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(J) Muscles > Antebrachial Muscles > Flashcards

Antebrachial Muscles Flashcards

1
Q

What is the common proximal attachment of the superficial muscles in the anterior compartment of the antebrachium?

A

Medial epicondyle of the humerus

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2
Q

What is the common innervation of the superficial muscles in the anterior compartment of the antebrachium?

A

Median and ulnar nerve

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3
Q

What is the common action of the superficial muscles in the anterior compartment of the antebrachium?

A

Flexion of the wrist and digits

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4
Q

What is the proximal attachment of the flexor digitorum superficialis?

A
  • humero-ulnar head

- radial head

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5
Q

What is the distal attachment of the flexor digitorum superficialis?

A

Shafts of middle phalanges of digits II-V

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6
Q

What innervates the flexor digitorum superficialis?

A

Median nerve

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7
Q

What are the actions of the flexor digitorum superficialis?

A

Independent flexion of the middle phalanges of digits II-V

Flexion of proximal phalanges by continued action

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8
Q

What is the proximal attachment of the flexor digitorum profundus?

A

Proximal two thirds of anterior ulna

Interosseous membrane

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9
Q

What is the distal attachment of the flexor digitorum profundus?

A

Distal phalanges of digits 2-5

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10
Q

What innervates the flexor digitorum profundus?

A

Median nerve via anterior interosseous nerve

Ulnar nerve

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11
Q

What are the actions of the flexor digitorum profundus?

A

Flexion of the DIP joints of digits 2-5

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12
Q

What is the blood supply of the flexor digitorum profundus?

A

Anterior interosseous artery

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13
Q

What is the proximal attachment of the flexor pollicus longus?

A
  • mid-anterior surface of the radius

- interosseous membrane

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14
Q

What is the distal attachment of the flexor pollicus longus?

A

-distal phalanx of thumb

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15
Q

What innervates the flexor pollicus longus?

A

-median nerve

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16
Q

What are the actions of the flexor pollicis longus?

A

-flexion of distal phalanx of thumb

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17
Q

What is the common proximal origin of the superficial muscles in the posterior compartment of the antebrachium?

A

-lateral epicondyle of the humerus

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18
Q

What is the common action of the superficial muscles in the posterior compartment of the antebrachium?

A

-wrist and/or hand extension

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19
Q

What is the common innervation of the superficial muscles in the posterior compartment of the antebrachium?

A

-radial nerve via deep branch of radial nerve or posterior interosseous nerve

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20
Q

What is the proximal attachment of the brachioradialis?

A

-proximal two thirds of the supraepicondylar ridge of humerus

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21
Q

What is the distal attachment of the brachioradialis?

A

-distal radius proximal to styloid process

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22
Q

What innervates the brachioradialis?

A

-radial nerve

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23
Q

What is the blood supply of the brachioradialis?

A

-radial artery and branches

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24
Q

What are the actions of the brachioradialis?

A

-flexion of the forearm when pronated

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25
Q

What is the proximal attachment of the extensor carpi radialis longus?

A

-lateral supracondylar ridge of the humerus

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26
Q

What is the distal attachment of the extensor carpi radialis longus?

A

-dorsal base of second metacarpal

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27
Q

What innervates the extensor carpi radialis longus?

A

-radial nerve

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28
Q

What is the blood supply of extensor carpi radialis longus?

A
  • radial artery and branches

- interosseous artery branches

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29
Q

What are the actions of the extensor carpi radialis longus?

A

-extension and abduction of the hand at the wrist

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30
Q

What is the proximal attachment of the extensor carpi radialis brevis?

A

-lateral epicondyle of humerus

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31
Q

What is the distal attachement of the extensor carpi radialis brevis?

A

-dorsal base of third metacarpal

32
Q

What innervates the extensor carpi radialis brevis?

A

-deep branch of radial nerve

33
Q

What is the blood supply of the extensor carpi radialis brevis?

A
  • branches of the radial artery

- branches of the interosseous artery

34
Q

What are the actions of the extensor carpi radialis brevis?

A

-extension and abduction of the hand at the wrist

35
Q

What is the proximal attachment of the extensor digitorum?

A

-lateral epicondyle of the humerus

36
Q

What is the distal attachment of the extensor digitorum?

A

-extensor expansions of digits 2-5

37
Q

What innervates the extensor digitorum?

A

-posterior interosseous nerve

38
Q

What is the blood supply of the extensor digitorum?

A

-branches of the interosseous artery

39
Q

What are the actions of the extensor digitorum?

A
  • extends digits 2-5 at MCP

- somewhat extends digits 2-5 interphalageal joints

40
Q

What is the proximal attachment of the extensor digiti minimi?

A

-lateral epicondyle of the humerus

41
Q

What is the distal attachment of the extensor digiti minimi?

A

-extensor expansion of fifth digit

42
Q

What innervates the extensor digiti minimi?

A

-posterior interosseous nerve

43
Q

What is the blood supply of the extensor digiti minimi?

A

-branches of the interosseous artery

44
Q

What are the actions of the extensor digiti minimi?

A
  • extension of the fifth digit at the MCP joint

- somewhat extends the the fifth digit at the interphalangeal joint

45
Q

What is the proximal attachment of the extensor carpi ulnaris?

A

-lateral epicondyle of the humerus

46
Q

What is the distal attachment of the extensor carpi ulnaris?

A

-dorsal base of the fifth metacarpal

47
Q

What innervates the extensor carpi ulnaris?

A

-posterior interosseous nerve

48
Q

What is the blood supply of the extensor carpi ulnaris?

A
  • branches of the radial artery

- branches of the interosseous artery

49
Q

What are the actions of the extensor carpi ulnaris?

A

-extension and adduction of the hand at the wrist

50
Q

What is the proximal attachment of the pronator teres?

A
  • coronoid process of ulna (ulnar head)

- medial epicondyle and supracondylar ridge of humerus (humeral head)

51
Q

What is the distal attachment of the pronator teres?

A

-lateral middle third off the radius

52
Q

What innervates the pronator teres?

A

-median nerve

53
Q

What are the actions of the pronator teres?

A
  • pronates the forearm

- flexes the elbow

54
Q

What is the proximal attachment of the pronator quadratus?

A

-distal third of ulna

55
Q

What is the distal insertion of the pronator quadratus?

A

-distal third of the radius

56
Q

What innervates the pronator quadratus?

A

-anterior interosseous branch of median nerve

57
Q

What are the actions of the pronator quadratus?

A
  • pronation of the forearm

- assists interosseous in holding radius and ulna together

58
Q

What is the proximal attachment of the supinator?

A
  • lateral epicondyle of humerus
  • radial collateral and annular ligaments
  • ulnar crest
59
Q

What is the distal attachment of the supinator?

A

-proximal third of radius

60
Q

What innervates the supinator?

A

-deep branch of radial nerve

61
Q

What is the proximal attachment of the abductor pollicis longus?

A

-posterior proximal ulna, radius, and interosseous membrane

62
Q

What is the distal attachment of the abductor pollicis longus?

A

-base of first metacarpal

63
Q

What innervates the abductor pollicis longus?

A

-posterior interosseous nerve

64
Q

What is the blood supply of the abductor pollicis longus?

A

-posterior interosseous artery

65
Q

What are the actions of the abductor pollicis longus?

A
  • abduction of the thumb

- extension of the thumb at carpometacapal joint

66
Q

What is the proximal attachment of the extensor pollicis brevis?

A
  • posterior surface of distal third of radius

- interosseous membrane

67
Q

What is the distal attachment of the extensor pollicis brevis?

A

-dorsum of the proximal phalanx of thumb

68
Q

What innervates the extensor pollicis brevis?

A

-posterior interosseous nerve

69
Q

What is the blood supply the extensor pollicis brevis?

A

-posterior interosseous artery

70
Q

What are the actions of the extensor pollicis brevis?

A
  • extension of proximal phalanx of the thumb at metacarpophalangeal joint
  • extension of thumb at carpometacarpal joint
71
Q

What is the proximal attachment of the extensor pollicis longus?

A
  • posterior middle third of ulna

- interosseous membrane

72
Q

What is the distal attachment of the extensor pollicis longus?

A

-dorsal base of distal phalanx of thumb

73
Q

What innervates the extensor pollicis longus?

A

-posterior interosseous nerve

74
Q

What is the blood supply of the extensor pollicis longus?

A
  • posterior interosseous artery

- perforating branch of anterior interosseous artery

75
Q

What are the actions of the extensor pollicis longus?

A
  • extension of distal phalanx of the thumb at interphalangeal joint
  • extension of wrist at metacarpophalangeal and carpometacarpal joints

(J) Muscles (4 decks)

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