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Anatomy Exam 2 > L10: Brachium & Cubital Fossa > Flashcards

L10: Brachium & Cubital Fossa Flashcards

1
Q

define fascial septum

A

tough/fibrous CT membranes that divide a limb into compartments

anterior/posterior in brachium

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2
Q

lateral fascia septae

A

from subcutaneous sheath to humerus – lateral

separate ant muscles from lateral side of triceps

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3
Q

medial fascia septae

A

from subcutaneous sheath to humerus – medially

separate ant muscles from medial side of triceps

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4
Q

brachium septae

A

divides arm into ant/post parts

each contain their own muscles, nerves, functions and vascular supply

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5
Q

anterior compartment function and muscles

A

house forearm flexors
biceps brachii
brachialis
coracobrachialis

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6
Q

anterior compartment innervation

A

musculotaneous C5-6

median and ulnar nerve just passing thru

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7
Q

anterior compartment vascular supply

A

brachial artery
basilic vein
venae comitantes

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8
Q

posterior compartment function and muscles

A

house forearm extensors
synergists in forearm supination

triceps and anconeus

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9
Q

posterior compartment innervation

A

radial nerve C7

median/ulnar passing thru

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10
Q

posterior compartment vascular supply

A

deep brachial artery

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11
Q

biceps brachii characteristics

A

multi-joint muscle
muscle insufficiency
long head tendon passes thru bicipital groove and between the lesser n greater tubercles to get to scapula

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12
Q

biceps brachii proximal and distal attachments

A

prox — short: coracoid, long: supraglenoid tubercle

distal — radial tuberosity

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13
Q

biceps brachii actions and innervation

A

flexion and main supinator of forearm
assist arm flexion

musculotaneous C5-6

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14
Q

coracobrachialis characteristics

A

pierced by the musculotaneous nerve

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15
Q

coracobrachialis proximal and distal attachment

A

prox — coracoid process

dis — middle humerus

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16
Q

coracobrachialis action and innervation

A

weak forearm flexion and adduction

musculotaneous C6-7

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17
Q

brachialis proximal and distal attachments

A

prox — distal half of anterior humerus, intermuscular septum

dis — tuberosity of coronoid process

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18
Q

brachialis action and innervation

A

main forearm flexor

musculotaneous C5-6

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19
Q

triceps: mono or multi-joint?

A

lateral and medial — single

long head = multi-joint

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20
Q

triceps proximal attachment

A 
long = Infraglenoid tubercle
lateral = post humerus above radial groove
medial = post humerus below radial groove
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21
Q

triceps: distal attachment and innervation

A

olecranon process

radial nerve C6-8

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22
Q

triceps actions

A

forearm extension

long head assists in arm extension

synergist of biceps flexion so it can perform supination

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23
Q

anconeus proximal and distal attachments

A

prox — post lateral epicondyle

distal — lateral olecranon and superior-post ulna

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24
Q

anconeus action and innervation

A

during pronation of forearm = abducts ulna
during extension of forearm = assists triceps

radial nerve C7-8-T1

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25
Q

cutaneous innervation from axillary nerve

A

superior lateral cutaneous nerve of arm

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26
Q

cutaneous innervation from medial cord

A

medial cutaneous nerve - arm and forearm

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27
Q

cutaneous innervation from musculotaneous terminal nerve

A

lateral antebrachial cutaneous nerve

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28
Q

cutaneous innervation from radial nerve

A

posterior cutaneous nerve – arm and forearm

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29
Q

medial nerve supply

A

supplies flexor muscles on radial side of forearm

does not supply any muscles in arm

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30
Q

course of median nerve

A

travels with brachial artery
upper arm = lateral to art
lower arm = medial to art

crosses cubital fossa superficially

31
Q

crossing of the cubital fossa

A

median nerve and brachial artery cross superficially

deep to/covered by the bicipital aponeurosis

32
Q

radial nerve supply

A 
supplies:
extensor muscles in post arm
extensor muscles of wrist and hand
= all extensor muscles of upper extremity
supplies brachioradialis (flexor)
33
Q

radial nerve: origin to forearm

A

begins post to axillary art
spirals around post humerus in spiral groove
pierces lateral intermuscular septum
enters forearm

34
Q

radial nerve: forearm to branches

A

enters forearm between brachialis and brachioradialis

divides near lateral epicondyle

35
Q

branches of radial nerve

A

superficial and deep branches

36
Q

branches of radial nerve in axilla and upper arm

A

muscular branches to long and medial triceps

post brachial cutaneous nerve

37
Q

branches of radial nerve in radial groove/mid arm

A

lateral and medial triceps
anconeus
lower lat brachial cutaneous nerve
post cutaneous nerve of forearm

38
Q

branches of radial nerve in distal arm

A

branches to: brachioradialis and extensor carpi radialis longus

articular branches at elbow joint

39
Q

ulnar nerve supply

A

supplies flexors on the ulnar side of forearm

40
Q

ulnar nerve course

A 
medial to brachial a
runs w/ superior ulnar collateral art
pierces medial septum
enters post compartment
passes superficial to medial epicondyle
enters forearm
41
Q

ulnar nerve insertion into forearm

A

between two heads of flexor carpi ulnaris

42
Q

musculotaneous nerve in upper arm

A
  • anterior upper arm

- pierces coracobrachialis muscle

43
Q

musculotaneous nerve

A

-innervates muscles on anterior arm and skin on lateral forearm to wrist

44
Q

musculotaneous course

A

pierces fascia lateral to biceps tendon

continues as lateral cutaneous nerve to forearm

45
Q

origin of brachial artery

A

direct continuation of axillary artery

begins at inferior border of teres major

46
Q

branches of brachial artery

A
  1. deep brachial a
  2. superior ulnar collateral
  3. inferior ulnar collateral
47
Q

deep brachial artery

A

major branch off brachial a

48
Q

cubital anastomoses are of the _____ .

A

brachial artery

49
Q

list the 2 cubital anastomoses

A
  1. brachial—ulnar arteries

2. deep brachial—-radial and interosseous arteries

50
Q

brachial —- ulnar arteries

A
  • cubital anastomoses
    1. superior ulnar collateral to posterior ulnar recurrent
  1. inferior ulnar collateral to anterior ulnar recurrent
51
Q

deep brachial — radial and interosseous arteries

A
  • cubital anastomoses
    1. radial collateral to radial recurrent
  1. middle collateral to interosseous recurrent
52
Q

list the 4 main components of forearm venous drainage

A
  1. basilic vein
  2. cephalic vein
  3. median cubital vein
  4. venae comitantes
53
Q

lateral continuation of dorsal venous arch

A

cephalic vein

54
Q

course of lateral continuation of dorsal venous arch

A
  • -cephalic vein–
    1. ascends in superficial fascia
    2. along lateral forearm and arm
    3. thru deltopectoral triangle
    4. dumps into axillary vein
55
Q

medial continuation of dorsal venous arch

A

basilic vein

56
Q

course of medial continuation of dorsal venous arch

A
  • -basilic vein–
    1. ascends in superficial fascia
    2. along medial forearm and to mid arm
    3. pierces deep fascia
    4. ascends in upper arm w/in deep fascia
    5. joins venae comitantes to form axillary vein
57
Q

____ veins form the axillary vein near …. ?

A

basilic and venae comitantes

near the inferior border of teres major

58
Q

has 2 branches that connect cephalic and basilic veins

A

median cubital vein

  • receives blood from median antebrachial vein and palmar hand
  • extends diagonally across bicipital aponeurosis
59
Q

venae comitantes

A
  • 2 veins per 1 artery
  • run parallel
  • countercurrent heat exchange
60
Q

cubital fossa boundaries

A

lateral — brachioradialis

medial — pronator teres

superior base – imaginary line between epicondyles

61
Q

cubital fossa floor

A

supinator and brachialis

62
Q

cubital fossa roof

A
  • skin
  • fascia
  • bicipital aponeurosis
63
Q

major contents of cubital fossa and mnemonic

A

TAN
bicipital tendon

brachial artery

median nerve

64
Q

other contents of cubital fossa

A
  • bifurcation of radial/ulnar a
  • brachial veins
  • aponeurosis
  • radial nerve
65
Q

relationship between radial nerve and deep brachial artery

A

run in spiral groove

66
Q

relationship - brachial artery to median nerve

A

travel together thru arm

cross cubital fossa superficially but covered by bicipital aponeurosis

67
Q

relationship - brachial artery to bicipital aponeurosis

A

aponeurosis covers brachial artery as it crosses the cubital fossa

68
Q

relationship - superior ulnar collateral art to medial epicondyle

A

-travels medial to medial epicondyle and anastomoses w/ posterior ulnar recurrent

69
Q

relationship - inferior ulnar collateral art to medial epicondyle

A

travels medial to medial epicondyle and anastomoses w/ anterior ulnar recurrent

70
Q

relationship - radial collateral art to lateral epicondyle

A

travels lateral to lat epicondyle

71
Q

relationship - median cubital vein to bicipital aponeurosis

A

vein travels diagonally across aponeurosis, superficial to it

72
Q

relationship - ulnar nerve to medial epicondyle

A

runs w/ superior ulnar collateral artery

passes around superficially to med. epicondyle

73
Q

relationship - musculotaneous n to coracobrachialis muscle

A

nerve pierces muscle in upper anterior arm

Anatomy Exam 2 (9 decks)

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