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Dorsal Forearm And Hand > Muscles of forearm and hand > Flashcards

Muscles of forearm and hand Flashcards

(78 cards)

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0
Q

Brachioradialis insertion

A

Lateral surface of distal end of radius proximal to styloid process

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1
Q

Brachioradialis origin

A

Proximal two thirds of lateral supra-epicondylar ridge

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2
Q

Brachioradialis innervation

A

Radial nerve c5 c6 c7

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3
Q

Brachioradialis action

A

Weak flexion of elbow joint, maximal when forearm is in mid pronated position

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4
Q

Extensor carpi radialis longus origin

A

Lateral supra epicondylar ridge of humerus

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5
Q

Extensor carpi radialis longus insertion

A

Dorsal aspect of 2nd metacarpal

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6
Q

Extensor carpi radialis longus innervation

A

Radial nerve c6 c7

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7
Q

Extensor carpi radialis longus action

A

Extends and abducts wrist joint, extensor carpi radialis brevis active during fist clenching

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8
Q

Extensor carpi radialis brevis origin

A

Lateral epicondyle of humerus common extensor

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9
Q

Extensor carpi radialis brevis insertion

A

Dorsal aspect of base of 3rd metacarpal

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10
Q

Extensor carpi radialis brevis innervation

A

Deep branch of radial nerve C7 C8

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11
Q

Extensor carpi radialis brevis action

A

Extend and abduct wrist joint Extensor carpi radialis brevis active during fist clenching

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12
Q

Extensor digitorum origin

A

Lateral epicondyle of humerus (common extensor origin )

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13
Q

Extensor digitorum insertion

A

Extensor expansion of medial four fingers

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14
Q

Extensor digitorum innervation

A

Posterior interosseous nerve C7 C8 ,continuation of deep branches of radial nerve

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15
Q

Extensor digitorum action

A

Extend wrist

Extend medial four fingers primary metacarphalangeal joints secondarily interphalangeal joints

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16
Q

Extensor digiti minimi origin

A

Lateral epicondyle of humerus ( common extensor origin )

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17
Q

Extensor digiti minimi insertion

A

5th expansion of 5th digit finger

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18
Q

Extensor digiti minimi innervation

A

Posterior interosseous nerve C7 C8, continuation of deep branch of radial nerve

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19
Q

Extensor digiti minimi action

A

Extends wrist joint
Extends 5th finger
primary metacarphalangeal joints secondarily interphalangeal joints

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20
Q

Extensor carpi ulnaris origin

A

Lateral epicondyle of humerus, posterior border of ulna via shared aponerodis

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21
Q

Extensor carpi ulnaris insertion

A

Dorsal aspect of base of 5th metacarpal

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22
Q

Extensor carpi ulnaris innervation

A

Posterior interosseous nerve C7 C8, continuation of deep branch of radial nerve

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23
Q

Extensor carpi ulnaris action

A

Extends and Adducts wurst joint, also active during wrist clenching

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24
Abductor pollicis longus orgin
Posterior surface of proximal halves of ulna, radius and interosseous membrane
25
Abductor pollicis longus insertion
Base of 1st metacarpal
26
Abductor pollicis longus innervation
Posterior interosseous nerve C7 C8, continuation of deep branch of radial nerve
27
Abductor pollicis longus action
Extends wrist | Abducts thumb and extends it at carpi metacarpal joint
28
Extensor pollicis longus orgin
Posterior surface of middle 3rd of ulna and interosseous membrane
29
Extensor pollicis longus insertion
Dorsal aspect of base of distal phalanx thumb
30
Extensor pollicis longus innervation
Posterior interosseous nerve C7 C8, continuation of deep branch of radial nerve
31
Extensor pollicis longus action
Extends wrist Extends distal phalanx of thumb at interphalangeal joint Extends metacarpophalangeal and carpometacarpAl joints
32
Extensor pollicis brevis orgin
Posterior surface of distal 3rd of radius and interosseous membrane
33
Extensor pollicis brevis insertion
Dorsal aspect of base of proximal phalanx of thumb
34
Extensor pollicis brevis innervation
Posterior interosseous nerve C7 C8, continuation of deep branch of radial nerve
35
Extensor pollicis brevis action
Extends wrist Extends proximal phalanx of thumb at metacarpophalangeal joint Extends carpometacarpal joint
36
Extensor indicis orgin
Posterior surface of distal 3rd ulna and interosseous membrane
37
Extensor indicis insertion
Extensor expansion of 2nd finger
38
Extensor indicis innervation
Posterior interosseous nerve C7 C8, continuation of deep branch of radial nerve
39
Extensor indicis action
Extends joint Extends 2nd finger ( enabling its independent expansion ) Helps extend hand at wrist
40
Supinator orgin
Later epicondyle of humerus , radial collateral and anular ligaments supinator fossa , crest of ulna
41
Supinator insertion
Lateral posterior and anterior anterior surfaces of proximal third of radius
42
Supinator innervation
Deep branch of radial nerve C7 C8
43
Supinator action
Supinates forearm , rotates radius to turn palm anteriorly ( if Elbow is flexed )
44
Pronator teres (pt) orgin
Ulnar head: coronoid process of ulna | Humeral head: medial epicondyle of humerus
45
Pronator teres (pt) insertion
Middle of convexity of lateral surface radius
46
Pronator teres (pt) innervation
Median nerve C6 C7
47
Pronator teres (pt) action
Pronates and flexes forearm
48
Flexor carpi radialis (FCR) orgin
Medial epicondyle of humerus
49
Flexor carpi radialis (FCR) insertion
Base of 2nd and 3rd metacarpal
50
Flexor carpi radialis (FCR) innervation
Median nerve C6 C7
51
Flexor carpi radialis (FCR) action
Flexes and abducts hand and wrist
52
Palmaris longus orgin
Medial epicondyle of humerus
53
Palmaris longus insertion
Distal half of flexor retinaculum, palmar aponeurosis
54
Palmaris longus innervation
Median nerve C7 C8
55
Palmaris longus action
Flexes hand at wrist and tenses palmar aponeurosis
56
Superficial first layer
PronTor teres PT Flexor carpi radialis FCR Palmaris longus
57
Intermediate second layer
Flexor digitorum superficialis (FDS)
58
Flexor digitorum superficialis orgin
Humero-ulnar head: medial epicondyle of humerus and coronoid process of ulna Radial head: oblique line of radius
59
Flexor digitorum superficialis insertion
Shafts ( bodies ) of middle phalanges of medial four digits
60
Flexor digitorum superficialis innervation
Median nerve C7 C8 T1
61
Flexor digitorum superficialis action
Flexes wrist Flexes proximal interphalangeal joints of middle four digits , acting more strongly, it also flexes proximal phalanges at metacarpophalangeal langeal joints
62
Flexor carpi ulnaris Humeral head Ulnar head orgin
Olecranon and posterior border of ulna ( via aponeurosis
63
Flexor carpi ulnaris insertion
Pisiform, hook of hamate, and 5th metacarpal
64
Flexor carpi ulnaris innervation
Ulnar nerve C7 C8
65
Flexor carpi ulnaris action
Flexes and Adducts hand at wrist
66
Flexor pollicis longus orgin
Anterior surface of radius and adjacent interosseous membrane
67
Flexor pollicis longus insertion
Base of distal phalanx of thumb
68
Flexor pollicis longus innervation
Anterior interosseous nerve from median nerve C8 T1
69
Flexor pollicis longus action
Flexes wrist | Flexes metacarpophalangeal and interphalangeal joints of thumb
70
Flexor digitorum profundus orgin
Proximal 3 quarters of medial medial and anterior surfaces of ulna and interosseous membrane
71
Flexor digitorum profundus insertion
Bases of distal phalanges if 2nd 3rd and 4th and 5th digits
72
Flexor digitorum profundus innervation
``` lateral part (to digits 2 and 3) Median nerve C8 T1 ( Anterior interosseous branch ) Medial part ( to digits 4 and 5) Ulnar nerve ( C8 T1) ```
73
Flexor digitorum profundus action
Flexes wrist joint Flexes distal interphalangeal joints of digits 2, 3, 4, and 5 Assists with wrist flexion
74
Pronator quadrates orgin
Distal quarter of Anterior surface of ulna
75
Pronator quadrates insertion
Distal quarter of anterior surface radius
76
Pronator quadrates innervation
Anterior interosseous nerve from median nerve C8 T1
77
Pronator quadrates action
Pronates forearm, deep fibers bind radius and ulna together

Dorsal Forearm And Hand (1 decks)

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