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Anatomy 2 > Week 6 > Flashcards

Week 6 Flashcards

1
Q

The brachial plexus is the innervation to the __ and ___

A

The brachial plexus is the innervation to the shoulder and upper extremity

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2
Q

What forms the brachial plexus?

A

Formed by ventral primary rami C5 – C8 and part of T1

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3
Q

What are the parts that the brachial plexus can be divided into?

A
  • Roots (ventral primary rami)
  • Trunks
  • Divisions
  • Cords
  • Terminal Branches
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4
Q

The cords of the brachial plexus are named in relationship to the ___

A

The cords of the brachial plexus are named in relationship to the axillary artery in the axilla

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5
Q

What are the terminal branches of the brachial plexus?

A
  • Musculocutaneous
  • Axillary
  • Radial
  • Median
  • Ulnar
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6
Q

What roots in the brachial plexus forms the superior trunks?

A

Ventral primary rami of C5 and C6

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7
Q

What roots in the brachial plexus forms the middle trunks?

A

Ventral primary rami of C7

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8
Q

What roots in the brachial plexus forms the inferior trunks?

A

Ventral primary rami of C8 and T1

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9
Q

The 3 posterior divisions of the brachial plexus, forms the ___ cord

A

The 3 posterior divisions of the brachial plexus, forms the posterior cord

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10
Q

The anterior division of the upper and middle trunks of the brachial plexus forms the ___ cord

A

The anterior division of the upper and middle trunks of the brachial plexus forms the lateral cord

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11
Q

The anterior division of the lower trunk of the brachial plexus forms the ____ cord

A

The anterior division of the lower trunk of the brachial plexus forms the medial cord

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12
Q

What terminal branches does the lateral cord give rise to?

A
  • Musculocutaneous nerve

- Lateral part of the Median nerve

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13
Q

What terminal branches does the medial cord give rise to?

A
  • Medial part of the Median nerve

- Ulnar nerve

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14
Q

What terminal branches does the posterior cord give rise to?

A
  • Axillary nerve

- Radial nerve

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15
Q

What are the nerve roots of the phrenic nerve?

A

C3, C4, and C5

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16
Q

Why do we think of the phrenic nerve as part of the brachial plexus?

A

Because of its C5 nerve root

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17
Q

What is the nerve root of the dorsal scapular nerve?

A

C5

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18
Q

What is the nerve root of the long thoracic nerve?

A

C5, C6, C7

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19
Q

What are the other branches of the ventral primary rami?

A
  • Phrenic nerve
  • Dorsal scapular nerve
  • Long thoracic nerve
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20
Q

What are the branches that comes off the upper trunk of the brachial plexus?

A
  • Suprascapular nerve

- Nerve to the subclavius

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21
Q

What are the branches that comes off the middle and lower trunk of the brachial plexus?

A

NONE

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22
Q

What are the branches that comes off the medial cord of the brachial plexus?

A
  • Medial pectoral nerve
  • Medial brachial(arm) cutaneous
  • Medial antebrachial(forearm) cutaneous
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23
Q

What are the branches that comes off the lateral cord of the brachial plexus?

A
  • Lateral pectoral nerve
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24
Q

What are the branches that comes off the posterior cord of the brachial plexus?

A
  • Upper/superior subscapular nerve
  • Lower/inferior subscapular nerve
  • Thoracodorsal nerve
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25
Q

The medial pectoral nerve sends branches to the ____

A

The medial pectoral nerve sends branches to the pec minor

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26
Q

What 2 structures does the lateral pectoral nerve tend to send branches to?

A
  • Deep branch – sternal head of pec major

- Sup branch – clavic head of pec major

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27
Q

What are the nerve roots of the musculocutaneous nerve?

A

C5-C7

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28
Q

What are the nerve roots of the median nerve?

A

C6-C8, T1

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29
Q

What are the nerve roots of the radial nerve?

A

C5- C8, T1

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30
Q

What are the nerve roots of the ulnar nerve?

A

C7-C8, T1

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31
Q

Where do you mostly see the trunks of the brachial plexus?

A

In the inter-scalene space, between middle and anterior scalene

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32
Q

When do the trunks of the brachial plexus becomes divisions?

A

When they pass over the 1st rib

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33
Q

When do the divisions of the brachial plexus becomes cords?

A

Relative to the 2nd part of the axillary artery, behind the 2nd part of pec minor

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34
Q

The musculocutaneous nerve terminates as the ____

A

The musculocutaneous nerve terminates as the lateral antebrachial cutaneous nerve

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35
Q

What type of joint does the interosseous membrane between the radius and ulnar bones create?

A

A fibrous joint

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36
Q

What type of joints are the superior radio-ulnar joint and inferior radio-ulnar joint?

A

Synovial joints

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37
Q

What does the presence of the superior radio-ulnar joint and inferior radio-ulnar joint along with the joint created by the interosseous joint allow?

A

Allows for the radius to rotate around the stationary ulnar, during pronation and supination

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38
Q

The arm is enclosed in a sheath of fascia known as the ___

A

The arm is enclosed in a sheath of fascia known as the brachial fascia

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39
Q

The brachial fascia is continuous with the fascia of the ____ superiorly/proximally and the fascia of the ____ inferiorly/ distally.

A

The brachial fascia is continuous with the fascia of the *axilla superiorly/proximally and the fascia of the forearm inferiorly/ distally. *

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40
Q

The brachial fascia gives rise to ___ and ___ septa that divides the arm into anterior and posterior compartments.

A

The brachial fascia gives rise to medial and lateral intermuscular septa that divides the
arm into anterior and posterior compartments.

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41
Q

The anterior compartment of the arm is the ___ compartment, while the posterior compartment is the ___ compartment

A

The anterior compartment of the arm is the flexor compartment, while the posterior compartment is the extensor compartment

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42
Q

The nerve in the posterior compartment of the arm is the arm is the ___ nerve

A

The nerve in the posterior compartment of the arm is the arm is the radial nerve

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43
Q

The medial intermuscular septum separates the ___ from the ___

A

The medial intermuscular septum separates the basilic vein from the brachial vein and artery

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44
Q

How many muscles are in the arm and where are they?

A
  • 4.

- 3 in the anterior compartment and 1 in the posterior

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45
Q

What are the muscles in the anterior compartment of the arm?

A
  1. Biceps brachii
  2. Coracobrachialis
  3. Brachialis
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46
Q

What are the muscles in the posterior compartment of the arm?

A

Triceps brachii

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47
Q

What is the origin of the biceps long head?

A

Supraglenoid tubercle of the scapula

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48
Q

What is the insertion of the biceps long head?

A

Tuberosity of the radius and bicipital aponeurosis

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49
Q

What is the origin of the biceps short head?

A

Coracoid process of the scapula

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50
Q

What is the insertion of the biceps short head?

A

Tuberosity of the radius and bicipital aponeurosis

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51
Q

What is the innervation of the biceps?

A

Musculocutaneous nerve

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52
Q

What is the action of the biceps?

A

Flexes and supinates forearm

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53
Q

What is the origin of Coracobrachialis?

A

Coracoid process of the scapula

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54
Q

What is the insertion of Coracobrachialis?

A

Middle third of the medial side of the humerus

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55
Q

What is the innervation of Coracobrachialis?

A

Musculocutaneous nerve

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56
Q

What is the action of Coracobrachialis?

A

Flexion and adduction of the arm

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57
Q

What is the origin of brachialis?

A

Distal half of anterior surface of the humerus

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58
Q

What is the insertion of brachialis?

A

Coronoid process and tuberosity of the ulna

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59
Q

What is the innervation of brachialis?

A

Musculocutaneous nerve

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60
Q

What is the action of brachialis?

A

Flexes forearm (elbow)

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61
Q

What is the origin of the long head of the triceps brachii?

A

– Infraglenoid tubercle of the scapula

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62
Q

What is the origin of the medial head of the triceps brachii?

A

Posterior surface of the humerus, inferior to the spiral groove

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63
Q

What is the origin of the lateral head of the triceps brachii?

A

Posterior surface of the humerus, superior to the spiral groove

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64
Q

What is the insertion of the triceps brachii?

A

Olecranon process of the ulna

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65
Q

What is the innervation of the triceps brachii?

A

Radial nerve

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66
Q

What is the action of the triceps brachii?

A

Extends the forearm

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67
Q

___ muscle is a very strong supinator of the arm

A

Biceps brachii muscle is a very strong supinator of the arm

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68
Q

The ___ muscle helps pull down the coracoid process, and tips the scapula. If it overworks, it’ll cause a winging of the scapula

A

The coracobrachialis muscle helps pull down the coracoid process, and tips the scapula. If it overworks, it’ll cause a winging of the scapula

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69
Q

___ muscle is the work horse of the arm

A

Brachialis muscle is the work horse of the arm

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70
Q

The ___ muscle is tested with the forearm supinated

A

The biceps muscle is tested with the forearm supinated

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71
Q

The ___ muscle is tested with the forearm pronated

A

The brachialis muscle is tested with the forearm pronated

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72
Q

The ___ muscle is tested with the forearm mid-pronated/supinated

A

The coracobrachialis muscle is tested with the forearm mid-pronated/supinated

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73
Q

___ muscle is not considered a muscle of the posterior compartment of the arm, because it sits further down below the elbow joint

A

Anconeus muscle is not considered a muscle of the posterior compartment of the arm, because it sits further down below the elbow joint

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74
Q

What is the origin of anconeus?

A

Lateral epicondyle of the humerus

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75
Q

What is the insertion of anconeus?

A

Lateral surface of the Olecranon process and posterior surface of the ulna

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76
Q

What is the innervation of anconeus?

A

Radial n.

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77
Q

What is the action of anconeus?

A

Extension of the forearm

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78
Q

What does the anconeus also help to do?

A

It pulls of capsule of elbow joint to prevent it being pinched during extension

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79
Q

___ nerve supplies all the muscles of the anterior brachium

A

Musculocutaneous nerve supplies all the muscles of the anterior brachium

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80
Q

Where does the musculocutaneous nerve arise from?

A

Arises from the lateral cord of the brachial plexus

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81
Q

___ nerve supplies the posterior muscles of the brachium and continues into the forearm

A

Radial nerve supplies the posterior muscles of the brachium and continues into the forearm

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82
Q

Where does the radial nerve arise from?

A

Arises from the posterior cord of the brachial plexus

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83
Q

The brachial artery gives rise to the ___ artery, which travels to the posterior brachium with the radial nerve to supply the posterior compartment

A

The brachial artery gives rise to the profunda brachii artery, which travels to the posterior brachium with the radial nerve to supply the posterior compartment

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84
Q

How many brachial veins accompanies the brachial artery?

A

2

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85
Q

Where does the terminal branch of the musculocutaneous nerve come out through?

A

Between brachialis and biceps

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86
Q

What are the venous drainage of the arm?

A

Cephalic and basilic veins

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87
Q

__ and ___ are two superficial veins that are located along the lateral and medial
borders of the arm

A

Cephalic and basilic veins are two superficial veins that are located along the lateral and medial borders of the arm

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88
Q

___ vein runs along the anterior lateral surface of the biceps and empties into
the axillary vein near the deltopectoral triangle

A

Cephalic veins runs along the anterior lateral surface of the biceps and empties into the axillary vein near the deltopectoral triangle

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89
Q

___ vein runs along the inferior, medial surface. It enters deep to the brachial fascia at the middle of the arm and becomes the axillary vein

A

Basilic vein runs along the inferior, medial surface. It enters deep to the brachial fascia at the middle of the arm and becomes the axillary vein

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90
Q

___ is the communication of the cephalic and basilic in the cubital fossa

A

Median cubital vein is the communication of the cephalic and basilic in the cubital fossa

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91
Q

___ vein is where nurses like to stick you with their evil needles and take your blood sample for their witchcraft

A

Median cubital vein is where nurses like to stick you with their evil needles and take your blood sample for their witchcraft

92
Q

What is the superior boundary of the cubital fossa?

A

Imaginary line between the epicondyles of the humerus

93
Q

What is the lateral boundary of the cubital fossa?

A

Brachialradialis

94
Q

What is the medial boundary of the cubital fossa?

A

Pronator teres

95
Q

What is the medial boundary of the floor of the cubital fossa?

A

Brachialis

96
Q

What is the lateral boundary of the floor of the cubital fossa?

A

Supinator

97
Q

What is the roof of the cubital fossa?

A

Cubital fascia

98
Q

What are the contents of the superficial layer of the cubital fossa?

A
  1. Basilic vein
  2. Cephalic vein
  3. Median cubital vein
  4. Bicipital aponeurosis
99
Q

What are the contents of the deep layer of the cubital fossa?

A
  1. T – Tendon of the Biceps Brachii (most laterally)
  2. A – Brachial artery (in the middle)
  3. N – Median nerve (most medially)
  4. Also the radial and ulnar nerves can be found near by, but not in the cubital fossa
100
Q

The deep branch of the radial nerve goes in the supinator through the ___

A

The deep branch of the radial nerve goes in the supinator through the arcade of frohse

101
Q

What is the origin of the supinator?

A

Lateral epicondyle of the humerus

102
Q

What is the insertion of the supinator?

A

Lateral, posterior and anterior surfaces of the proximal third of the radius

103
Q

What is the innervation of the supinator?

A

Deep branch of the radial nerve

104
Q

What is the action of the supinator?

A

Supinates the forearm

105
Q

What is the origin of the Brachioradialis?

A

Proximal two-thirds of the lateral supracondylar ridge of humerus

106
Q

What is the insertion of the Brachioradialis?

A

Lateral surface of the distal end of the radius

107
Q

What is the innervation of the Brachioradialis?

A

Radial nerve

108
Q

What is the action of the Brachioradialis?

A

Flexes forearm

109
Q

What are the superficial muscles of the forearm?

A
  • Pronator teres
  • Flexor carpi radialis
  • Palmaris longus
  • Flexor digitorum superficialis
  • Flexor carpi ulnaris
110
Q

What are the deep muscles of the forearm?

A
  • Flexor digitorum profundus
  • Flexor pollicis longus
  • Pronator Quadratus
111
Q

What is the origin of pronator teres?

A

– Medial epicondyle of the humerus and coronoid process of the ulna

112
Q

What is the insertion of pronator teres?

A

Middle of lateral surface of the radius

113
Q

What is the innervation of pronator teres?

A

Median nerve

114
Q

What is the action of pronator teres?

A

Pronates and flexes forearm

115
Q

What is the origin of Flexor carpi radialis?

A

– Medial epicondyle of humerus

116
Q

What is the insertion of Flexor carpi radialis?

A

Base of the second metacarpal bone

117
Q

What is the innervation of Flexor carpi radialis?

A

– Median nerve

118
Q

What is the action of Flexor carpi radialis?

A

Flexes and radial deviates hand

119
Q

What is the origin of palmaris longus?

A

Medial epicondyle of humerus

120
Q

What is the insertion of palmaris longus?

A

Flexor retinaculum and palmar aponeurosis

121
Q

What is the innervation of palmaris longus?

A

Median nerve

122
Q

What is the action of palmaris longus?

A

Flexes hand

123
Q

What is the origin of Flexor digitorum superficialis?

A

Medial epicondyle of the humerus, coronoid process of the ulna and the anterior border of the radius

124
Q

What is the insertion of Flexor digitorum superficialis?

A

– Bodies of the middle phalanges of the medial four digits

125
Q

What is the innervation of Flexor digitorum superficialis?

A

Median nerve

126
Q

What is the action of Flexor digitorum superficialis?

A

Flexes the middle phalanges of the medial four digits, the proximal phalanges and hand

127
Q

What is the origin of Flexor carpi ulnaris?

A

– Medial epicondyle of humerus, olecranon and ulna

128
Q

What is the insertion of Flexor carpi ulnaris?

A

– Pisiform, hook of the hamate and 5th metacarpal

129
Q

What is the innervation of Flexor carpi ulnaris?

A

Ulnar nerve

130
Q

What is the action of Flexor carpi ulnaris?

A

– Flexes hand, ulnar deviates hand

131
Q

What is the origin of Flexor digitorum profundus?

A

Proximal three-fourths of medial and anterior surface of the ulna and interosseous membrane

132
Q

What is the insertion of Flexor digitorum profundus?

A

Base of the distal phalanges of the medial four digits

133
Q

What is the innervation of Flexor digitorum profundus?

A

Medial part is ulnar, Lateral part is median

134
Q

What is the action of Flexor digitorum profundus?

A

Flexes the distal phalanges of the medial four digits

135
Q

What is the origin of Flexor pollicis longus?

A

Anterior surface of the radius and interosseous membrane

136
Q

What is the insertion of Flexor pollicis longus?

A

Base of the distal phalanx of the thumb

137
Q

What is the innervation of Flexor pollicis longus?

A

Anterior interosseous nerve

138
Q

What is the action of Flexor pollicis longus?

A

Flexes phalanges of thumb

139
Q

What is the origin of Pronator Quadratus?

A

– Distal, anterior surface of ulna

140
Q

What is the insertion of Pronator Quadratus?

A

– Distal, anterior surface of the radius

141
Q

What is the innervation of Pronator Quadratus?

A

Anterior interosseous nerve

142
Q

What is the action of Pronator Quadratus?

A

– Pronates the forearm

143
Q

___ nerve enters the forearm via the cubital fossa and travels along the lateral aspect of
the anterior forearm.

A

Median nerve enters the forearm via the cubital fossa and travels along the lateral aspect of the anterior forearm.

144
Q

The median nerve gives off the ___ which runs deep to the superficial muscle of the forearm. It innervates the deep muscles of the forearm.

A

The median nerve gives off the anterior interosseous nerve, which runs deep to the superficial muscle of the forearm. It innervates the deep muscles of the forearm.

145
Q

___nerve passes posterior to the medial epicondyle of the humerus and enters the
forearm medial to the flexor carpi ulnaris

A

Ulnar nerve passes posterior to the medial epicondyle of the humerus and enters the
forearm medial to the flexor carpi ulnaris

146
Q

The ulnar nerve dives deep and runs with the ____ to the wrist

A

The ulnar nerve dives deep and runs with the ulnar artery to the wrist

147
Q

___ nerve enters the forearm by passing anteriorly over the lateral epicondyle of the
humerus

A

Radial nerve enters the forearm by passing anteriorly over the lateral epicondyle of the
humerus

148
Q

The superficial branch of the radial nerve is responsible for ___, and the deep branch of the radial nerve is responsible for
__ and ___ innervation

A

The superficial branch of the radial nerve is responsible for sensory, and the deep branch of the radial nerve is responsible for
motor and joint innervation

149
Q

When does the radial nerve split into superficial and deep branches?

A

Once in the forearm it divides into superficial and deep branches

150
Q

Brachial artery divides into the radial and ulnar arteries in the ___

A

Brachial artery divides into the radial and ulnar arteries in the inferior aspect of the
cubital fossa

151
Q

___ artery runs along the lateral aspect of the anterior surface of the forearm and is the common site for measuring pulse rate

A

Radial artery runs along the lateral aspect of the anterior surface of the forearm and is the common site for measuring pulse rate

152
Q

The radial artery terminates in the hand as ____

A

The radial artery terminates in the hand as part of the palmar arch

153
Q

____ artery arises from the radial artery just distal to the brachial artery

A

Radial recurrent artery arises from the radial artery just distal to the brachial
artery

154
Q

The radial recurrent artery ascends the arm to anastomose with the____ a branch of the profunda brachii

A

The radial recurrent artery ascends the arm to anastomose with the radial collateral artery a branch of the profunda brachii

155
Q

___ artery arises in the inferior cubital fossa and descends the anterior, medial aspect of
the forearm and enters the hand to form part of the palmar arch

A

Ulnar artery arises in the inferior cubital fossa and descends the anterior, medial aspect of the forearm and enters the hand to form part of the palmar arch

156
Q

What are the branches that the ulnar artery gives off?

A
  • Anterior ulnar recurrent
  • Posterior ulnar recurrent
  • Common interosseous
157
Q

The anterior ulnar recurrent artery arises just inferior to the elbow and ascends to anastomose with the ___

A

The anterior ulnar recurrent artery arises just inferior to the elbow and ascends to anastomose with the inferior ulnar collateral artery

158
Q

The posterior ulnar recurrent artery arises just distal to the anterior ulnar recurrent and ascends posteriorly to anastomose with the ____

A

The posterior ulnar recurrent artery arises just distal to the anterior ulnar recurrent and ascends posteriorly to anastomose with the superior ulnar collateral artery

159
Q

The common interosseous divides into ___ and ___ interosseous arteries

A

The common interosseous divides into anterior and posterior interosseous arteries

160
Q

The anterior interosseous artery runs deep on the anterior surface of the interosseous membrane supplying structures of the ___

A

The anterior interosseous artery runs deep on the anterior surface of the interosseous membrane supplying structures of the deep forearm

161
Q

The posterior interosseous artery passes posterior to the interosseous membrane and supplies structures in the ___

A

The posterior interosseous artery passes posterior to the interosseous membrane and supplies structures in the posterior compartment of the forearm

162
Q

What is the origin of the Extensor carpi ulnaris?

A

Lateral epicondyle

163
Q

What is the insertion of the Extensor carpi ulnaris?

A

Base of the 5th metacarpal

164
Q

What is the innervation of the Extensor carpi ulnaris?

A

– Posterior Interosseous nerve

165
Q

What is the action of the Extensor carpi ulnaris?

A

Extends and ulnar deviates the wrist

166
Q

What is the origin of the Extensor carpi radialis brevis?

A

Lateral epicondyle

167
Q

What is the insertion of the Extensor carpi radialis brevis?

A

Base of the 3rd metacarpal

168
Q

What is the innervation of the Extensor carpi radialis brevis?

A

Deep radial nerve

169
Q

What is the action of the Extensor carpi radialis brevis?

A

Extends and radial deviates hand

170
Q

What is the origin of the Extensor carpi radialis longus?

A

Lateral supracondylar ridge

171
Q

What is the insertion of the Extensor carpi radialis longus?

A

– Base of the 2nd metacarpal

172
Q

What is the innervation of the Extensor carpi radialis longus?

A

Radial nerve

173
Q

What is the action of the Extensor carpi radialis longus?

A

Extends and radial deviates hand

174
Q

What is the origin of the Extensor digitorum?

A

Lateral epicondyle of the humerus

175
Q

What is the insertion of the Extensor digitorum?

A

Extensor expansions

176
Q

What is the innervation of the Extensor digitorum?

A

Posterior Interosseous nerve

177
Q

What is the action of the Extensor digitorum?

A

Extend fingers digits 2 through 5

178
Q

What is the origin of the Extensor digiti minimi?

A

Ulnar side extensor digitorum

179
Q

What is the insertion of the Extensor digiti minimi?

A

Extensor expansion of digit 5

180
Q

What is the innervation of the Extensor digiti minimi?

A

Posterior Interosseous nerve

181
Q

What is the action of the Extensor digiti minimi?

A

Extends the 5th digit

182
Q

What does the deep branch of the radial nerve changes its name to, once it comes out of the supinator muscle?

A

Posterior Interosseous nerve

183
Q

How does the supinator supinate the forearm?

A

It contracts along with the biceps. They function together to supinate

184
Q

What bone movement is occurring during supination of the forearm?

A

The radius rotates around the ulnar

185
Q

How does the forearm pronate?

A

Pronator teres and quadratus function together to pronate

186
Q

Flexor digitorum profundus passes through the tunnels created by ___

A

Flexor digitorum profundus passes through the tunnels created by flexor digitorum superficialis

187
Q

What branch of the median nerve innervates the median part of the flexor digitorum profundus?

A

Anterior interosseous nerve

188
Q

___ is the terminal branch of the median nerve

A

Anterior interosseous nerve is the terminal branch of the median nerve

189
Q

What are the superficial muscles of the flexor compartment of the forearm?

A
  • Brachioradialis
  • Pronator teres
  • Flexor carpi radialis
  • Palmaris longus
  • Flexor carpi ulnaris
190
Q

What are the intermediate muscles of the flexor compartment of the forearm?

A

Flexor digitorum superficialis

191
Q

What are the deep muscles of the flexor compartment of the forearm?

A
  • Flexor pollicis longus

- Flexor digitorum profundus

192
Q

What are the deepest muscles of the flexor compartment of the forearm?

A

Pronator Quadratus

193
Q

What is the anterior boundary of the anatomical snuffbox?

A

Tendons of the abductor pollicis longus and extensor pollicis brevis

194
Q

What is the posterior boundary of the anatomical snuffbox?

A

Tendon of the extensor pollicis longus

195
Q

What is the content of the anatomical snuffbox?

A

Radial artery

196
Q

What is the origin of the Abductor pollicis longus?

A

– Posterior surface of the middle ulna, radius and interosseous membrane

197
Q

What is the insertion of the Abductor pollicis longus?

A

Base of the 1st metacarpal

198
Q

What is the innervation of the Abductor pollicis longus?

A

Posterior Interosseous nerve

199
Q

What is the action of the Abductor pollicis longus?

A

Abducts thumb

200
Q

What is the origin of the Extensor pollicis brevis?

A

Middle one third posterior surface or radius and interosseous membrane

201
Q

What is the insertion of the Extensor pollicis brevis?

A

Base of the proximal phalanx of the thumb

202
Q

What is the innervation of the Extensor pollicis brevis?

A

– Posterior Interosseous nerve

203
Q

What is the action of the Extensor pollicis brevis?

A

Extends thumb

204
Q

What is the origin of the Extensor pollicis longus?

A

Middle one third of the posterior surface of the ulna and interosseous membrane

205
Q

What is the insertion of the Extensor pollicis longus?

A

Base of the distal phalanx of the thumb

206
Q

What is the innervation of the Extensor pollicis longus?

A

– Posterior interosseous nerve

207
Q

What is the action of the Extensor pollicis longus?

A

Extends the thumb

208
Q

What is the origin of the Extensor indicis?

A

– Posterior surface of the ulna and interosseous membrane

209
Q

What is the insertion of the Extensor indicis?

A

Extensor digitorum tendon to index finger

210
Q

What is the innervation of the Extensor indicis?

A

Posterior interosseous nerve

211
Q

What is the action of the Extensor indicis?

A

Extends the index finger

212
Q

The radial nerve enters the forearm by crossing anteriorly to the lateral epicondyle between the ___ and ___ muscles. At this point the nerve divides into the superficial and deep branches

A

The radial nerve enters the forearm by crossing anteriorly to the lateral epicondyle between the Brachialis and the Brachioradialis muscles. At this point the nerve divides into the superficial and deep branches

213
Q

____ continues from its division with the deep to travel underneath the Brachioradialis muscle and then emerges superficial near the distal end of the forearm. It then provides innervation to the skin and joints of the hand.

A

Superficial branch of the radial nerve continues from its division with the deep to travel underneath the Brachioradialis muscle and then emerges superficial near the distal end of the forearm. It then provides innervation to the skin and joints of the hand.

214
Q

___ is the cutaneous and articular innervation of the dorsum of the hand

A

Superficial branch of the radial nerve is the cutaneous and articular innervation of the dorsum of the hand

215
Q

___ artery supplies the posterior aspect of the forearm and is a branch of the common interosseous

A

Posterior interosseous artery supplies the posterior aspect of the forearm and is a branch of the common interosseous

216
Q

What are the superficial muscles of the externsor compartment of the forearm?

A
  • Extensor carpi ulnaris
  • Extensor Carpi Radialis Brevis
  • Extensor Carpi Radialis Longus
  • Extensor Digitorum Communis
  • Extensor Digiti Minimi
217
Q

What are the deep muscles of the extensor compartment of the forearm?

A
  • Abductor Pollicis Longus
  • Extensor Pollicis Brevis
  • Extensor Pollicis Longus
  • Extensor Indicis
218
Q

What does the dorsal tubercle of the radius/ lister’s tubercle do?

A

It creates a trochlear for the extensor pollicis longus, so that it doesn’t slip of place when the thumb is moved up

219
Q

What does the radial artery do after going through the anatomical snuff box and before going through the 1st dorsal interosseous?

A

It sends off princeps pollicis artery and radialis indicis artery

220
Q

The tendons of the superficial extensor muscles passes underneath the ___

A

The tendons of the superficial extensor muscles passes underneath the Abductor pollicis longus and extensor pollicis brevis at the de quervain

221
Q

What are vincula?

A

Ligamentous attachments that come from the ulnar aspect of the digits into the long tendons of the finger

222
Q

What happens if there is an injury to the volar plate of the finger?

A

The finger will not bend and there won’t be proper function of the fingers

223
Q

What muscles are included in the wad of 3?

A
  • Extensor carpi ulnaris
  • Extensor Carpi Radialis Brevis
  • Extensor Carpi Radialis Longus
224
Q

What are the intrinsic muscles on the dorsum of the hand?

A

There are none

225
Q

What are the de quervain muscles and their tendons are called de quervain’s tendons?

A
  • Abductor Pollicis Longus

- Extensor Pollicis Brevis

226
Q

What do the de quervain’s muscle and tendon have their names?

A

Because they overlap and their tendons run over Extensor Carpi Radialis Brevis, and Extensor Carpi Radialis Longus

Anatomy 2 (9 decks)

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