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Anatomy > Forearm > Flashcards

Forearm Flashcards

1
Q

Name the anterior compartment muscles of the forearm

A

Pronation Teres
Flexor carpi radialis
Palmaris longus
Flexor digitorum superficialis
Flexor carpi ulnaris
Flexor digitorum profundus
Flexor policis longus
Pronation Quadratus

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2
Q

Which muscles produce pronation at radio-ulnar joint?

A

Pronator Teres
Pronator Quadratus
Brachioradialis

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3
Q

Which muscles produce supination at the radio-ulnar joint?

A

Supination
Biceps brachii
Brachioradialis

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4
Q

Which muscles produce flexion at the wrist?

A

Flexor carpi radialis and flexor carpi ulnaris

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5
Q

Which muscle produce extension at the wrist?

A

Extensor carpi radialis Longus
Extensor carpi radialis Brevis
Extensor carpi ulnaris

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6
Q

Which muscles produce radial deviation?

A

Flexor carpi radialis
Extensor carpi radialis longus
Extensor carpi radialis brevis

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7
Q

Which muscles produce ulnar deviation?

A

Flexor carpi ulnaris
Extensor carpi ulnaris

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8
Q

Name the superficial flexors (in the anterior compartment of the forearm)

A

Flexor carpi radialis
Palmaris longus
Flexor digitorum superficialis
Flexor carpi ulnaris

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9
Q

Which muscle lies most laterally in the superficial group of the anterior compartment of the forearm?

A

Flexor rapid radialis

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10
Q

Where does flexor carpi radialis originate?

A

Medial epicondyle of humerus (via common flexor tendon)

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11
Q

Where does flexor carpi radialis insert?

A

Palmar surface of bases of metacarpals 2 and 3

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12
Q

What is the nerve supply of flexor carpi radialis?

A

Median nerve C6,7

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13
Q

What are the actions of flexor carpi radialis?

A

Flexion and abduction at wrist

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14
Q

What is the name of the muscle that not everybody has in their forearm?

A

Palmaris Longus

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15
Q

Where does Palmaris longus originate?

A

Medial epicondyle of humerus (common flexor tendon)

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16
Q

Where does Palmaris longus insert?

A

Flexor retinaculum and apex of Palmar aponeurosis

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17
Q

What is the nerve supply of palmaris longus?

A

Median nerve C7,8

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18
Q

What are the actions of palmaris longus?

A

Weak wrist flexor
Tightens palmar fascia

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19
Q

What muscles produce flexion of the fingers?

A

Flexor digitorum superficialis
Flexor digitorum profundus

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20
Q

What muscle produces flexion of the thumb?

A

Flexor policis Longus

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21
Q

Where do the two heads of flexor digitorum profundus originate?

A

Medial epicondyle of humerus (via common flexor tendon) and coronoid process of ulna
Proximal 2/3 anterior border of radius

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22
Q

Where does flexor digitorum superficialis insert?

A

Insert by 4 tendon to either side palmar surface of middle phalanx of each finger

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23
Q

What is the nerve supply of flexor digitorum superficialis?

A

Median nerve C6,7,8 T1

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24
Q

What are the actions of flexor digitorum superficialis?

A

Flexion at wrist, MCP and PIP joints
Tendon arrangement increases power of grip

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25
Q

What are the deep flexors (of the anterior compartment of the forearm)?

A

Flexor pollicis longus
Flexor digitorum profundus

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26
Q

Where does flexor digitorum profundus originate?

A

Medial side coronoid process, anterior and medial surfaces of ulna and interosseous membrane

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27
Q

here does flexor digitorum profundus insert?

A

Attaches by 4 tendons to bas of palmar surface of distal phalanx of each finger

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28
Q

What is the nerve supply of flexor digitorum profundus?

A

Anterior interosseous nerve C7,8,T1 and ulnar nerve C8,T1

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29
Q

What are the actions of flexor digitorum profundus?

A

Flexion of DIP joint of fingers
Flexion of PIP and MCP joints
Flexion of wrist joint

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30
Q

Where does flexor pollicis longus originate?

A

Anterior surface of radius and adjacent interosseous membrane

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31
Q

Where does flexor pollicis longus insert?

A

Palmar surface base of distal phalanx of thumb

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32
Q

What is the nerve supply of flexor pollicis longus?

A

anterior interosseous nerve C8,T1

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33
Q

What are the actions of flexor pollicis longus?

A

Flexion ar CMCP, MCP and Ip joint of thumb
Assist in flexion at wrist joint

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34
Q

What are the contents of the carpal tunnel?

A

9 tendons -> 4 FDS, 4FDP, FPL
Median nerve

35
Q

Name the superficial muscles of the posterior compartment of the forearm

A

Brachioradialis
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor digitorum
Extensor digiti minimi
Extensor carpi ulnaris

36
Q

name the deep muscles of the posterior compartment of the forearm

A

Supinator
Abductor pollicis longus
Extensor pollicis longus
Extensor pollicis brevis
Extensor indicis

37
Q

What is the origin of extensor carpi radialis longus?

A

Lateral supracondylar ridge of humerus (above the common extensor origin)

38
Q

Where does extensor carpi radialis insert?

A

Posterior surface base of metacarpal 2

39
Q

What is the nerve supply of extensor carpi radialis longus?

A

Radial nerve C6,7

40
Q

What are the actions of extensor carpi radialis longus?

A

Extension and abduction of hand at wrist joint

41
Q

Where is the origin of extensor carpi radialis brevis?

A

Lateral epicondyle of humerus (via common extensor tendon)

42
Q

Here does extensor carpi radialis brevis insert?

A

Posterior surface base of metacarpal 3

43
Q

What is the nerve supply of extensor carpi radialis brevis?

A

Posterior interosseous nerve C6,7

44
Q

Hat are the actions of extensor carpi radialis brevis?

A

Extension and abduction at wrist joint

45
Q

Where is the origin of extensor carpi ulnaris?

A

Lateral epicondyle of humerus (via common extensor tendon)
By shared aponeurosis from posterior border of ulna

46
Q

Where does extensor carpi ulnaris insert?

A

Medial side of base of metacarpal 5

47
Q

What is the nerve supply of extensor carpi ulnaris?

A

Posterior interosseous nerve C7,8

48
Q

What are the actions of extensor carpi ulnaris?

A

Extension and adduction of hand at wrist joint

49
Q

Which muscles produce extension of fingers?

A

Extensor digitorum
Extensor digiti minimi
Extensor indicis

50
Q

Which muscles produce extension of the thumb?

A

Extensor pollicis longus
Extensor pollicis brevis

51
Q

Which muscles produce abduction of the thumb?

A

Abductor pollicis longus

52
Q

Where does extensor digitorum originate?

A

Lateral epicondyle of humerus (common extensor tendon)

53
Q

Where does extensor Digitorum insert?

A

Attaches by 4 tendons to bases of middle and distal phalanges of each finger

54
Q

What is the nerve supply of extensor digitorum?

A

Posterior interosseous nerve C7,8

55
Q

What are the actions of extensor digitorum?

A

Extension of the MCP joint of each finger
Assists extension of IP joints

56
Q

Where does extensor digiti minimi originate?

A

Lateral epicondyle of humerus (common extensor tendon)

57
Q

Where does extensor digiti minimi insert?

A

Dorsal digital expansion of digit 5

58
Q

Hat is the nerve supply of extensor digiti minimi?

A

Posterior interosseous nerve C7,8

59
Q

What are the actions of extensor digiti minimi?

A

Extension at MCP joint of little finger
Assists extension of IP joints

60
Q

Where does extensor indicis originate?

A

Posterior surface of the distal ulna and interosseous membrane

61
Q

Where does extensor indicis insert?

A

Dorsal digital expansion of index finger

62
Q

What is the nerve supply of extensor indicis?

A

Posterior interosseous nerve C6,7

63
Q

What are the actions of extensor indicis?

A

Extension of Ip and MCP joints of index finger

64
Q

Where does extensor pollicis longus originate?

A

Posterior surface of middle third of ulna and interosseous membrane

65
Q

Here does extensor pollicis longus insert?

A

Dorsal surface of base of distal phalanx of thumb

66
Q

What is the nerve supply of extensor pollicis longus?

A

Posterior interosseous nerve C7,8

67
Q

What are the actions of extensor pollicis longus?

A

Extension at IP joint
Assists extension at MCP, CMC and wrist joints

68
Q

Where does extensor pollicis brevis originate?

A

Posterior surface of middle of ulna and interosseous membrane

69
Q

Here does extensor pollicis brevis insert?

A

Dorsal surface of proximal phalanx of thumb

70
Q

Hat is the nerve supply of extensor pollicis brevis?

A

Posterior interosseous nerve C7,8

71
Q

Hat are the actions of extensor pollicis brevis?

A

Extension of MCP and CMC joints of thumb

72
Q

Where does abductor pollicis longus originate?

A

Posterior surface of upper ulna and middle radius and intervening interosseous membrane

73
Q

Where does abductor pollicis longus insert?

A

Radial side of base of metacarpal 1

74
Q

Hat is the nerve supply of abductor pollicis longus?

A

Posterior interosseous nerve C7,8

75
Q

What are the actions of abductor pollicis longus?

A

Assists extension and abduction at 1st carpometacarpal joint
Assists abduction at wrist

76
Q

Which muscles are supplied by ulnar nerve?

A

Flexor carpi ulnaris
Medial half of flexor digitorum profundus

77
Q

Which muscles are supplied by the median nerve?

A

Pronator Teres
Flexor carpi radialis
Palmaris longus
Flexor digitorum superficialis

78
Q

Which muscles are supplied by anterior interosseous nerve?

A

Lateral half of flexor digitorum profundus
Flexor pollicis longus
Pronator Quadratus

79
Q

Which muscles are supplied by the radial nerve?

A

Brachioradialis
Extensor carpi radialis longus

80
Q

Which muscles are supplied by posterior interosseous nerve?

A

Extensor Carpi Radialis Brevis
Extensor Carpi Ulnaris
Extensor Digitorum
Extensor Digiti Minimi
Extensor Indicis
Extensor Pollicis Longus
Extensor Pollicis Brevis
Abductor Pollicis Longus

81
Q

Which muscles originate from the common extensor origin?

A

Supinator
Extensor digitorum
Extensor digiti minimi
Extensor carpi ulnaris
Anconeus
Extensor carpi radialis brevis

82
Q

Which muscles originate from the common flexor tendon?

A

Pronator Teres
Palmaris Longus
Flexor carpi radialis
Flexor carpi ulnaris
Flexor digitorum superficialis

83
Q

Which two muscles originate from the lateral supracondylar ridge of the humerus?

A

Brachioradialis
Extensor carpi radialis longus

Anatomy (15 decks)

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