Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CBS602 UL II: Forearm, Wrist and Hand > Muscles of the Forearm, Wrist & Hand > Flashcards

Muscles of the Forearm, Wrist & Hand Flashcards

1
Q

What type of joint is the wrist joint?

A

The radiocarpal joint is a condyloid synovial joint.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What movements occur at the wrist joint?

A

The wrist joint allows for the following movements:

Flexion
Extension
Abduction (Radial deviation)
Adduction (Ulnar deviation)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What type of movements are possible at the MCP joints of the fingers?

A

The metacarpophalangeal (MCP) joints allow for:

Flexion
Extension
Abduction (moving fingers apart)
Adduction (bringing fingers together)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What movements occur at the PIP and DIP joints?

A

The proximal interphalangeal (PIP) and distal interphalangeal (DIP) joints allow for:

Flexion
Extension

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What type of joint is the thumb’s carpometacarpal (CMC) joint?

A

The CMC joint of the thumb is a saddle joint.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the unique movements of the thumb?

A

The thumb can perform:

Flexion (bringing the thumb across the palm)
Extension (moving the thumb away from the palm)
Abduction (lifting the thumb away from the palm)
Adduction (bringing the thumb back towards the palm)
Opposition (bringing the thumb to touch the fingers)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What muscles are in the superficial layer of the anterior compartment of the forearm?

A

Pronator Teres
Flexor Carpi Radialis
Palmaris Longus
Flexor Carpi Ulnaris

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the action of Pronator Teres?

A

Pronator Teres pronates the forearm and assists in flexion of the elbow joint.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Which muscle is in the intermediate layer of the anterior compartment?

A

The Flexor Digitorum Superficialis.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the function of Flexor Digitorum Superficialis?

A

It flexes the proximal interphalangeal (PIP) and metacarpophalangeal (MCP) joints of the fingers.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Which muscles are in the deep layer of the anterior compartment?

A

Flexor Digitorum Profundus
Flexor Pollicis Longus
Pronator Quadratus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the primary action of Flexor Digitorum Profundus?

A

Flexor Digitorum Profundus flexes the distal interphalangeal (DIP) joints of the fingers.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What muscles are in the superficial layer of the posterior compartment?

A

The muscles in the superficial layer are:

Brachioradialis
Extensor Carpi Radialis Longus
Extensor Carpi Radialis Brevis
Extensor Digitorum
Extensor Digiti Minimi
Extensor Carpi Ulnaris

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which muscle in the posterior compartment of the forearm acts as a flexor of the elbow joint?

A

The Brachioradialis acts as a flexor of the elbow joint.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What muscles are in the deep layer of the posterior compartment of the forearm?

A

The muscles in the deep layer are:

Supinator
Extensor Indicis
Abductor Pollicis Longus
Extensor Pollicis Brevis
Extensor Pollicis Longus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the action of Abductor Pollicis Longus?

A

Abductor Pollicis Longus abducts and extends the thumb at the carpometacarpal (CMC) joint.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Where do the muscles of the superficial layer of the anterior (flexor) compartment of the forearm originate?

A

They originate from the common flexor tendon attached to the medial epicondyle of the humerus.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What muscles originate from the common flexor tendon?

A

What muscles originate from the common flexor tendon?

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Where do the muscles of the superficial layer of the posterior (extensor) compartment of the forearm originate?

A

A: They originate from the common extensor tendon attached to the lateral epicondyle of the humerus.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What muscles originate from the common extensor tendon?

A

The muscles that originate from the common extensor tendon are:

Extensor Carpi Radialis Brevis
Extensor Digitorum
Extensor Digiti Minimi
Extensor Carpi Ulnaris

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Which tendon is most associated with tennis elbow (lateral epicondylitis)?

A

The common extensor tendon is most associated with tennis elbow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Which tendon is most associated with golfer’s elbow (medial epicondylitis)?

A

The common flexor tendon is most associated with golfer’s elbow.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is the origin of the humeral head of the pronator teres?

A

Common flexor tendon (medial epicondyle)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What is the origin of the ulnar head of the pronator teres?

A

Coronoid process of the ulna

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Where does the pronator teres insert?

A

Lateral mid-shaft of the radius

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

What is the primary action of the pronator teres?

A

Pronation of the forearm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Which nerve innervates the pronator teres?

A

Median nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

What is the origin of the flexor carpi radialis?

A

Common flexor tendon (medial epicondyle)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Where does the flexor carpi radialis insert?

A

Base of the 2nd and 3rd metacarpals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

What actions does the flexor carpi radialis perform?

A

Wrist flexion and radial deviation (abduction)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

Which nerve innervates the flexor carpi radialis?

A

A: Median nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

Which muscle group does the pronator teres belong to?

A

Anterior compartment of the forearm (superficial layer)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

How does the action of flexor carpi radialis differ from that of pronator teres?

A

Flexor carpi radialis primarily flexes the wrist and aids in radial deviation, while pronator teres primarily pronates the forearm.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

What is the origin of the flexor carpi ulnaris?

A

Common flexor tendon (medial epicondyle)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

Where does the flexor carpi ulnaris insert?

A

Pisiform, hook of hamate, and 5th metacarpal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

What actions does the flexor carpi ulnaris perform?

A

Wrist flexion and ulnar deviation (adduction)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

Which nerve innervates the flexor carpi ulnaris?

A

Ulnar nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

What is the origin of the palmaris longus?

A

Common flexor tendon (medial epicondyle)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

Where does the palmaris longus insert?

A

Palmar aponeurosis of the hand

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

What are the actions of the palmaris longus?

A

Flexes the wrist and tenses the palmar aponeurosis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

Which nerve innervates the palmaris longus?

A

Median nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

Which muscle group do flexor carpi ulnaris and palmaris longus belong to?

A

Anterior compartment of the forearm (superficial layer)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

How does the action of the flexor carpi ulnaris differ from that of the palmaris longus?

A

Flexor carpi ulnaris primarily functions in wrist flexion and ulnar deviation, while palmaris longus primarily flexes the wrist and tenses the palmar aponeurosis.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

What is the origin of the flexor digitorum superficialis?

A

Humero-ulnar head: Common flexor tendon (medial epicondyle) and coronoid process
Radial head: Oblique line of radius (anterior proximal half)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

Where does the flexor digitorum superficialis insert?

A

A: Middle phalanx of the medial 4 digits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

What actions does the flexor digitorum superficialis perform?

A

Wrist flexion
Flexion of PIP joints of the medial 4 digits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

Which nerve innervates the flexor digitorum superficialis?

A

Median nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

To which muscle group does the flexor digitorum superficialis belong?

A

Anterior compartment of the forearm (intermediate layer)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

How does the action of the flexor digitorum superficialis relate to finger movement?

A

It flexes the proximal interphalangeal (PIP) joints, allowing for flexion of the fingers.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

What is the origin of the flexor pollicis longus?

A

Anterior radius and interosseous membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

Where does the flexor pollicis longus insert?

A

Base of the distal phalanx of the thumb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
52
Q

What actions does the flexor pollicis longus perform?

A

Flexion of the MCP and IP joints of the thumb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
53
Q

Which nerve innervates the flexor pollicis longus?

A

Median nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
54
Q

What is the origin of the flexor digitorum profundus?

A

Proximal ¾ of the medial and anterior surfaces of the ulna and interosseous membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
55
Q

Where does the flexor digitorum profundus insert?

A

Base of the distal phalanx of the medial 4 digits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
56
Q

What actions does the flexor digitorum profundus perform?

A

Wrist flexion
Flexion of DIP joints of the medial 4 digits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
57
Q

Which nerves innervate the flexor digitorum profundus?

A

Ulnar nerve (medial half)
Median nerve (lateral half)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
58
Q

o which muscle group do the flexor pollicis longus and flexor digitorum profundus belong?

A

Anterior compartment of the forearm (deep layer)

59
Q

What is the origin of the pronator quadratus?

A

Distal anterior ulna

60
Q

Where does the pronator quadratus insert?

A

Distal anterior radius

61
Q

What action does the pronator quadratus perform?

A

A: Pronation

62
Q

Which nerve innervates the pronator quadratus?

A

Median nerve

63
Q

What is the origin of the pronator teres?

A

Humeral head: Common flexor tendon (medial epicondyle)
Ulnar head: Coronoid process of ulna

64
Q

Where does the pronator teres insert?

A

Lateral mid-shaft of radius

65
Q

What action does the pronator teres perform?

A

Pronation of the forearm

66
Q

Which nerve innervates the pronator teres?

A

Median nerve

67
Q

What is the origin of the supinator?

A

Lateral epicondyle of humerus and supinator fossa of ulna

68
Q

Where does the supinator insert?

A

Lateral surface of the proximal radius

69
Q

What action does the supinator perform?

A

A: Supination of the forearm

70
Q

Which nerve innervates the supinator?

A

Radial nerve

71
Q

What is the origin of the brachioradialis?

A

Lateral supracondylar ridge of the humerus

72
Q

Where does the brachioradialis insert?

A

Lateral distal radius

73
Q

What action does the brachioradialis perform?

A

Flexion of the elbow in mid-pronation

74
Q

Which nerve innervates the brachioradialis?

A

Radial nerve

75
Q

What is the origin of the extensor carpi radialis longus?

A

Lateral supracondylar ridge of the humerus (distal to brachioradialis)

76
Q

Where does the extensor carpi radialis longus insert?

A

Base of the 2nd metacarpal

77
Q

What actions does the extensor carpi radialis longus perform?

A

Wrist extension and radial deviation (abduction)

78
Q

Which nerve innervates the extensor carpi radialis longus?

A

Radial nerve

79
Q

What is the origin of the extensor carpi radialis brevis?

A

Common extensor tendon (lateral epicondyle)

80
Q

Where does the extensor carpi radialis brevis insert?

A

Base of the 3rd metacarpal

81
Q

What actions does the extensor carpi radialis brevis perform?

A

Wrist extension and radial deviation (abduction)

82
Q

Which nerve innervates the extensor carpi radialis brevis?

A

Radial nerve

83
Q

What is the origin of the extensor digitorum?

A

A: Common extensor tendon (lateral epicondyle)

84
Q

Where does the extensor digitorum insert?

A

Base of the middle and distal phalanges of the medial 4 digits via the extensor expansion

85
Q

What actions does the extensor digitorum perform?

A

Extension of wrist, MCP, PIP, and DIP joints of the medial 4 digits

86
Q

Which nerve innervates the extensor digitorum?

A

Radial nerve

87
Q

What is the origin of the supinator?

A

Lateral epicondyle, radial collateral and annular ligaments, and supinator crest of ulna

88
Q

Where does the supinator insert?

A

Lateral proximal 1/3 of radius

89
Q

What action does the supinator perform?

A

Supination

90
Q

Which nerve innervates the supinator?

A

Radial nerve

91
Q

What is the origin of the extensor indicis?

A

Posterior distal 1/3 of ulna and interosseous membrane

92
Q

Where does the extensor indicis insert?

A

Extensor expansion of the 2nd digit

93
Q

What actions does the extensor indicis perform?

A

Extension of the wrist and index finger

94
Q

Which nerve innervates the extensor indicis?

A

Radial nerve

95
Q

What is the origin of the abductor pollicis longus?

A

Middle 1/3 of radius, ulna, and interosseous membrane

96
Q

Where does the abductor pollicis longus insert?

A

Base of the 1st metacarpal

97
Q

What actions does the abductor pollicis longus perform?

A

Abducts the thumb and extends the wrist and CMC joint

98
Q

Which nerve innervates the abductor pollicis longus?

A

Radial nerve

99
Q

What is the origin of the extensor pollicis brevis?

A

Posterior radius and interosseous membrane

100
Q

Where does the extensor pollicis brevis insert?

A

Base of the proximal phalanx of the thumb

101
Q

What actions does the extensor pollicis brevis perform?

A

Extends the proximal phalanx of the thumb at the 1st MCP joint, and extends the wrist and CMC joint

102
Q

Which nerve innervates the extensor pollicis brevis?

A

Radial nerve

103
Q

What is the origin of the extensor pollicis longus?

A

Posterior ulna and interosseous membrane

104
Q

Where does the extensor pollicis longus insert?

A

Base of the distal phalanx of the thumb

105
Q

What actions does the extensor pollicis longus perform?

A

Extends the distal phalanx of the thumb at the 1st IP joint. It also extends the wrist, CMC, and MCP joints

106
Q

Which nerve innervates the extensor pollicis longus?

A

Radial nerve

107
Q

What muscles form the thenar group in the hand?

A

Abductor pollicis brevis, flexor pollicis brevis, opponens pollicis

108
Q

What muscles are part of the hypothenar group in the hand?

A

Abductor digiti minimi, flexor digiti minimi brevis, opponens digiti minimi

109
Q

Which muscle is responsible for adducting the thumb in the hand?

A

Adductor pollicis

110
Q

What structures are found in the central compartment of the hand?

A

A: Long flexor tendons, lumbrical muscles

111
Q

What muscles belong to the interosseous group in the hand?

A

Dorsal and palmar interossei

112
Q

What are the muscles in the thenar group of the hand?

A

Abductor pollicis brevis, flexor pollicis brevis, opponens pollicis

113
Q

What is the insertion point of the abductor pollicis brevis?

A

Base of proximal phalanx of the thumb

114
Q

What action is performed by the abductor pollicis brevis?

A

Abduction of the thumb

115
Q

Where does the flexor pollicis brevis insert?

A

Base of proximal phalanx of the thumb

116
Q

What action does the flexor pollicis brevis perform?

A

Flexion of the Thumb

117
Q

What is the insertion point of the opponens pollicis?

A

1st metacarpal

118
Q

What action is performed by the opponens pollicis?

A

Opposition of the thumb

119
Q

What nerve innervates the thenar group muscles?

A

Recurrent branch of the median nerve

120
Q

What are the muscles in the hypothenar group of the hand?

A

Abductor digiti minimi, flexor digiti minimi brevis, opponens digiti minimi

121
Q

Where does the abductor digiti minimi insert?

A

Base of proximal phalanx of the 5th digit

122
Q

What is the primary action of the abductor digiti minimi?

A

Abduction of the 5th digit

123
Q

What is the insertion point of the flexor digiti minimi?

A

Base of proximal phalanx of the 5th digit

124
Q

What action does the flexor digiti minimi perform?

A

Flexion of the 5th digit

125
Q

Where does the opponens digiti minimi insert?

A

5th metacarpal

126
Q

What action is performed by the opponens digiti minimi?

A

Opposition of the 5th digit

127
Q

What nerve innervates the hypothenar group muscles?

A

Deep branch of the ulnar nerve

128
Q

What muscle makes up the adductor group in the hand?

A

Adductor pollicis

129
Q

What are the two heads of the adductor pollicis?

A

Transverse head and oblique head

130
Q

Where does the adductor pollicis insert?

A

Base of proximal phalanx of the thumb

131
Q

What is the primary action of the adductor pollicis?

A

Adduction of the thumb

132
Q

What nerve innervates the adductor pollicis?

A

Deep branch of the ulnar nerve

133
Q

What muscles make up the central group of the hand?

A

Lumbricals

134
Q

Where do the lumbricals originate?

A

Flexor digitorum profundus tendons

135
Q

Where do the lumbricals insert?

A

Extensor expansion

136
Q

What is the action of the lumbricals?

A

Flexion of MCP joints and extension of IP joints

137
Q

What muscles make up the interossei group?

A

Palmar interossei and dorsal interossei

138
Q

What is the origin of the interossei muscles?

A

In-between metacarpals

139
Q

Where do the interossei muscles insert?

A

Base of proximal phalanx and extensor expansion

140
Q

What is the action of the palmar interossei?

A

Palmar interossei adduct the fingers (PAD)

141
Q

What is the action of the dorsal interossei?

A

Dorsal interossei abduct the fingers (DAB)

142
Q

What nerve innervates the interossei muscles?

A

Deep palmar branch of the ulnar nerve

143
Q

What additional action do the interossei muscles assist with?

A

Assist lumbricals in flexion of MCP joints and extension of IP joints

144
Q
A

CBS602 UL II: Forearm, Wrist and Hand (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions