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Cell Anat 2200 > Hand > Flashcards

Hand Flashcards

(88 cards)

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1
Q

extensor carpi radialis longus origin

A

lateral supracondyle ridge of humerus

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2
Q

extensor carpi radialis brevis origin

A

lateral epicondyle of humerus

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3
Q

list the carpal muscles

A
  1. scaphoid
  2. lunate
  3. triquetrium
  4. pisiform
  5. trapezium
  6. trapezoid
  7. capitate
  8. hamate
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4
Q

what is the most common bone to fracture (and how)

A

scaphoid bone, falling on outstretched hand

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5
Q

extensor carpi radialis longus insertion

A

base of second metacarpal

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6
Q

extensor carpi radialis brevis action

A

extends and abducts hand at wrist joint

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7
Q

extensor carpi radialis brevis innervation

A

radial nerve

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8
Q

extensor carpi radialis brevis insertion

A

base of third metacarpal

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9
Q

extensor carpi radialis longus action

A

extends and abducts hand at wrist joint

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10
Q

extensor carpi radialis longus innervation

A

radial nerve

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11
Q

extensor digitorum origin

A

lateral epicondyle of humerus

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12
Q

extensor digitorum insertion

A

extensor expansions of medial 4 digits - single muscle belly splits into 4 tendons and inserts as sheets over the digits

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13
Q

extensor digitorum action

A

extends the medial 4 fingers at hte metacarpophalangeal joints and extends hand at the wrist joint

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14
Q

extensor digitorum innervation

A

radial nerve

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15
Q

extensor carpi ulnaris origin

A

lateral epicondyle of humerus and posterior border of ulna

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16
Q

extensor carpi ulnaris insertion

A

base of 5th metacarpal

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17
Q

extensor carpi ulnaris action

A

extends and adducts hand at wrist joint

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18
Q

extensor carpi ulnaris innervation

A

radial nerve

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19
Q

supinator origin

A

lateral epicondyle of humerus, radial collateral and annular ligaments, supinator fossa and crest of ulna

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20
Q

supinator insertion

A

lateral, posterior, and anterior surfaces of proximal 1/3 of radius

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21
Q

supinator action

A

supinates the forearm

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22
Q

supinator innervation

A

radial nerve

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23
Q

extensor indicis origin

A

posterior surface of ulna (distal end) and interosseous membrane

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24
Q

extensor indicis insertion

A

extensor expansion of second digit

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25
extensor indicis action
extends index finger and helps to extend the hand - allows for more precise movement and control of index finger
26
extensor indicis innervation
radial nerve
27
abductor pollicis longus origin
posterior surface of ulna, radius, and interosseous membrane
28
abductor pollicis longus insertion
base of 1st metacarpal (thumb)
29
abductor pollicis longus action
abducts thumb and extends it at carpo-metacarpal joint
30
abductor pollicis longus innervation
radial nerve
31
extensor pollicis longus origin
posterior surface of middle 1/3 of ulna and interosseous membrane
32
extensor pollicis brevis origin
posterior surface of radius and interosseous membrane
33
extensor pollicis longus insertion
base of distal phalanx of thumb
34
extensor pollicis brevis insertion
base of proximal phalanx of thumb
35
extensor pollicis longus action
extends distal phalanx of thumb at carpometacarpal and interphalangeal joints (video game thumb)
36
extensor pollicis longus innervation
radial nerve
37
extensor pollicis brevis innervation
radial nerve
38
extensor pollicis brevis action
extends proximal phalanx of thumb at carpometacarpal joint (stiff thumb movement)
39
what tendons make up the anatomical snuff box
tendon of extensor pollicis longus and tendon of abductor pollicis longus and extensor pollicis brevis
40
what artery runs through the anatomical snuff box
radial artery
41
what bone is found in anatomical snuff box
scaphoid bone
42
list the extrinsic muscles that act on the thumb
1. flexor pollicis longus 2. abductor pollicis longus 3. extensor pollicis longus 4. extensor pollicis brevis
43
list the intrinsic muscles that act on the thumb
1. abductor pollicis brevis 2. flexor pollicis brevis 3. opponents pollicis 4. adductor pollicis
44
what are the intrinsic muscles of the hand responsible for
fine movements
45
what are the three groups of intrinsic hand muscles
1. thenar muscles 2. hypothenar muscles 3. palmar muscles
46
list the thenar muscles and what they act on
1. abductor pollicis brevis 2. flexor pollicis brevis 3. opponents pollicis 4. adductor pollicis act on thumb
47
list the hypothenar muscles and what they act on
1. abductor digiti minimi 2. opponens digit minimi 3. flexor digiti minimi pinky finger
48
what are the two major groups of palmar muscles
1. lumbricals 2. interosseus
49
what are the two types of interosseus muscles and how many of each
palmar (PAD) - 3 dorsal (DAB) - 4
50
abductor pollicis brevis origin
flexor rretinaculum and tubercles of scaphoid and trapezium
51
abductor pollicis brevis insertion
lateral side of base of proximal phalanx of thumb
52
abductor pollicis brevis action
abducts thumb (and helps oppose it)
53
abductor pollicis brevis innervation
median nerve
54
flexor pollicis brevis origin
flexor retinaculum and tubercles of scaphoid and trapezium
55
flexor pollicis brevis insertion
lateral side of base of proximal phalanx of thumb
56
flexor pollicis brevis action
flexes thumb
57
flexor pollicis brevis innervation
median nerve
58
opponens pollicis origin
flexor retinaculum and tubercles of scaphoid and trapezium
59
opponens pollicis insertion
lateral side of 1st metacarpal
60
opponens pollicis action
draws first metacarpal laterally to oppose thumb towards centre of palm and rotates it medially
61
opponens pollicis innervation
median nerve
62
adductor pollicis origin
2nd and 3rd metacarpals
63
adductor pollicis insertion
proximal phalanx and 1st metacarpal
64
adductor pollicis action
adduct thumb
65
adductor pollicis innervation
ulnar nerve
66
abductor digiti minimi origin
pisiform
67
abductor digiti minimi insertion
medial side of base of proximal phalanx of little finger`
68
abductor digiti minimi action
abducts little finger
69
abductor digiti minimi innervation
ulnar nerve
70
flexor digiti minimi brevis origin
hook of hamate and flexor retinaculum
71
flexor digiti minimi brevis insertion
medial side of base of proximal phalanx of little finger
72
flexor digiti minimi brevis action
flexes proximal phalanx of little finger
73
flexor digiti minimi brevis innervation
ulnar nerve
74
opponens digiti minimi origin
hook of hamate and flexor retinaculum
75
opponens digiti minimi insertion
medial border of 5th metacarpal
76
opponens digiti minimi action
draws 5th metacarpal anteriorly and rotates it to bring pinking into opposition with thumb
77
lumbricals origin
tendons of flexor digitorum profundus (anterior side)
78
lumbricals insertion
extensor expansions on dorsal surface of each finger (wrap around)
79
lumbricals action
flexion at metacarpophalangeal joints while maintaining extension at interphalangeal joints
80
lumbricals innervation
median nerve - 1,2 (2nd and 3rd digits) ulnar nerve - 3,4 (4th and 5th digits)
81
palmar interossei origin
metacarpal
82
dorsal interossei origin
metacarpal
83
dorsal interossei insertion
proximal phalanx
84
palmar interossei insertion
proximal phalanx
85
palmar interossei action
adduct fingers toward middle finger
86
dorsal interossei action
abduct fingers away from middle finger
87
dorsal interossei innervation
ulnar nerve
88
palmar interossei innervation
ulnar nerve

Cell Anat 2200 (8 decks)

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