A

brachial artery

38
Q

what is the main action of the biceps brachii?

A

supination of the arm

39
Q

Biceps brachii MA

A
  • *supination of the arm
  • flexes forearm
  • short head resists dislocation of shoulder
40
Q

biceps brachii PA

A
  • Short head: coracoid process
  • Long head: supraglenoid tubercle & labrum
41
Q

biceps brachii DA

A

radial tuberosity and fascia of forearm via bicipital aponeurosis

42
Q

biceps brachii nerve

A

musculocutaneous nerve (c5,c6*,c7)

43
Q

what muscles attach to the coracoid process?

A

coracoid brachialis
biceps brachii short head
pectoralis minor

44
Q

coracobrachialis MA

A
  • flexes scapula
  • adduct shoulder
  • resists dislocation of shoulder
45
Q

coracobrachialis PA

A

coracoid process

46
Q

coracobrachialis DA

A

middle third of medial surface of humerus

47
Q

coracobrachialis nerve

A

musculocutaneous nerve c5,c6*,c7

48
Q

who is the skrongest flexor of the elbow

A

brachialis

49
Q

brachialis MA

A

flexes elbow in all positions - humorolnar joint

50
Q

brachialis PA

A

distal half of anterior surface of humerus

51
Q

brachialis DA

A

ulnar tuberosity and coronoid process of ulna

52
Q

brachialis nerves

A
  • musculocutaneous nerve (C5 & c6) & small branch from radial (c5 & c7)
53
Q

Triceps brachii MA

A

chief extensor of forearm/elbow
long head resists dislocation of humerus, especially during adduction

54
Q

Triceps brachii PA

A

long head: infraglenoid tubercle
lateral head: posterior humerus, superior to radial groove
medial head: posterior humerus, inferior to radial groove

55
Q

Triceps brachii DA

A

olecranon of ulna

56
Q

Triceps brachii nerve

A

radial nerve (c6,c7,c8)

57
Q

what nerve supplies the entire posterior compartment?

A

radial nerve

58
Q

deep radial nerve changes name to…

A

posterior interosseous nerve [PIN]

59
Q

radial nerve levels

A

c5.c6.c7.c8.t1

60
Q

musculocutaneous level

A

c5.c6.c7

61
Q

axillary nerve levels

A

c5.c6

ana (16 decks)

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