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Anatomy Block 1 > Arm, Cubital Fossa and Flexor Forearm > Flashcards

Arm, Cubital Fossa and Flexor Forearm Flashcards

1
Q

The arm is encased in brachial fascia that is continuous proximally with ____ and inserts ____

A

1) continues proximally with axillary and pectoral fascias

2) attaches distally to the humeral epicondyles and olecranon of the ulna

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2
Q

What is the ligament in the wrist that prevents “bowstringing”?

A

palmar carpal ligament

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3
Q

the posterior medial epicondyle bears a grove for which nerve?

A

ulnar n.

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4
Q

which bone is longer: ulna or radius?

A

ulna

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5
Q

what is the tough, strong and fibrous sheaet that unites the ulna and radius?

A

interosseous membrane

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6
Q

What two ligaments reinforce and stabilize the elbow joint?

A

radial collateral ligaments and ulnar collateral ligaments

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7
Q

what holds the proximal radioulnar joint in place?

A

annular ligament

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8
Q

The three muscles that form the flexor compartment of the arm are:

A

1) Biceps brachii
2) Brachialis
3) Coracobrachialis

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9
Q

Biceps brachii short head: origin

A

coracoid process

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10
Q

Biceps brachii long head: origin

A

long head of supraglenoid tubercle

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11
Q

The tendon of long head transversesthe glenohumeral joint and intertubercular groove where it is held in place by the

A

transverse humeral ligament

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12
Q

Biceps brachii: insertion

A

radial tuberosity and forearm fascia via bicipital aponeurosis

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13
Q

Biceps brachii: innervation

A

musculocutaneous nerve

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14
Q

Biceps brachii: actions

A

flex supine forearm

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15
Q

Coracobrachialis: Origin

A

coracoid process

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16
Q

Coracobrachialis: Insertion

A

medial humerus (middle 1/3)

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17
Q

Coracobrachialis: Innervation

A

musculocutaneous nerve

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18
Q

Coracobrachialis: actions

A

Flexes and Adducts arm at glenohumeral joint

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19
Q

Name the muscle that is deep to the biceps and cross the elbow joint?

A

Brachialis

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20
Q

Brachialis: Origin

A

distal half of anterior humerus

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21
Q

Brachialis: Insertion

A

Coronoid process and ulnar tuberosity

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22
Q

Brachialis: Innervation

A

Musculocutaneous nerve

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23
Q

Brachialis: Actions: Actions

A

Flexes in all position

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24
Q

What is the only extensor muscles int he posterior compartment of the arm?

A

Triceps Brachii

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25
Q

Triceps Brachii- Long head: Origin

A

infraglenoid tubercle

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26
Q

Triceps Brachii- Lateral head: Origin

A

from posterior humerus superior to the radial groove

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27
Q

Triceps Brachii- Medial head: Origin

A

from posterior humerus inferior to the radial groove

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28
Q

Triceps Brachii: Inserition

A

Olecranon of the ulna and forearm fascia

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29
Q

Triceps Brachii: Innervation

A

Radial Nerve

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30
Q

Triceps Brachii: Actions

A

Major extensor of the elbow joint

Long head- adducts at the glenohumeral joint

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31
Q

What are the 4 superficial muscles of the flexor forearm?

A

Pronator Teres
Flexor Carpi Radialis
Palmarus Longus
Flexor Carpi Ulnaris

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32
Q

The intermediate muscle of the flexor forearm is called?

A

Flexor Digitorum Superficialis

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33
Q

The deep muscles of the flexor forearm are:

A

Flexor pollicis longus
Flexor Digitorum profundus
Pronator quadratus

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34
Q

The superficial and intermediate muscles arise from?

A

the medial epicondyle

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35
Q

Pronator Teres: Origin

A

humeral head of medial epicondyle via common flexor tendon; ulnar head from coronoid process

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36
Q

Pronator Teres: Insertion

A

middle of lateral radius

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37
Q

Pronator Teres: Innervation

A

Median Nerve

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38
Q

Pronator Teres: Actions

A

Pronates and flexes forearm at elbow

39
Q

Flexor Carpi Radialis: Origin

A

medial epicondyle of humerus via common flexor tendon

40
Q

Flexor Carpi Radialis: Insertion

A

Base of 2nd metacarpal

41
Q

Flexor Carpi Radialis: Innervation

A

Median Nerve

42
Q

Flexor Carpi Radialis: actions

A

flexes and aBducts

43
Q

Palmaris Longus: Origin

A

medial epicondyle of humerus via common flexor tendon

44
Q

Palmaris Longus: Insertion

A

Flexor retinaculum and apex of palmar aponeurosis

45
Q

Palmaris Longus: Innervation

A

Median Nerve

46
Q

Palmaris Longus: Actions

A

Flex hand at wrist; tenses palmar aponeurosis

47
Q

Flexor Carpi Ulnars: Origin

A

medial epicondyle of humerus via common flexor tendon

48
Q

Flexor Carpi Ulnars: Insertion

A

Pisiform, hook of hamate and 5th metacarpal

49
Q

Flexor Carpi Ulnars: Innervation

A

Ulnar n

50
Q

Flexor Carpi Ulnars: Actions

A

Flexes and Adducts hand at wrist

51
Q

Flexor Digitorum Superficialis- Humeral Head: Origin

A

medial epicondyle of humerus via common flexor tendon

52
Q

Flexor Digitorum Superficialis- Radial Head: Origin

A

superhalf of anterior radius

53
Q

Flexor Digitorum Superficialis: Insertion

A

middle phalanges of the medial four digits

54
Q

Flexor Digitorum Superficialis: Innervation

A

Median Nerve

55
Q

Flexor Digitorum Superficialis: Actions

A

Flexes PIP and MP joints

56
Q

Flexor Digatorum Profundus: Origin

A

proximal 3/4 of anterior ulna and interosseous membrane

57
Q

Flexor Digatorum Profundus: Insertion

A

distal phalanges of medial four digits (2-5)

58
Q

Flexor Digatorum Profundus: Innervation

A

medial part of ulnar nerve

lateral part of anterior interosseous nerve (branch of median n)

59
Q

Flexor Digatorum Profundus: Actions

A

Flexes DIP joints

60
Q

Flexor Pollicis Longus: Origin

A

anterior radius and adjacent interosseous membrane

61
Q

Flexor Pollicis Longus: Insertion

A

base of distal phalanx of thumb

62
Q

Flexor Pollicis Longus: Innervation

A

Anterior interosseous nerve

63
Q

Flexor Pollicis Longus: Actions

A

deep flexor of the thumb

64
Q

Pronator Quadratus: Origin

A

distal 1/4 of anterior ulna

65
Q

Pronator Quadratus: Insertion

A

distal 1/4 of anterior radius

66
Q

Pronator Quadratus: Innervation

A

Anterior interosseous nerve

67
Q

Pronator Quadratus: Actions

A

Pronates forearm

68
Q

What is the triangular region anterior to the elbow joint?

A

Cubital Fossa

69
Q

What are the cubital fossa contents?

A

brachila, radial, ulnar arteries and their venae comitantes
biceps brachii tendon
median n

70
Q

Where does the brachial artery begin?

A

inferior border of teres major

71
Q

The largest branch of the brachial artery is the

A

deep brachial artery

72
Q

Where does the deep brachial artery run?

A

It passes posterior to the humerus accompanies the radial nerve in the radial groove to supply the extensor arm

73
Q

What are the arteries that arise form the distal brachial artery and help form elbow anastomosis?

A

super & inferior ulnar collateral arteries

74
Q

The deep brachial after terminates as?

A

radial collateral and middle collateral arteries

75
Q

The brachial artery enters the cubital fossa and terminate by dividing into the?

A

radial and ulnar arteries

76
Q

Where does the ulnar artery run?

A

It passes deep to the pronator trees and descends lateral to the ulnar nerve

77
Q

What does the ulnar nerve supply?

A

medial flexor compartment

78
Q

What are proximal branches of the ulnar artery that join the elbow anastamoses?

A

anterior and posterior ulnar recurrent arteries

79
Q

A short branch of the ulnar artery is the common interosseous artery that splits into anterior and posterior interosseous arteries, What structures does the anterior interosseous artery run with?

A

the anterior interosseous artery joins the anterior interosseous nerve and passes anterior to the interosseous membrane

80
Q

What supplies the lateral flexor compartments?

A

Radial nerve

81
Q

What is the pathway for the cephalic vein?

A

Cephalic vein ascents in the lateral forearm and arm. It enters the deltopectoral groove and triangle and joins the termination of the axillary vein superior to pectoralis minor

82
Q

the Basilic vein ascends from the?

A

medial forearm

83
Q

What does the radial nerve innervate?

A

Triceps (Extensors)

84
Q

What nerve pierces the coracobracialis?

A

musculocutaneous

85
Q

Where does the radial nerve run?

A

It emerges between the brachioradialis and brachialis and enters the cubital fossa anterior to the lateral epicondyle

86
Q

What nerve enters the cubital fossa deep to the bicipital aponeurosis and medial to the brachial artery?

A

Median nerve

87
Q

What muscles does the ulnar n run between?

A

between the heads of flexor carpi ulnaris and the medial half of flexor digitorum profundus

88
Q

What nerves provide sensation to the skin of the medial arm?

A 
Intercostobrachial nerve (lateral cutaneous branch of T2)
Medial cutaneous nerve (medial cord of brachial plexus)
89
Q

What nerves innervate the skin of the lateral arm?

A

superior lateral cutaneous nerve of arm (branch of axillary n)
inferior lateral cutaneous nerve of arm (branch of radial n)

90
Q

What nerves innervate the skin of the posterior arm?

A

superior lateral cutaneous nerve (branch of axillary n)
posterior cutaneous nerve of arm (branch of radial n)
inferior lateral cutaneous nerve of arm (branch of radial n)

91
Q

What innervates the skin of the medial forearm?

A

Medial cutaneous nerve

92
Q

What innervates the skin of the lateral forearm?

A

Lateral cutaneous nerve

93
Q

What innervates the skin of the posterior forearm?

A

Posterior cutaneous nerve

Anatomy Block 1 (6 decks)

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