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Gross Anatomy > Muscles Forearm > Flashcards

Muscles Forearm Flashcards

(81 cards)

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1
Q

Superficial muscles of the volar forearm

A

Pronator teres, Flexor carpi radialis, Palmaris longus, Flexor carpi ulnaris

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2
Q

Origin of pronator teres

A

Humeral head - medial epicondyle of humerus

Ulnar head - coronoid process

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3
Q

Insertion of pronator teres

A

Lateral radius

distal to supinator insertion

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4
Q

Innervation of pronator teres

A

Median nerve (C6-C7)

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5
Q

Action of pronator teres

A

Elbow - weak flexor

Forearm - pronation

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6
Q

Origin of flexor carpi radialis

A

Medial epicondyle of humerus

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7
Q

Insertion of flexor carpi radialis

A

Base of 2nd metacarpal

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8
Q

Innervation of flexor carpi radialis

A

Median Nerve (C6-C7)

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9
Q

Action of flexor carpi radialis

A

Wrist - flexion, radial deviation of hand

*radial deviation = abduction

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10
Q

Origin of palmaris longus

A

Medial epicondyle of humerus

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11
Q

Insertion of palmaris longus

A

Palmar aponeurosis

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12
Q

Innervation of palmaris longus

A

Median nerve (C7-C8)

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13
Q

Action of palmaris longus

A

Elbow - weak flexor

Wrist - flexion tightens aponeurosis

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14
Q

Origin of flexor carpi ulnaris

A

Humeral head - medial epicondyle of humerus

Ulnar head - olecranon

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15
Q

Insertion of flexor carpi ulnaris

A

Pisiform, Hook of hammate, base of 5th metacarpal

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16
Q

Innervation of flexor carpi ulnaris

A

Ulnar nerve (C7-T1)

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17
Q

Action of flexor carpi ulnaris

A

Wrist - flexion; ulnar deviation

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18
Q

Intermediate muscles of the volar forearm

A

Flexor digitorum superficialis

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19
Q

Origin of flexor digitorum superficialis

A

Humeroulnar head - medial epicondyle of humerus

Radial head - Upper half of anterior surface of radius

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20
Q

Insertion of flexor digitorum superficialis

A

Sides of middle phalanges of the 2nd to 5th digits

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21
Q

Innervation of flexor digitorum superficialis

A

Median nerve (C8-T1)

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22
Q

Action of flexor digitorum superficialis

A

Elbow - weak flexor

Wrist, MCP, PIP of 2nd to 5th digits - flexion

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23
Q

Deep muscles of volar forearm

A

Flexor digitorum profundus, Flexor Pollicis Longus, Pronator Quadratus

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24
Q

Origin of flexor digitorum profundus

A
  • Proximal 2/3 of anterior surface of ulna

- Interosseus membrane

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25
Insertion of flexor digitorum profundus
Distal phalange of 2nd to 5th digits (palmar surface)
26
Innervation of flexor digitorum profundus
``` Anterior interosseus branch of Median nerve (C8-T1) Ulnar Nerve (C8-T1) ```
27
Action of flexor digitorum profundus
Wrist, MCP, PIP, DIP of 2nd - 5th digits : flexion
28
Origin of Flexor pollicis longus
- Midanterior surface of radius | - Interosseus membrane
29
Insertion of flexor pollicis longus
Distal phalanx of thumb (palmar surface)
30
Innervation of flexor pollicis longus
Anterior interosseus branch of Median nerve (C8-T1)
31
Action of flexor pollicis longus
Wrist - flexion, radial deviation of the hand Carpometacarpal of thumb - flexion MCP, IP of thumb - flexion
32
Origin of pronator quadratus
Distal quarter of ulna (anterior surface)
33
Insertion of pronator quadratus
Distal quarter of radius (anterior surface)
34
Innervation of pronator quadratus
Anterior interosseus branch of Median nerve (C8-T1)
35
Action of pronator quadratus
Hand - pronation | Distal radioulnar joint - stabilization
36
Layers of the muscles of the volar forearm
Superficial, intermediate, deep
37
Origin of Brachioradialis
- Distal surface of humerus | - Lateral intermuscular septum
38
Insertion of brachioradialis
Styloid process of radius
39
Innervation of brachioradialis
Radial nerve (C5-C6)
40
Action of brachioradialis
- Weak elbow flexor (in semipronation) | - Semipronation of elbow
41
Origin of extensor carpi radialis longus
- Lateral supracondylar ridge | - Lateral intermuscular septum
42
Insertion of extensor carpi radialis longus
Base of 2nd metacarpal
43
Innervation of extensor carpi radialis longus
Radial nerve (C6-C7)
44
Action of extensor carpi radialis longus
Elbow - weak flexor | Wrist - radial deviation; extension
45
Origin of extensor carpi radialis brevis
Lateral epicondyle of humerus
46
Insertion of extensor carpi radialis brevis
Base of 3rd metacarpal
47
Innervation of extensor carpi radialis brevis
Radial nerve (C7-C8)
48
Action of extensor carpi radialis brevis
Elbow - weak flexor | Wrist - extension; radial deviation
49
Origin of extensor digiti minimi
Lateral epicondyle of humerus
50
Origin of extensor digitorum
Lateral epicondyle of humerus
51
Insertion of extensor digitorum
Dorsal digital expansion of digits 2-5
52
Innervation of extensor digitorum
Posterior interosseus branch of Radial nerve (C7-C8)
53
Action of extensor digitorum
Wrist - extension | MCP, PIP, DIP of 2nd to 5th digits - extension and abduction of fingers
54
Origin of extensor digiti minimi
Lateral epicondyle of humerus
55
Insertion of extensor digiti minimi
Dorsal digital expansion of 5th digit
56
Innervation of extensor digiti minimi
Posterior interosseus branch of Radial Nerve (C7-C8)
57
Action of extensor digiti minimi
Wrist - extension, ulnar deviation | MCP, PIP, DIP of 5th digit - extension and abduction of 5th digit
58
Origin of Extensor carpi ulnaris
- Lateral epicondyle of humerus | - Dorsal surface of ulnar head
59
Insertion of extensor carpi ulnaris
Base of 5th metacarpal
60
Innervation of extensor carpi ulnaris
Posterior interosseus branch of Radial nerve (C7-C8)
61
Action of extensor carpi ulnaris
Wrist - extension, ulnar deviation
62
Origin of supinator
Olecranon process of ulna, lateral epicondyle of humerus, annular ligament, radial collateral ligament
63
Insertion of supinator
Radius | in between the radial tuberosity and the insertion of the pronator teres
64
Innervation of supinator
Posterior interosseus branch of Radial nerve (C6-C7)
65
Action of supinator
Forearm - supination
66
Origin of abductor pollicis longus
- Posterior surface of radius and ulna | - Interosseus membrane
67
Insertion of abductor pollicis longus
Base of 1st metacarpal
68
Innervation of abductor pollicis longus
Posterior interosseus branch of Radial nerve (C7-C8)
69
Action of abductor pollicis longus
Wrist - radial deviation | CMC of thumb - abduction of thumb
70
Origin of extensor pollicis brevis
- Posterior surface of radius | - Interosseus membrane
71
Insertion of extensor pollicis brevis
Base of proximal phalanx of thumb
72
Innervation of extensor pollicis brevis
Posterior interosseus branch of Radial nerve (C7-C8)
73
Action of extensor pollicis brevis
Wrist - radial deviation | CMC, MCP of thumb - extension of thumb
74
Origin of extensor pollicis longus
- Posterior surface of ulna | - Interosseus membrane
75
Insertion of extensor pollicis longus
Base of distal phalanx of thumb
76
Innervation of extensor pollicis longus
Posterior interosseus branch of Radial nerve (C7-C8)
77
Action of extensor pollicis longus
Wrist - extension and radial deviation CMC of thumb - adduction MCP, IP of thumb - extension
78
Origin of extensor indicis
- Posterior surface of ulna | - Interosseus membrane
79
Insertion of extensor indicis
Dorsal digital expansion of 2nd digit
80
Innervation of extensor indicis
Posterior interosseus branch of Radial nerve (C7-C8)
81
Action of extensor indicis
Wrist - Extension | MCP, PIP, DIP of 2nd digit - extension

Gross Anatomy (11 decks)

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