Forearm Flashcards
(129 cards)
1
Q
body of radius has a medial facing sharpened edge indicating the attachment of the
A
interosseus membrane
2
Q
5 muscles that originate on medial epicondyle of humerus
A
pronator teres flexor carpi radialis palmaris longus flexor carpi ulnaris - humeral head flexor digitorum superficialis - humeroulnar head
3
Q
o of pronator teres
A
medial epicondyle of humerus
coronoid process of ulna
4
Q
i of pronator teres
A
middle of lateral surface of radius
5
Q
action of pronator teres
A
pronates forearm and flexes it
6
Q
innervation of pronator teres
A
median n C6-C7
7
Q
Which two muscles are innervated by median n. C6C7
A
pronator teres
flexor carpi radialis
8
Q
o of flexor carpi radialis
A
medial epicondyle of humerus
9
Q
i of flexor carpi radialis
A
base of 2nd metacarpal bone
10
Q
action of flexor carpi radialis
A
flexes hand and abducts it
11
Q
innervation of flexor carpi radialis
A
median n. C6C7
12
Q
o of palmaris longus
A
medial epicondyle of humerus
13
Q
i of palmaris longus
A
distal 1/2 of flexor retinaculum
palmar aponeurosis
14
Q
action of palmaris longus
A
flexes hand
tightens palmar aponeurosis
15
Q
innervation of palmaris longus
A
median n. C7C8
16
Q
O of flexor carpi ulnaris
humeral head
ulnar head
A
medial epicondyle of humerus
olecranon and posterior border of ulna
17
Q
i of flexor carpi ulnaris
A
pisiform bone
hook of hamate bone
5th metacarpal bone
18
Q
action of flexor carpi ulnaris
A
flexes hand
adducts it
(flexion of hand requires both fcr and fcu
19
Q
innervation of flexor carpi ulnaris
A
ulnar n. C7C8
20
Q
which muscle of the anterior surface (superficial and intermediate) is not innervated by median n.
A
flexor carpi ulnaris
21
Q
o of flexor digitorum superficialis
A
humeroulnar -medial epicondyle of humerus, ulnar collateral lig., and coronoid process of ulna
radial head - superior 1/2 of anterior border of radius
22
Q
i of flexor digitorum superficialis
A
bodies of middle phalanges of medial four digits
23
Q
action of flexor digitorum superficialis
A
flexes middle phalanges of medial 4 digits
stronger action flexes proximal phalanges and hands
24
Q
innervation of flexor digitorum superficialis
A
median n. C7-T1
25
used to increase strength and speed of pronation
pronator teres
26
prime mover of pronation, being responsible for initiation and can act as the only pronator during slow unopposed pronation
pronator quadratus
27
articulates with capitulum and radial notch of ulna
radial head
28
o of flexor digitorum profundus
ant surface of ulna
| interosseus membrane
29
i of flexor digitorum profundus
bases of distal phalanges of medial 4 digits
30
a of flexor digitorum profundus
flexes distal phalanges of medial 4 digits
31
innervation of flexor digitorum profundus
medial part - ulnar n. C8T1
| lateral part - median n. C8T1
32
o of flexor pollicis longus
anterior surface of radius
| interosseus membrane
33
i of flexor pollicis longus
base of distal phalanx of thumb
34
action of flexor pollicis longus
flexes phalanges of thumb
35
innervation of flexor pollicis longus
anterior interosseus n C8-T1 (from median n)
36
origin of pronator quadratus
distal 1/4 of anterior surface of ulna
37
i of pronator quadratus
distal 1/4 of anterior surface of radius
38
action of pronator quadratus
primary pronator of forearm
| assist holding radius and ulna together
39
innervation of pronator quadratus
anterior interosseus n. C8T1 (from median n.)
40
which muscle is responsible for increasing speed and strength of pronation?
pronator teres
41
what is the primary pronator and initiator
pronator quadratus
42
o of brachioradialis
proximal 2/3 of lateral supraepiconylar ridge of humerus
43
i of brachioradialis
lateral surface of distal end of radius, proximal to styloid process
44
action of brachioradialis
flexes forearm
45
innervation of brachioradialis
radial n. C5-C7
46
o of extensor carpi radialis longus
lateral supracondylar ridge of humerus
47
i of extensor carpi radialis longus
base of 2nd metacarpal bone
48
action of extensor carpi radialis longus
extend and abduct hand at wrist joint
49
innervation of extensor carpi radialis longus
radial n. C6C7
50
o of extensor carpi radialis brevis
lateral epicondyle of humerus
51
i of extensor carpi radialis brevis
base of 3rd metacarpal bone
52
action of extensor carpi radialis brevis
extend and abduct hand at wrist joint
53
innervation of extensor carpi radialis brevis
deep branch of radial n. C7C8
54
o of extensor digitorum
lateral epicondyle of humerus
55
i of extensor digitorum
extensor expansion of medial 4 digits
56
action of extensor digitorum
extends medial 4 digits at MCP PIP DIP.
| extends hand at wrist
57
innervation of extensor digitorum
posterior interosseus n C7C8 (branch of radial n)
58
o of extensor digiti minimi
lateral epicondyle of humerus
59
i of extensor digiti minimi
extensor expansion of 5th digit
60
action of extensor digiti minimi
extends digit 5 at MCP PIP DIP
61
innervation of extensor digiti minimi
posterior interosseus n C7C8
62
o of extensor carpi ulnaris
lateral epicondyle of humerus
| posterior border of ulna
63
i of extensor carpi ulnaris
base of 5th metacarpal
64
a of extensor carpi ulnaris
extends wrist and ulnar deviation of the hand at the wrist
65
innervation of extensor carpi ulnaris
posterior interosseus n. C7C8
66
o of anconeus
lateral epicondyle of humerus
67
i of anconeus
lateral surface of olecranon
| superior part of posterior surface of ulna
68
action of anconeus
assists triceps in extending elbow
stabilizes elbow
abducts ulna during pronation
69
innervation of anconeus
radial n C7-T1
70
radial deviation of hand needs what muscles
flexor carpi radialis, extensor carpi radials longus and brevis
71
ulnar deviation of hand needs what muscles
flexor carpi ulnaris and extensor carpi ulnaris
72
o of supinator
lateral epicondyle of humerus
radial collateral and annular ligaments
supinator fossa
crest of ulna
73
i of supinator
lateral, posterior and anterior surfaces of proximal 1/3 of radius
74
action of supinator
supinates forearm
75
innervation of supinator
deep branch of radial n. C7C8
76
o of abductor pollicis longus
posterior surfaces of ulna and radius and interosseus membrane
77
i of abductor pollicis longus
base of 1st metacarpal
78
action of abductor pollicis longus
abducts thumb and extends it at CMC joint
79
innervation of abductor pollicis longus
posterior interosseus n C7C8
80
o of extensor pollicis brevis
posterior surface of radius and interosseus membrane
81
i of extensor pollicis brevis
base of proximal phalanx of thumb via extensor expansion
82
a of extensor pollicis brevis
extend thumb: proximal phalanx of thumb at MCP jt
83
innervation of extensor pollicis brevis
posterior interosseus C7C8
84
o of extensor pollicis longus
posterior surface and middle of ulna and interosseus membrane
85
insertion of extensor pollicis longus
base of distal phalanx of thumb via extensor expansion
86
a of extensor pollicis longus
extends distal phalanx of thumb at IP and MCP jt
87
innervation of extensor pollicis longus
posterior interosseus n C7C8
88
o of extensor indicis
posterior surface of ulna and interosseus membrane
89
i of extesnsor indicis
extensor expansion of 2nd digit
90
a of extensor indicis
extends index finger independently
| assists in wrist extension
91
innervation of extensor indicis
posterior interosseus n C7C8
92
primary mover of supination in non-forceful situation
supinator
93
what assists the supinator in strong, forceful movements (using a screwdriver)
biceps brachii
94
which of the forearm bones has a stronger articulation with the humerus
ulna
95
what 3 structures of ulna make the strong hinge-type jt
olecranon, coronoid process, and trochlear notch
96
the radius articulates with the ______ proximally, and is only anchored by the _______ _____ surrounding the head of the radius
capitulum
| annular ring
97
what 2 bones in the hand does the radius articulate with
lunate and scaphoid
98
the styloid process of the _____ extends more distally than the styloid process of the _____
radius
| ulna
99
fracture of the styloid process of the radius and displacement of it proximally
colles fracture
100
in a colles fracture how do you tell
styloid processes at same lvl. may also damage scaphoid bone
101
which two fingers may hurt or tingle when the ulnar n is hit (funny bone)
medial 2
102
primary n for the muscles of the anterior compartment of the forearm
median n
103
median n innervates all the muscles in the flexor compartment except
brachioradialis, flexor carpi ulnaris, medial part of flexor digitorum profundus
104
this muscle is a flexor of the forearm at the elbow, but is usually listed as occupying the posterior compartment of the forearm due to its origin near the common origin of the extensors of the forearm
brachioradialis
105
named muscular branch of the median n arising near the apex of the cubital fossa. courses along the anterior surface of the interosseus membrane to innervate the digit 2,3 of flexor digitorum profundus, flexor pollicis longus and pronator quadratus
anterior interosseus n
106
nerve posterior to medial epicondyle of humerus, deep to flexor carpi ulnaris along flexor digitorum profundus, medial to ulnar a.
ulnar n
107
muscular branches to flexor carpi ulnaris and flexor digitorum profundus
ulnar n
108
innervates medial 1/2 of palmar surface of hand (little and ring finger)
palmar cutaneous branch of ulnar n.
109
innervates medial 1/2 of dorsal surface of hand (little and ring finger)
dorsal cutaneous branch of ulnar n.
110
enters forearm on anterior side of lateral epicondyle between brachialis and brachioradialis. branches into superficial and deep branch
radial n
111
what is the superficial branch of the radial n.
entirely cutaneus-skin of dorsum of wrist, hand, thumb, and dorsum of digits 2,3
112
sweeps around lateral side of radius to extensor compartment
deep branch of radial n
113
innervates supinator and extensor carpi radialis brevis
deep branch of ulnar n.
114
innervates the muscles of the deep extensor compartment
posterior interosseus n.
115
travels with posterior interosseus a, a branch of the ulnar artery
posterior interosseus n. branch of radial n.
116
where does the brachial artery divide into the radial and ulnar branches?
cubital fossa
117
direct line continuation of brachial artery
radial a.
118
the radial a extends distally in the _____ compartment to the _____ and then swings dorsally through the _____
anterior
styloid process of radius
anatomical snuff box
119
the ulnar a sweeps ______ after branching from the brachial a
medially
120
lies on the flexor digitorum profundus, lateral to ulnar n.
ulnar a
121
what does ulnar a supply
medial muscles of hand and forearm, common flexor synovial sheaths and ulnar n.
122
ulnar a turns into ________ that divides into anterior and posterior interosseus aa.
common interosseus a
123
passes distally and then pierces interosseus membrane to join carpal aa
anterior interosseus a
124
passes through the interosseus membrane to reach the extensor compartment of forearm
posterior interosseus a.
125
anatomical snuff box make up
bounded by the tendons of abductor pollicis longus and extensor pollicis brevis anteriorly
the tendon of extensor pollicis longus posteriorly
126
the ____ a passes deep in the anatomical snuff box as it travels from the anterior compartment to the post
radial
127
flexor retinaclm closing over the carpal groove or sulcus
carpal tunnel
128
which muscle is encased in Y shaped attachment of flexor retinaculum to the scaphoid and trapezium carpal bones and does not lie in the carpal tunnel
flexor carpi radialis
129
space occupying lesions in the carpal tunnel will result in compression of ____ and difficult in _____
median n.
| flexion
