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HSC1007 > Upper limb Week 9 > Flashcards

Upper limb Week 9 Flashcards

1
Q

When looking at the cross section of the arm, what makes the anterior compartment

A

Biceps brachii
Brachialis
Coracobrachialis

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2
Q

When looking at the cross section of the arm, what makes the posterior compartment

A

Triceps brachii
Anconeus

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3
Q

What is the origin of biceps brachii

A

Long head - Supraglenoid tubercle of scapula;
Short head - Apex of coracoid process

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4
Q

What is the insertion of biceps brachii

A

Radial tuberosity of radius

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5
Q

What innervates biceps brachii

A

musculocutaneous nerve

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6
Q

What is the action of biceps brachii

A

Flexion of the forearm at the elbow joint
Supinates forearm
Accessory flexor of the arm at shoulder joint

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7
Q

What is the origin of brachialis

A

Anterior aspect of humerus

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8
Q

What is the insertion of brachialis

A

Ulna tuberosity

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9
Q

What innervates brachialis

A

Musculocutaneous nerve

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10
Q

What is the action of brachialis

A

Flexor of the forearm at the elbow joint

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11
Q

What is the origin of coracobrachialis

A

coracoid process of scapula

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12
Q

What is the insertion of coracobrachialis

A

mid-shaft of humerus

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13
Q

What innervates coracobrachialis

A

Musculocutaneous nerve

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14
Q

What is the action of coracobrachialis

A

Flexor of the arm at the shoulder joint

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15
Q

What are the anterior compartment of the upper arm involved in

A

Flexion at the shoulder joint

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16
Q

Which branch is the musculocutaneous nerve from

A

Branch of lateral cord of brachial plexus

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17
Q

Which muscles does the musculocutaneous nerve pierce through

A

coracobrachialis muscle

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18
Q

What does the musculocutaneous nerve innervate

A

Biceps brachii
Brachialis
Coracobrachialis

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19
Q

What is the origin of triceps brachii

A

Long head- Infraglenoid tubercle of scapula
Medial head-posterior surface of humerus
lateral head-posterior surface of humerus

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20
Q

What is the insertion of triceps brachii

A

Olecranon process of ulna

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21
Q

What innervates triceps brachii

A

Radial nerve

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22
Q

What is the action of triceps brachii

A

Extension of the forearm at the elbow joint.
Long head - extend and adduct the arm at the
shoulder joint

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23
Q

Which branch is the radial nerve from

A

Branch of posterior cord of brachial plexus

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24
Q

What does the radial nerve innervate

A

Supplies muscles of back of arm and forearm

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25
Q

Which fingers does the medial nerve innervate

A

thumb, index, middle and 1/2 ring fingers

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26
Q

Which fingers does the radial nerve innervate

A

1/2 ring finger and pinky

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27
Q

When does the subclavian artery become an axillary artery

A

outer border of the first rib

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28
Q

What is the axillary artery

A

A continuation of subclavian artery

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29
Q

How many parts and where does the axillary artery divide

A

Breaks into 3 parts at pectoralis minor

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30
Q

When does the axillary artery become a brachial artery

A

lower border of teres major

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31
Q

How many parts and where does the brachial artery divide

A

breaks into 2 parts (radial and ulnar arteries) below elbow joint

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32
Q

Where can the cubital fossa be found

A

Anterior aspect of elbow joint

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33
Q

What are the 3 boundaries of the cubital fossa

A

Superiorly, Medially, Laterally

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34
Q

What makes the superior border of the cubital fossa

A

an imaginary line connecting the medial and lateral epicondyles

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35
Q

What makes the medial border of the cubital fossa

A

pronator teres & the mass of flexor muscles of the forearm

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36
Q

What makes the lateral border of the cubital fossa

A

brachioradialis ,mass of extensor muscles

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37
Q

What are the contents found at the cubital fossa

A

tendon of the biceps brachii muscle
brachial artery
median nerve

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38
Q

What are the superficial muscles of the forearm

A

Pronator teres
Flexor carpi radialis
Palmaris longus
Flexor carpi ulnaris
(Intermediate layer)
Flexor digitorum superficialis

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39
Q

What are the deep muscles of the forearm

A

Pronator quadratus
Flexor pollicis longus
Flexor digitorum profundus

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40
Q

Placing your left hand over your right, with your thumb on your medial epicondyle, what are the muscles from index to pinky

A

Index - pronator teres
Middle - flexi carpi radialis
Ring - palmaris longus
Pinky - flexi carpi ulnaris

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41
Q

Where can the pronator quadratus be found

A

From ulna head towards median

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42
Q

Where can flexor digitorum profundus be found

A

on top of pronator quadratus and flexor pollicis longus

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43
Q

What is the origin of pronator teres

A

Medial epicondyle of humerus
Coronoid process of ulna

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44
Q

What is the insertion of pronator teres

A

mid-shaft of radius

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45
Q

What innervates pronator teres

A

median nerve

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46
Q

What is the action of pronator teres

A

Pronates and flexes forearm

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47
Q

What is the origin of flexor carpi radialis

A

medial epicondyle of humerus

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48
Q

What is the insertion of flexor carpi radialis

A

Base of metacarpals II and III

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49
Q

What innervates flexor carpi radialis

A

median nerve

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50
Q

What is the action flexor carpi radialis

A

Flexion and abduction of wrist

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51
Q

What is the origin of palmaris longus

A

Medial epicondyle of humerus

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52
Q

What is the insertion of palmaris longus

A

Palmar aponeurosis of hand

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53
Q

What innervates palmaris longus

A

median nerve

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54
Q

What is the action of palmaris longus

A

Flexion of wrist joint

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55
Q

What is the origin of flexor carpi ulnaris

A

medial epicondyle of humerus, olecranon and posterior border of ulna

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56
Q

What is the insertion of flexor carpi ulnaris

A

Pisiform bone, hamate and base of metacarpal
V

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57
Q

What innervates flexor carpi ulnaris

A

ulnar nerve

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58
Q

What is the action of flexor carpi ulnaris

A

Flexion and adduction of wrist

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59
Q

What is the origin of flexor digitorum superficialis

A

Medial epicondyle of humerus
coronoid process of ulna
head of radius

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60
Q

What is the insertion of flexor digitorum superficialis

A

Splits into four tendons, which attach to the palmar surfaces of the middle phalanges of the index, middle, ring, and little fingers

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61
Q

What innervates flexor digitorum superficialis

A

median nerv

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62
Q

What is the action of flexor digitorum superficialis

A

Flexes wrist joint, proximal interphalangeal joints, metacarpophalangeal joints of the index, middle, ring, and little fingers

63
Q

What is the origin of flexor digitorum profundus

A

Ulna and interosseous membrane

64
Q

What is the insertion of flexor digitorum profundus

A

Four tendons, which attach to the palmar surfaces of the distal phalanges of the index, middle, ring, and little fingers

65
Q

What innervates flexor digitorum profundus

A

Lateral half by median nerve
Medial half by ulnar nerve

66
Q

What is the action of flexor digitorum profundus

A

Flexes wrist joint, distal interphalangeal joints, metacarpophalangeal joints of the index, middle, ring, and little fingers

67
Q

What is the origin of flexor pollicis longus

A

Anterior surfaces of radius and interosseous
membrane

68
Q

What is the insertion of flexor pollicis longus

A

base of distal phalanx of thumb

69
Q

What innervates flexor pollicis longus

A

median nerve

70
Q

What is the action of flexor pollicis longus

A

Flexes interphalangeal and metacarpo-
phalangeal joint of the thumb

71
Q

What is the origin of pronator quadratus

A

Distal anterior surface of ulna

72
Q

What is the insertion of pronator quadratus

A

Distal anterior surface of radius

73
Q

What innervates pronator quadratus

A

median nerve

74
Q

What is the action of pronator quadratus

A

pronation

75
Q

What innervates the posterior compartment of the forearm muscles

A

Radial nerve

76
Q

What is the origin of brachioradialis

A

supracondylar ridge of humerus

77
Q

What is the insertion of brachioradialis

A

Distal end of radius

78
Q

What innervates brachioradialis

A

radial nerve

79
Q

What is the action of brachioradialis

A

flexor of elbow joint

80
Q

What is the origin of Extensor carpi radialis longus

A

supracondylar ridge of humerus

81
Q

What is the insertion of Extensor carpi radialis longus

A

Dorsal surface of base of metacarpal II

82
Q

What is the action of Extensor carpi radialis longus

A

Extends and abducts the wrist

83
Q

What is the origin of Extensor carpi radialis brevis

A

Lateral epicondyle of humerus

84
Q

What is the insertion of Extensor carpi radialis brevis

A

Dorsal surface of base of
metacarpals II and III

85
Q

What is the action of Extensor carpi radialis brevis

A

Extends and abducts the wrist

86
Q

What is the origin of Extensor digitorum

A

Lateral epicondyle of humerus

87
Q

What is the insertion of Extensor digitorum

A

bases of the middle and distal phalanges of the
index, middle, ring, and little fingers

88
Q

What is the action of Extensor digitorum

A

Extends the index, middle, ring, and little fingers

Can also extend the wrist

89
Q

What is the origin of Extensor digiti minimi

A

Lateral epicondyle of humerus

90
Q

What is the insertion of Extensor digiti minimi

A

Dorsal hood of the little finger

91
Q

What is the action of Extensor digiti minimi

A

Extends the little finger

92
Q

What is the origin of Extensor carpi ulnaris

A

Lateral epicondyle of humerus and ulna

93
Q

What is the insertion of Extensor carpi ulnaris

A

base of metacarpal V

94
Q

What is the action of Extensor carpi ulnaris

A

Extends and adducts the wrist

95
Q

What is the wrist joint

A

synovial joint

96
Q

Where are the articular surfaces of wrist joint

A

Distal end of radius & scaphoid, lunate,
triquetral

97
Q

What are the ligaments of the wrist joint

A

Fibrous capsule with synovial membrane
Dorsal & palmar radio-carpal ligaments
Radial & ulnar collateral ligaments

98
Q

What are the movements of the wrist joint

A

adduction - abduction
flexion - extension

99
Q

What fingers does the ulnar artery supply

A

1/2 index to pinky

100
Q

What fingers does the radial artery supply

A

thumb to 1/2 index

101
Q

How does the Interossei help the lumbricals

A

Interossei help the lumbricals to extend IP joints and flex MC-P joints

102
Q

What is the interossei involve in adduction

A

palmar interossei

103
Q

what is the interossei involved in abduction

A

dorsal interossei

104
Q

What is the origin of supinator

A

Superficial part-lateral epicondyle of humerus,
ulna

105
Q

What is the insertion of supinator

A

Lateral surface of radius

106
Q

What is the action of supinator

A

supination

107
Q

What is the origin of Extensor indicis

A

ulna

108
Q

What is the insertion of Extensor indicis

A

Extensor hood of index finger

109
Q

What is the action of Extensor indicis

A

extends index finger

110
Q

What is the origin of Abductor pollicis
longus

A

Posterior surfaces of ulna and radius

111
Q

What is the insertion of Abductor pollicis
longus

A

Lateral side of base of metacarpal I

112
Q

What is the action of Abductor pollicis
longus

A

Abducts carpometacarpal joint of thumb

113
Q

What is the origin of Extensor pollicis brevis

A

Posterior surface of radius

114
Q

What is the insertion of Extensor pollicis brevis

A

base of proximal phalanx of the thumb

115
Q

What is the action of Extensor pollicis brevis

A

Extends metacarpophalangeal and
carpometacarpal joint of the thumb

116
Q

What is the origin of Extensor pollicis longus

A

Posterior surface of ulna

117
Q

What is the insertion of Extensor pollicis longus

A

Dorsal surface of base of distal phalanx of thumb

118
Q

What is the action of Extensor pollicis longus

A

Extends carpometacarpal and metacarpophalangeal, interphalangeal
joint of the thumb

119
Q

What are the thenar muscles

A

opponens pollicis, Abductor pollicis
brevis, flexor pollicis brevis

120
Q

What innervates the thenar muscles

A

median nerve

121
Q

What is the origin of opponens pollicis

A

Tubercle of trapezium and flexor retinaculum

122
Q

What is the insertion of opponens pollicis

A

Lateral margin and adjacent palmar surface of
metacarpal I

123
Q

What innervates opponens pollicis

A

median nerve

124
Q

What is the action of opponens pollicis

A

medially rotates thumb

125
Q

What is the origin of abductor pollicis brevis

A

Tubercles of scaphoid and trapezium and
adjacent flexor

126
Q

What is the insertion of abductor pollicis brevis

A

Proximal phalanx and extensor hood of thumb

127
Q

What innervates abductor pollicis brevis

A

median nerve

128
Q

What is the action of abductor pollicis brevis

A

Abducts thumb at metacarpophalangeal joint

129
Q

What is the origin of flexor pollicis brevis

A

Tubercle of the trapezium and flexor retinaculum

130
Q

What is the insertion of flexor pollicis brevis

A

Proximal phalanx
of the thumb

131
Q

What is the action of flexor pollicis brevis

A

flexes the metacarpophalangeal joint of the thumb

132
Q

What innervates flexor pollicis brevis

A

median nerve

133
Q

what are the hypothenar muscles

A

Opponens digiti minimi, abductor digiti
minimi, Flexor digiti minimi brevis

134
Q

what innervates the hypothenar muscles

A

Deep branch of ulnar nerve [C8,T1]

135
Q

What is the origin of Opponens digiti minimi

A

Hook of hamate and flexor retinaculum

136
Q

What is the insertion of Opponens digiti minimi

A

Medial aspect of metacarpal V

137
Q

What innervates Opponens digiti minimi

A

Deep branch of ulnar nerve [C8,T1]

138
Q

What is the action of Opponens digiti minimi

A

Laterally rotates metacarpal V

139
Q

What is the origin of Abductor digiti minimi

A

Pisiform
pisohamate ligament
tendon of flexor carpi ulnaris

140
Q

What is the insertion of Abductor digiti minimi

A

Proximal phalanx of little finger

141
Q

What innervates Abductor digiti minimi

A

Deep branch of ulnar nerve [C8,T1]

142
Q

What is the action of Abductor digiti minimi

A

Abducts little finger at metacarpophalangeal joint

143
Q

What is the origin of Flexor digiti minimi brevis

A

Hook of the hamate and flexor retinaculum

144
Q

What is the insertion of Flexor digiti minimi brevis

A

Proximal phalanx of little finger

145
Q

What is the action of Flexor digiti minimi brevis

A

Flexes little finger at metacarpophalangeal joint

146
Q

What innervates flexor digiti minimi brevis

A

Deep branch of ulnar nerve [C8,T1]

147
Q

What are the extensor muscles innervated by

A

radial nerve

148
Q

What does radial nerve innervate

A

Brachioradialis
Extensor muscles
Anconeus
Supinator
Abductor pollicis longus

149
Q

How to differentiate between acromial and sternal end of clavicle

A

Acromial end is flattened and articulates with acromion process of scapula

Sternal end if enlarged and articulates with manubrium sternum

150
Q

What separates the deep muscles

A

Deep fascia

151
Q

Is the long head of triceps brachii found superficially or deep

A

Superficially

152
Q

What does a damage in radial nerve lead to

A

wrist drop as muscles cannot be extended

153
Q

What is the clinical significance of cubital fossa

A

Test for deep tendon reflex

Measure BP

Draw blood

154
Q

How many pronators can be found in the anterior aspect

A

2 (1 superficial, 1 deep)

HSC1007 (18 decks)

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