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Anatomy Exam 2: Lectures 8-15 > Lecture 10: Brachium, Cubital Fossa > Flashcards

Lecture 10: Brachium, Cubital Fossa Flashcards

1
Q

What is the facial septa?

A

Touch fibrous connective tissue membranes that divide a limb segment into two or more compartments

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2
Q

Where does the medial intermuscular septum go to and from?

A

from subcutaneous sheet to humerus

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3
Q

What does the medial inter muscular septum separate?

A

muscles of anterior arm from medial side of triceps complex

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4
Q

Where does the lateral intermuscular septum go to and from?

A

from subcutaneous sheath to humerus

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5
Q

What does the lateral inter muscular septum separate?

A

muscles of anterior arm from lateral side of triceps complex

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6
Q

What are the muscles of the anterior brachial compartment?

A

biceps brachii
coracobrachialis
brachialis

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7
Q

What are the functions of the muscles of the anterior brachial compartment?

A

forearm flexors

biceps also flexes shoulder and supinates forearm

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8
Q

What is the innervation of the muscles in the anterior brachial compartment?

A

musculocutaneous nerve

functional neurological level: C5-C6

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9
Q

What nerves are passing through the anterior brachial compartment?

A

median nerve

ulnar nerve

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10
Q

What is the vascularization of the anterior brachial compartment?

A

brachial artery

basilic vein and venae comitantes

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11
Q

What is the biceps brachii?

A

two joint muscle crossing both the glenohumeral and elbow joints

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12
Q

Tendon for long head biceps brachii passes through bicipital groove between ____________ of the humerus

A

lesser and greater tubercles of the humerus

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13
Q

What is the proximal attachment of the biceps brachii?

A

short head from tip of coracoid process

long head from supraglenoid tubercle of scapula

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14
Q

What is the distal attachment of the biceps brachii?

A

tuberosity of radius

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15
Q

What is the action of the biceps brachii?

A

flexion and supination of forearm

assists in forearm flexion

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16
Q

What is the innervation of the biceps brachii?

A

musculocutaneous nerve

C5-6

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17
Q

What is the coracobrachilais?

A

single joint muscle crossing only glenohumeral joint

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18
Q

What pierces the coracobrachilais?

A

musculocutaneous nerve

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19
Q

What is the proximal attachment of the coracobrachilais?

A

tip of coracoid

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20
Q

What is the distal attachment of the coracobrachilais?

A

middle third of medial border of humerus

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21
Q

What is the action of the coracobrachilais?

A

weakly flexes and adducts arm

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22
Q

What is the innervation of the coracobrachilais?

A

musculocutaneous nerve

C6-7

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23
Q

What is the brachialis?

A

single joint muscle crossing only over the elbow joint

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24
Q

What is the proximal attachment of the brachialis?

A

distal half of anterior surface of humerus and inter muscular septum

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25
Q

What is the distal attachment of the brachialis?

A

tuberosity of coronoid process

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26
Q

What is the action of the brachialis?

A

main flexor of forearm

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27
Q

What is the innervation of the brachialis?

A

musculocutaneous nerve

C5-6

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28
Q

What are the muscles of the posterior brachial compartment?

A

triceps brachii: long, lateral, medial head

Anconeus

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29
Q

What is the function of the posterior brachial compartment?

A

forearm extensors
long head of triceps can extend shoulder (brachium)
Synergists in forearm supination

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30
Q

What is the innervation of the posterior brachial compartment?

A

radial nerve

functional neurological level = C7

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31
Q

What are the nerves passing through posterior brachial compartment?

A

median nerve

ulnar nerve

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32
Q

What is the vascularization of the posterior brachial compartment?

A

deep brachial artery

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33
Q

What is the triceps brachii?

A

lateral and medial heads are single joint muscles that cross only the elbow joint
long head is a multipoint muscle crossing both the elbow and shoulder joints

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34
Q

What is the proximal attachment of the triceps brachii long head?

A

infraglenoid tubercle of the scapula

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35
Q

What is the proximal attachment of the triceps brachii lateral head?

A

posterior surface of humerus above the radial groove

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36
Q

What is the proximal attachment of the triceps brachii medial head?

A

posterior surface of humerus below the radial groove

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37
Q

What is the distal attachment of the triceps brachii?

A

olecranon process

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38
Q

What is the action of the triceps brachii?

A

forearm extension

long head also assists in arm extensions

39
Q

What is the innervation fo the triceps brachii?

A

radial nerve

C6-8

40
Q

Anconeus proximal attachment

A

posterior aspect of lateral epicondyle of humerus

41
Q

Anconeus distal attachment

A

lateral surface of olecranon

superior part of posterior surface of ulna

42
Q

Anconeus action

A

abducts ulna during pronation of forearm

assists triceps during forearm extension

43
Q

Anconeus innervation

A

radial nerve

C7-8, T1

44
Q

Where does the superior lateral cutaneous nerve of arm branch from?

A

axillary nerve

45
Q

Where does the medial brachial cutaneous nerve branch from?

A

direct branch from from medial cord

46
Q

Where does the medial ante brachial cutaneous nerve branch from?

A

direct branch from medial cord

47
Q

Where does the lateral ante brachial cutaneous nerve branch from?

A

termination of musculocutaneous nerve

48
Q

Where does the posterior cutaneous nerve of arm branch from?

A

from radial nerve

49
Q

Where does the posterior cutaneous nerve of forearm branch from?

A

radial nerve

50
Q

What does the median nerve supply?

A

flexor muscles on the radial side of the forearm

51
Q

True or false? The median nerve does not supply muscles in the arm.

A

true

52
Q

The median nerve travels with the _______ artery

A

brachial

53
Q

The median nerve crosses the cubital fossa superficially with ______ and deep to _______

A

brachial artery

bicipital aponeurosis

54
Q

What does the ulnar nerve supply?

A

flexor muscles on the ulnar side of the forearm

55
Q

The ulnar nerve runs with the _________ artery

A

superior ulnar collateral artery

56
Q

What does the ulnar nerve pierce?

A

medial intermuscular septum

57
Q

The radial nerve is a _________ branch of the __________ cord of the brachial plexus

A

terminal

posterior

58
Q

What does the radial nerve supply?

A

extensor muscles in posterior compartment of brachium
extensor muscles of wrist and hand
brachioradialis muscle

59
Q

The radial nerve descends ________ to the axillary artery.

A

Posterior

60
Q

What does the radial nerve pierce?

A

lateral intermuscular septum distal to deltoid insertion

61
Q

Radial nerve divides into superficial and deep branches near _________ epicondyle.

A

lateral

62
Q

The radial nerve branches in the axilla in what third of the arm?

A

upper third

63
Q

What are the branches of the radial nerve in the axilla of the upper third of the arm?

A

muscular branch to long head of triceps
muscular branch to medial head of triceps
posterior brachial cutaneous nerve

64
Q

What are the branches of the radial nerve in the radial groove of the middle third of the arm?

A

branch to lateral and medial triceps and ancones
lower lateral brachial cutaneous nerve
posterior cutaneous nerve of the forearm

65
Q

What are the branches of the radial nerve in the distal third of the arm?

A

branch to brachioradialis
branch to extensor carpi radials longus
articular branches to elbow joint

66
Q

What does the musculocutaneous nerve pierce?

A

coracobrachialis in upper half of third of brachium

fascia lateral to biceps tendon

67
Q

What does the musculocutaneous nerve innervate?

A

muscles of anterior brachial compartment

68
Q

what does the musculocutaneous nerve continue as?

A

lateral cutaneous nerve of the forearm

69
Q

What does the lateral cutaneous nerve of the forearm supply?

A

skin on lateral forearm as far as wrist

70
Q

The _____ artery is the direct continuation of the axillary artery

A

brachial

71
Q

Where does the brachial artery begin?

A

inferior border of teres major

72
Q

What is the main branch of the brachial artery?

A

deep brachial artery

73
Q

What are the other branches of the brachial artery?

A

superior ulnar collateral to posterior ulnar recurrent

inferior ulnar collateral to anterior ulnar recurrent

74
Q

The ______ vein is a lateral continuation of dorsal venous arch

A

cephalic

75
Q

What does the cephalic vein pass through?

A

deltopectoral triangle

76
Q

What does the cephalic vein empty into?

A

axillary vein

77
Q

The cephalic vein ascends in the _______ fascia along ______ aspect of forearm and arm

A

superficial

lateral

78
Q

The _______ vein is a medial continuation of dorsal venous arch

A

basilic

79
Q

The basilic vein ascends in the ______ fascia along the ______ aspect of forearm and arm to ____ of arm

A

superficial
lateral
middle

80
Q

What does the basilic vein pierce?

A

deep fascia and ascends in upper aspect of arm in deep fascia

81
Q

Basilic vein joints _______ to form axillary vein

A

venae comitantes

82
Q

What does the median cubital vein connect?

A

basilic and cephalic veins

83
Q

Where does the median cubital vein review blood from?

A

median ante brachial vein

84
Q

What does the median cubital vein drain?

A

blood from palmar hand

85
Q

What are venae comitantes?

A

veins that parallel arteries

86
Q

How many venae comitantes are there per artery?

A

two

87
Q

What do venae comitantes do?

A

countercurrent heat exchange

88
Q

Lateral boundary of cubital fossa

A

brachioradialis muscle

89
Q

medial boundary of cubital fossa

A

pronator teres muscle

90
Q

superior base of cubital fossa

A

line between two humeral epicondyles

91
Q

floor of cubital fossa

A

supinator and brachilais muscle

92
Q

roof of cubital fossa

A

skin, superficial and deep fascia, bicipital aponeurosis

93
Q

What are the contents of the cubital fossa (lateral to medial)?

A 
biceps tendon
brachial artery
median nerve
bifurcation of radial and ulnar arteries
brachial veins 
bicipital aponeurosis
radial nerve

Anatomy Exam 2: Lectures 8-15 (7 decks)

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