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MSK test 2 > MSK 8 > Flashcards

MSK 8 Flashcards

(113 cards)

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1
Q

all posterior forearm compartment muscles are innervated by what?

A

radial nerve

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2
Q

what is the origin of the brachioradialis?

A

proximal 2/3 of lateral supracondylar ridge of huemrus

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3
Q

what is the insertion of the brachioradialis?

A

lateral surface of distal end of radius proximal to styloid process

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4
Q

what is the function of the brachioradialis?

A

flexion of the forearm

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5
Q

what is the innervation of the brachioradialis?

A

radial nerve

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6
Q

what is the origin of extensor carpi radialis longus?

A

distal 1/3 of lateral supracondylar ridge of humerus

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7
Q

what is the insertion of the extensor carpi radialis longus?

A

base of 2nd metacarpal bone

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8
Q

what are the functions of the extensor carpi radialis longus?

A
  1. extension of hand at wrist
  2. radial deviation (abduction) of wrist
  3. flexion of elbow (weak)
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9
Q

what is the innervation of the extensor carpi radialis longus?

A

radial nerve

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10
Q

what is the origin of the extensor carpi radialis brevis?

A

lateral epicondyle of humerus

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11
Q

what is the insertion of the extensor carpi radialis brevis?

A

base of 3rd metacarpal bone

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12
Q

what are the functions of the extensor carpi radialis brevis?

A
  1. extension of hand at wrist
  2. radial deviation (abduction) of wrist
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13
Q

what is the innervation of the extensor carpi radialis brevis?

A

radial nerve

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14
Q

what does the mobile wad of 3 consist of?

A

brachioradialis, extensor carpi radialis longus, extensor carpi radialis brevis

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15
Q

what is the origin of the extensor digitorum?

A

lateral epicondyle of humerus (via common extensor tendon)

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16
Q

what is the insertion of the extensor digitorum?

A

distal and middle phalanges of fingers #2-5

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17
Q

what are the functions of the extensor digitorum?

A
  1. extension of fingers 2-5
  2. extension of hand at wrist
  3. extension of elbow (weak)
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18
Q

what is the innervation of the extensor digitorum?

A

radial nerve

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19
Q

what is the origin of the extensor digiti minimi

A

lateral epicondyle of humerus (via common extensor tendon)

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20
Q

what is the insertion of the extensor digiti minimi

A

middle and distal phalanges of little finger

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21
Q

what are the functions of the extensor digiti minimi?

A
  1. extension of finger 5 at MCP, PIP, and DIP joints
  2. extension of hand at wrist
  3. extension of elbow (weak)
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22
Q

what is the innervation of the extensor digit minimi?

A

radial nerve

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23
Q

what is the dorsal digital expansion (extensor hood)

A

triangular tendinous aponeurosis that wrap around the metacarpophalangeal joints and extend along the proximal and middle phalanges across 2 interphalangeal joints to attach to the distal phalanx

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24
Q

what is the origin of the extensor carpi ulnaris?

A

lateral epicondyles of humerus (via common extensor tendon) and posterior border of ulna

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25
what is the insertion of the extensor carpi ulnaris?
base of 5th metacarpal bone
26
what are the functions of the extensor carpi ulnaris?
1. extension of hand at wrist 2. ulnar deviation (adduction of the wrist) 3.extension of elbow (weak)
27
what is the innervation of extensor carpi ulnaris?
radial nerve
28
what is the origin of anconeus?
lateral epicondyle of humerus
29
what is the insertion o anconeus?
- olecranon process of ulna - proximal of posterior surface of ulna
30
what is the function of anconeus?
extension of forearm of elbow (weak)
31
what is the innervation of the anconeus?
radial nerve
32
what is the origin of the supinator
1. supinator crest of ulna 2. lateral epicondyle of humerus
33
what is the insertion of the supinator
proximal 1/3 of lateral surface of radius
34
what is the function of supinator?
supination of the forearm
35
what is the innervation of the supinator?
radial nerve
36
what is the origin of the abductor pollicis longus?
the middle of posterior surface of radius, ulna, and interosseous membrane
37
what is the insertion of the abductor pollicis longus
the base of the 1st metacarpal
38
what are the functions of the abductor pollicis longus?
1. abduction of the thumb of carpometacarpal joint 2. extension of thumb at carpometacarpal joint 3. radial deviation of hand at wrist
39
what is the innervation of the abductor pollicis longus?
radial nerve
40
what is the origin of extensor pollicis brevis?
distal 1/3 of posterior surface of radius and interosseous membrane
41
what is the insertion of extensor pollicis brevis?
base of proximal phalanx of thumb
42
what are the functions of the extensor pollicis brevis?
1. extension of thumb at CMC and MCP joint 2. extension of hand at wrist 3. radial deviation (abduction) of hand (weak)
43
what is the innervation of extensor pollicis brevis?
radial nerve
44
what is the origin of extensor pollicis longus?
middle 1/3 of posterior surface of ulna and interosseous membrane
45
what is the insertion of extensor pollicis longus?
base of distal phalanx of thumb
46
what are the functions of extensor pollicis longus?
1. extension of thumb at all joints 2. extension of hand at wrist 3. radial deviation
47
what is the innervation of extensor pollicis longus?
radial nerve
48
what is the origin of extensor indicis?
distal 1/3 of posterior surface of ulna and interosseous membrane
49
what is the insertion of extensor indicis?
dorsal digital expansion of the 2nd finger
50
what are the functions of extensor indicis?
1. extension of digit 2 at MCP and interphalangeal joints 2. extension of hand at wrist
51
what is the innervation of extensor indicis?
radial nerve
52
what are the borders of the anatomical snuff box?
lateral border: abductor pollicis longus and extensor pollicis brevis medial border: extensor pollicis longus
53
what artery passes through the anatomical snuff box?
radial artery
54
what is medial epicondylitis (golf elbow)?
tenderness and pain at the medial epicondyle, made worse by flexing the wrist
55
what is lateral epicondylitis (tennis elbow)
when the common extensor tendon becomes painful and tender and pain at the lateral epicondyle
56
the hand is composed of 3 parts...
- wrist - hand proper - fingers
57
explain palmar aponeurosis
comes from the palmaris longus, fascia on the palm of the hand, and protects the soft tissues underneath
58
what are the 3 intrinsic groups of muscles of the hand?
1. thenar group 2. hypothenar group 3. central
59
what are the 3 muscles of the thenar group?
abductor pollicis brevis, flexor pollicis brevis, and opponens pollicis
60
what are the origins of the abductor pollicis brevis?
- flexor retinaculum - tubercle of scaphoid - tubercle of trapezium
61
what is the insertion of the abductor pollicis brevis?
lateral side of the base of proximal phalanx of thumb
62
what is the function of the abductor pollicis brevis?
abduction of the thumb
63
what is the innervation of the abductor pollicis brevis?
median nerve
64
what are the origins of flexor pollicis brevis?
flexor retinaculum and trapezium
65
what is the insertion of the flexor pollicis brevis?
lateral side of the base of proximal phalanx of thumb
66
what is the function of the flexor pollicis brevis?
flexion of thumb
67
what is the innervation of flexor pollicis brevis?
median nerve
68
what are the origin of opponens pollicis?
flexor retinaculum and trapezium
69
what is the insertion of the opponens pollicis
1st metacarpal bone
70
what is the function of the opponens pollicis?
opposition of thumb
71
what is the innervation of the opponens pollicis?
median nerve
72
what are the muscles of the hypothenar group?
palmaris brevis, abductor digiti minimi, flexor digit minimi brevis, and opponens digiti minimi
73
what is the origin of palmaris brevis?
palmar aponeurosis
74
what is the insertion of palmaris brevis?
skin of the medial side of the hand
75
what is the function of palmaris brevis?
wrinkles the skin
76
what is the innervation of the palmaris brevis?
ulnar nerve
77
what is the origin of the abductor digiti minimi?
pisiform
78
what is the insertion of the abductor digiti minimi?
medial side of proximal phalanx of little finger or 5th digits
79
what is the function of the abductor digiti minimi?
abduction of the little finger
80
what is the innervation of the abductor digiti minimi?
ulnar nerve
81
what are the origins of the flexor digiti minimi brevis?
flexor retinaculum and hook of hamate
82
what is the insertion of the flexor digiti minimi brevis?
medial side of the base of proximal phalanx of 5th finger
83
what is the function of the flexor digiti minimi brevis?
flexion of the little finger
84
what is the inenrvation of the flexor digiti minimi brevis?
ulnar nerve
85
what are the origins of the opponens digiti minimi?
flexor retinaculum and hook of hamate
86
what is the insertion of the opponens digiti minimi?
5th metacarpal bone
87
what is the function of opponens digiti minimi?
opposition of the 5th finger
88
what is the innervation of the opponens digiti minimi?
ulnar nerve
89
what are the muscles of the central group?
adductor pollicis, lumbrical muscles, and dorsal interosseous muscles
90
what are the origins of the adductor pollicis?
oblique head: - base of 2nd and 3rd metacarpal bones - capitate transverse head: - anterior surface of 3rd metacarpal bone
91
what are the insertion of the adductor pollicis?
both heads: medial side of the base of proximal phalanx of thumb
92
what is the function of the adductor pollicis?
adduction of the thumb
93
what is the innervation of the adductor pollicis?
ulnar nerve
94
what is the origin of the lumbrical muscles?
tendon of the flexor digitorum profundus of each finger
95
what is the insertion of the lumbrical muscles
dorsal digital expansion of 4 medial fingers
96
lumbrical #1 inserts:
into the dorsal digital expansion of the index finger
97
lumbrical #2 inserts:
into the dorsal digital expansion of the middle finger
98
lumbrical #3 inserts:
into the dorsal digital expansion of the ring finger
99
lumbrical #4 inserts:
into the dorsal digiti expansion of the little finger
100
what are the functions of the lumbrical muscles?
1. flexion of fingers #2-5 at MCP joints 2. extension of fingers #2-5 at PIP and DIP joints
101
what are the innervation of the lumbrical muscles?
median nerve for #1 and 2 ulnar nerve for #3 and 4
102
what is the origin of the dorsal interosseous muscles?
adjacent sides of metacarpals
103
what is the insertion of the dorsal interosseous muscles?
base of proximal phalanges and dorsal digital expansion of fingers (#2,3,4)
104
the dorsal interosseous #1 inserts...
to the lateral side of the index finger
105
the dorsal interosseous #2 inserts...
to the lateral side of the middle finger
106
the dorsal interosseous #3 inserts...
to the medial side of the medial finger
107
the dorsal interosseous #4 inserts...
to the medial side of the ring finger
108
what are the functions fo the dorsal interosseous muscles?
- abduction of the fingers #2,3,4 @ MCP joints - flexion of fingers #2,3,4 @ MCP joints - extension of fingers #2,3,4 @ IP joints (PIP and DIP)
109
what is the innervation of the dorsal interosseous muscles
ulnar nerve
110
what are the origins of the palmar interosseous muscles?
anterior side of metacarpal of fingers #2,4,5 - palmar interosseous #1: metacarpal #2 - palmar interosseous #2: metacarpal #4 - palmar interosseous #3: metacarpal #5
111
what is the insertion of the palmar interosseous muscles?
base of proximal phalanges and dorsal digital expansion of fingers (2,4,5) - palmar interosseous #1 to the index finger - palmar interosseous #2 to the lateral ring finger - palmar interosseous #3 to the little finger
112
what are the functions of the palmar interosseous muscles?
- adduction of the fingers #2,4, and 5 @ MCP joints "PAD" - flexion of fingers #2,4, and 5 @ MCP joint - extension of fingers #2,4,and 5 @ IP joints (pip and dip)
113
what is the innervation of the palmar interosseous muscles?
ulnar nerve

MSK test 2 (6 decks)

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