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Anatomy > Muscles of the Forearm & Hand > Flashcards

Muscles of the Forearm & Hand Flashcards

(56 cards)

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1
Q

Brachialis action

A

Flex the elbow

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2
Q

Brachialis O & I

A

O: Distal half of the anterior surface of the humerus
I: Tuberosity & coronoid process of the ulna

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3
Q

Brachialis innervation

A

Musculocutaneous nerve, small branch from radial, C5, C6

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4
Q

Brachioradialis action

A

1) Flex elbow
2) Assist to pronate & supinate the arm when these movements are resisted

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5
Q

Brachioradialis O & I

A

O: Proximal 2/3 of the lateral supracondylar ridge of the humerus
I: Radial styloid process

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6
Q

Brachioradialis innervation

A

Radial nerve C5, C6

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7
Q

Extensor carpi radialis longus & brevis actions

A

1) Extend the wrist
2) Radially deviate the wrist
3) Assist to flex the elbow

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8
Q

Extensor carpi radialis longus O & I

A

O: Distal 3rd of the lateral supracondylar ridge of humerus (distal to BRad origin
I: Base of second metacarpal

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9
Q

Extensor carpi radialis brevis O & I

A

O: Common extensor tendon of lateral epicondyle of the humerus
I: Base of 3rd metacarpal

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10
Q

ECRB Innervation

A

Radial nerve C6, C7, 8

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11
Q

ECRL Innervation

A

Radial nerve C5, 6, 7, 8

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12
Q

Extensor carpi ulnaris actions

A

1) Extend the wrist
2) Ulnarly deviate the wrist

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13
Q

Extensor carpi ulnaris O & I

A

O: Common extensor tendon from lateral epicondyle of the humerus
I: Base of 5th metacarpal

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14
Q

Extensor carpi ulnaris innervation

A

Radial nerve C6, C7, C8

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15
Q

Flexor carpi radialis action

A

1) Flexion of the wrist
2) Radial deviation of the wrist

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16
Q

Flexor carpi radialis O & I

A

O: Medial epicondyle of the humerus
I: Bases of 2nd & 3rd metacarpal bones

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17
Q

Flexor carpi radialis (FCR) innervation

A

Median nerve (C6-C7)

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18
Q

Flexor carpi ulnaris (FCU) action

A

1) Flexion at the wrist
2) Ulnar deviation at the wrist

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19
Q

Flexor carpi ulnaris O & I

A

O: Medial epicondyle of humerus + nearby regions of ulna & olecranon

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20
Q

Flexor carpi ulnaris innervation

A

Ulnar nerve (C8-T1)

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21
Q

Palmaris longus action

A

Flexion at the wrist

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22
Q

Palmaris longus O & I

A

O: Medial epicondyle of the humerus
I: Palmar aponeurosis & flexor retinaculum

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23
Q

Palmaris longus innervation

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A

Median nerve (C6-C7)

24
Q

Pronator quadratus action

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A

Pronates the forearm

25
Pronator quadratus O & I
O: Distal ulna (anterior & medial) I: Distal radius (anterolateral)
26
Pronator quadratus innervation
Median nerve (C8-T1)
27
Pronator teres action
1) Pronate forearm 2) Flex elbow
28
Pronator teres O & I
O: Medial epicondyle of the humerus & coronoid process of the ulna I: Anterolateral surface of distal portion of the ulna (same as pronator quadratus)
29
Pronator teres innervation
Median nerve (C6-C7)
30
Supinator O & I
O: Lateral epicondyle of the humerus I: Anterolateral surface of the radius, distal to the radial tuberosity
31
Abductor pollicis longus action
1) Abduct thumb 2) Radially deviate the wrist
32
Abductor pollicis longus O & I
O: Proximal dorsal surface of radial & ulna I: Lateral margin of 1st metacarpal bone, trapezium
33
Abductor pollicis longus innervation
Deep radial nerve (C6-C7)
34
Extensor digitorum action
Extension of fingers & wrist
35
Extensor digitorum O & I
O: Lateral epicondyle of the humerus I: Posterior surfaces of phallanges 2-5
36
Extensor digitorum innervation
Deep radial nerve (C6-C7)
37
Extensor pollicis brevis action
Extension of 1st CMC & MCP (not IP), radial deviation of wrist
38
Extensor pollicis brevis O & I
O: Shaft of radius, distal to origin of abductor pollicis longus & interosseus membrane I: Base of proximal phalanx of the thumb
39
Extensor pollicis brevis innervation
Deep radial nerve (C6-C7)
40
Extensor pollicis longus action
Extension of all thumb joints (including IP), radial deviation of the wrist
41
Extensor pollicis longus (EPL) origin & insertion
O: Posterior & lateral surface of the ulna & interosseous membrane I: Base of distal phalanx of thumb
42
EPL innervation
Deep radial nerve (C6-C7)
43
Extensor indicis action
Extension and adduction of index finger
44
Extensor indicis origin & insertion
O: Posterior surface of ulna & interosseous membrane I: Posterior surface of proximal phalanx with tendon of extensor digitorum
45
Extensor indicis innervation
Deep radial nerve (C6-C7)
46
Extensor digiti minimi action
1) Extensor o f D5 2) Extension of wrist
47
Extensor digiti minimi O & I
O: Via extensor tendon, lateral epicondyle of humerus I: Posterior surface of proximal phalanx of D5
48
Extensor digiti minimi innervation
Deep radial nerve (C6-C7)
49
Flexor digitorum superficialis (FDS) action
Flexion at the PIP, MCP & wrist joints
50
FDS O & I
O: Medial epicondyle of humerus I: Bases of middle phalanges D2-5
51
FDS innervation
Median nerve (C7-T1)
52
FDP action
Flexion at the DIP, PIP, & wrist ( but to a lesser degree PIP & wrist)
53
FDP O & I
O: Medial and posterior surface of ulna, medial surface of coronoid process, interosseous membrane I: distal phallanges of D2-5
54
Flexor pollicis longus action
Flexion of all thumb joints
55
Flexor pollicis longus O & I
O: Anterior shaft of radius I: Interosseous membrane
56
FPL innervation
Median nerve (C8-T1)

Anatomy (3 decks)

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