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Forearm and wrist joint Flashcards

(100 cards)

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1
Q

Describe brachoradialis

A

O: prox 2/3 of supra-epicondylar ridge of humerus
A: lateral surface of distal end of the radius
I: Radial nerve (C5,6,7)
Fn: weak flexion, maximal when midpronation

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2
Q

What is the origin of brachoradialis?

A

proximal 2/3 of supra-epicondylar ridge of humerus

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3
Q

What is the attachment of brachoradialis

A

lateral surface of distal end of radius

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4
Q

What is the innervation of brachoradialis

A

Radial nerve C5,6,7

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5
Q

What is the funtion of brachoradialis

A

Weak flexion, maximal when midpronated

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6
Q

Describe extensor carpi radialis longus

A

O: lateral supracondylar ridge of humerus
A: dorsal aspect of base of 2nd metacarpal
I: radial nerve C6,7
Fn: extends wrist joint and abducts hand

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7
Q

What is the origin of extensor carpi radialis longus?

A

lateral supracondylar ridge of humerus

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8
Q

What is the attachment of extensor carpi radialis longus?

A

dorsal aspect of base of 2nd metacarpal

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9
Q

What is the innervation of extensor carpi radialis longus?

A

Radial nerve C6,7

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10
Q

What is the function of extensor carpi radialis longus?

A

Extends wrist joint and abducts hand

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11
Q

Describe extensor carpi radialis brevis

A

O: lateral epicondyle of humerus
A: dorsal aspect of base of the 3rd metacarpal
I: deep branch of the radial nerve C7,8
Fn: extends and abducts hand at wrist

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12
Q

What is the origin of extensor carpi radialis brevis?

A

Lateral epicondyle of humerus

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13
Q

What is the attachment of extensor carpi radialis brevis?

A

Dorsal aspect of base of 3rd metacarpal

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14
Q

What is the innervation of extensor carpi radialis brevis?

A

Deep branch of radial nerve

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15
Q

What is the function of extensor carpi radialis brevis

A

Extends and abducts hand at wrist

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16
Q

Describe extensor digitorum

A

O: lateral epicondyle of humerus
A: extensor expansions of medial 4 fingers
I: posterior interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve
Fn: extends medial 4 fingers

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17
Q

What is the origin of extensor digitorum

A

Lateral epicondyle of humerus

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18
Q

What is the attachment of extensor digitorum

A

Extensor expansions of medial 4 fingers

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19
Q

What is the innervation of extensor digitorum?

A

posterior interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve

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20
Q

What is the function of extensor digitorum?

A

Extension of medial 4 fingers

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21
Q

Describe extensor digiti minimi

A

O: lateral epicondyle of humerus
A: extensor expansion of the 5th finger
I: posterior interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve
Fn: extension of the pinky finger

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22
Q

What is the origin of extensor digiti minimi

A

lateral epicondyle of the humerus

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23
Q

What is the attachment of extensor digiti minimi

A

extensor expansion of the5th finger

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24
Q

What is the innervation of extensor digiti minimi

A

posterior interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve

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25
What is the function of extensor digiti minimi
extension of the 5th finger
26
Describe extensor carpi ulnaris
O: lateral epicondyle of humerus A: dorsal aspect of the base of 5th metacarpal I: posterior interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve Fn: extends and adducts hand at the wrist
27
What is the origin of extensor carpi ulnaris
medial epicondyle of humerus
28
What is the attachment of extensor carpi ulnaris
dorsal aspect of the base of the 5th metacarpal
29
What is the innervation of extensor carpi ulnaris
posterior interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve
30
What is the function of extensor carpi ulnaris
Extension and adduction of hand
31
What are the muscles in the superficial layer of the posterior compartment of the forearm?
``` Extensor carpi radialis longus + brevis brachoradialis Extensor carpi ulnaris Extensor digitorum Extensor digit minimi ```
32
What are the muscles in the deep layer of the posterior compartment of the forearm?
``` Supinator abductor pollicis longus extensor pollicis longus extensor pollicis brevis extensor indicis ```
33
Describe supinator
O: lateral epicondyle of the humerus A: prox 1/3 of the radius I: deep branch of the radial nerve (C7) Fn: supination
34
What is the origin of supinator
lateral epicondyle of humerus
35
What is the attachment of supinator
prox 1/3 of the radius
36
What is the innervation of supinator
deep branch of the radial nerve (C7)
37
Describe abductor pollicis longus
O: posterior surface of prox 1/2 of ulna, radius and interosseous membrane A: base of 1st metacarpal I: post. interosseous nerve (C7,8) continuation of deep branch of the radial nerve Fn: abducts 1st finger
38
What is the origin of abductor pollicis longus
post surface of prox 1/2 of ulna, radius and interosseous membrane
39
What is the attachment of abductor pollicis longus
base of 1st metacarpal
40
What is the innervation of abductor pollicis longus
post interosseous nerve (C7,8) continuation of deep branch of the radial nerve
41
What is the function of abductor pollicis longus
abduction of thumb
42
Describe extensor pollicis longus
O: post surface of middle 1/3 of ulna and interosseous membrane A: dorsal aspect of base of distal phalanx of thumb I: post. interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve Fn: extension of the thumb
43
What is the origin of extensor pollicis longus
post surface of middle 1/3 of ulna and interosseous membrane
44
What is the attachment of extensor pollicis longus
dorsal surface of base of distal phalanx of thumb
45
What is the innervation of extensor pollicis longus
post interosseous membrane (C7,8) a continuation of the deep branch of the radial nerve
46
What is the function of extensor pollicis longus?
extension of the thumb
47
Describe extensor pollicis brevis?
O: post surface of distal 1/3 of radius and interosseous membrane A: dorsal aspect of base of prox phalanx of thumb I: post. interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve Fn: extension of thumb
48
What is the origin of extensor pollicis brevis?
post surface of distal 1/3 of radius and interosseous membrane
49
What is the attachment of extensor pollicis brevis?
dorsal surface of base of proximal phalanx of thumb
50
What is the innervation of extensor pollicis brevis?
post. interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve
51
What is the function of extensor pollicis brevis
extension of thumb
52
Describe extensor indicis
O: post surface of distal 1/3 of ulna + interosseous membrane A: extensor expansion of index finger I: post. interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve Fn: extends index finger
53
What is the origin of extensor indicis
post surface of distal 1/3 of the ulna and interosseous membrane
54
What is the attachment of extensor indicis
extension expansion of index finger
55
What is the innervation of extensor indicis
post. interosseous nerve (C7,8) a continuation of the deep branch of the radial nerve
56
What is the function of extensor indicis
extension of index finger
57
What lines the anatomical snuff box
extensor pollicis longus and brevis
58
How does the radial nerve in the arm?
Anteriorly in the arm until the elbow (where it runs past the funny bone) and then is posteriorly and laterally
59
What muscles make up the superficial layer of the anterior compartment of the forearm?
``` Pronator teres flexor carpi radialis palmaris longus flexor carpi ulnaris flexor digitorum superficialis ```
60
Describe pronator teres
O: (ulnar head) coronoid process of ulna (humeral head) medial epicondyle of humerus A: middle convexity of lateral surface of radius I: median nerve (C6,7) Fn: pronates and flexes forearm
61
What is the origin of pronator teres?
ulnar head: coronoid process of ulna | humeral head: medial epicondyle of humerus
62
What is the attachment of pronator teres ?
middle convexity of lateral surface of radius
63
What is the innervation of pronator teres?
median nerve (C6,7)
64
What is the function of pronator teres?
pronates + flexes forearms
65
Describe flexor carpi radialis
O: medial epicondyle of humerus A: base of 2nd metacarpal I: median nerve (C6,7) Fn: flexes and abducts hand
66
What is the origin of flexor carpi radialis
medial epicondyle of humerus
67
What is the attachment of flexor carpi radialis
base of 2nd metacarpal
68
What is the innervation of flexor carpi radialis
median nerve (C6,7)
69
What is the function of flexor carpi radialis
flexes and abducts hand
70
Describe palmaris longus
O: medial epicondyle of humerus A: palmar aponeurosis I: median nerve (C7,8) Fn: flexes head + tenses aponeurosis
71
What is the origin of palmaris longus?
medical epicondyle of humerus
72
What is the attachment of palmaris longus
palmar aponeurosis
73
What is the innervation of palmaris longus
median nerve (C7,8)
74
What is the function palmaris longus?
flexes head + tenses aponeurosis
75
Describe flexor carpi ulnaris
O: olecranon A: 5th metacarpal I: ulnar nerve (C7,8) Fn: flexes + adducts hand
76
What is the origin of flexor carpi ulnaris?
olecranon
77
What is the attachment of flexor carpi ulnaris
5th metacarpal
78
What is the innervation of flexor carpi ulnaris
median nerve (C7,8)
79
What is the function of flexor carpi ulnaris?
flexes and adducts hand
80
Describe flexor digitorum superficialis
``` O: (humero-ulnar head) medial epicondyle of humerus (radial head) oblique line of radius A: middle phalanges of medial 4 digits I: median nerve (C7,8 T1) Fn: flexes digits ```
81
What is the origin flexor digitorum superficialis
(humero-ulnar head) medial epicondyle of humerus | (radial head) oblique line of radius
82
What is the attachment of flexor digitorum superficialis
middle phalanges of medial 4 digits
83
What is the innervation of flexor digitorum superficialis
median nerve (C7,8 T1)
84
What is the function of flexor digitorum superficialis
flexes digits
85
What muscles make up the deep layer of the anterior compartment of the forearm?
Flexor digitorum profundus flexor pollicis longus pronator quadratus
86
Describe flexor digitorum profundus
O: prox. 3/4 of medial and ant surfaces of ulna interosseous membrane A: bases of distal phalanges of medial 4 digits I: index and middle = median nerve; ring and pinky = ulnar nerve Fn: flexor of digits + assists w/ wrist flexion
87
What is the origin of flexor digitorum profundus
prox. 3/4 of medial and ant. surfaces of ulna interosseous
88
What is the attachment of flexor digitorum profundus
bases of distal phalanges of medial 4 digits
89
What is the innervation of flexor digitorum profundus
index + middle = median nerve; ring + pinky = ulnar nerve
90
What is the function of flexor digitorum profundus
flexor of digits + assists w/wrist flexion
91
Describe flexor pollicis longus
O: ant surface of radius A: base of distal phalanx of thumb I: ant interosseous nerve (from median nerve) Fn: flexes thumb
92
What is the origin of flexor pollicis longus
ant surface of radius
93
What is the attachment of flexor pollicis longus
base of distal phalanx of thumb
94
What is the innervation of the flexor pollicis longus
ant interosseous nerve, from the median nerve
95
What is the function of flexor pollicis longus
flexes thumb
96
Describe pronator quadratus
O: distal 1/4 of ant surface of ulna A: distal 1/4 of ant surface of radius I: ant interosseous nerve, from median nerve Fn: pronates forearm
97
What is the origin of pronator quadratus
distal 1/4 of ant surface of ulna
98
What is the attachment of pronator quatratus
distal 1/4 of ant surface of radius
99
What is the innervation of pronator quadratus
ant interosseous nerve, from median nerve
100
What structure limits the abduction of the wrist
styloid process of the radius

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