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PCOM Anatomy > Forearm Muscles > Flashcards

Forearm Muscles Flashcards

1
Q

Flexor Digitorum Superficialis proximal attachment?

A
  1. Humeral-Ulnar Head: Medial Epicondyle and coronoid process of ulna
  2. Radial Head: superior half of anterior radius (Oblique Line of Radius)
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2
Q

Flexor Digitorum Superficialis distal attachment?

A

Splits to both sides of the base of each Middle Phalanx of the 4 digits

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3
Q

Flexor Digitorum Superficialis function?

A
  1. Flexes the Proximal and Middle phalanges of medial 4 digits
  2. Flexes the hand at the Wrist if Fingers are Extended
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4
Q

Flexor Digitorum Superficialis Nerve?

A

Median

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5
Q

Flexor Digitorum Profundus proximal?

A

Anterior and Medial Surface of Proximal 3/4 Ulna and interosseous membrane

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6
Q

Flexor Digitorum Profundus distal?

A

Distal Phalanx of Medial 4 Digits (through FDS tunnel)

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7
Q

Flexor Digitorum Profundus function?

A
  1. Flexes the Distal phalanges of medial 4 digits

2. assists with Flexion the Wrist if Fingers are Extended

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8
Q

Flexor Digitorum Profundus Nerve?

A

Digits 2 and 3: Median

Digits 4 and 5: Ulnar

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9
Q

Flexor Pollicis Longus proximal?

A

Middle of Anterior Radius and Interosseus Membrane

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10
Q

Flexor Pollicis Longus distal?

A

Palmar Base of the Distal Phalanx of Thumb

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11
Q

Flexor Pollicis Longus function?

A
  1. Flexes the Distal Phalanx of Thumb
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12
Q

Flexor Pollicis Longus Nerve?

A

Median

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13
Q

Pronator Quadratus proximal?

A

Distal 1/4 Anteromedial Ulna

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14
Q

Pronator Quadratus distal?

A

Distal 1/4 Anterolateral Radius

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15
Q

Pronator Quadrates function?

A

Pronates the Forearm and Hand

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16
Q

Pronator Quadrates Nerve?

A

Median

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17
Q

Brachioradialis proximal?

A

proximal 2/3 of Lateral Supracondylar Ridge of Humerus

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18
Q

Brachioradialis distal?

A

Lateral Side of Distal 1/3 of Radius

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19
Q

Brachioradialis function?

A
  1. weakly Flexes the forearm when forearm is midpronated
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20
Q

Brachioradialis Nerve?

A

Radial

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21
Q

Extensor Carpi Radialis Longus proximal?

A

distal 1/3 of Lateral Supracondylar Ridge (below Brachioradialis)

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22
Q

Extensor Carpi Radialis Longus distal?

A

Dorsal Base of 2nd Metacarpal and a slip to 3rd metacarpal

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23
Q

Extensor Carpi Radialis Longus function?

A
  • extends and abducts hand at wrist

- radial deviation

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24
Q

Extensor Carpi Radialis Longus Nerve?

A

Radial

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25
Q

Extensor Carpi Radialis Brevis proximal?

A

Lateral Epicondyle of humerus

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26
Q

Extensor Carpi Radialis Brevis distal?

A

Dorsal Base of 3rd Metacarpal with a slip to 2nd metacarpal

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27
Q

Extensor Carpi Radialis Brevis function?

A

Extends and abducts hand at wrist

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28
Q

Extensor Carpi Radialis Brevis Nerve?

A

Radial

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29
Q

Extensor Carpi Ulnaris proximal?

A

Lateral Epicondyle of humerus and posterior border of ulna

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30
Q

Extensor Carpi Ulnaris distal?

A

Dorsal Base of the 5th Metacarpal

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31
Q

Extensor Carpi Ulnaris function?

A
  • extends and adducts hand at wrist

- ulnar deviation

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32
Q

Extensor Carpi Ulnaris Nerve?

A

Radial

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33
Q

Extensor Digitorum proximal?

A

Lateral Epicondyle of humerus

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34
Q

Extensor Digitorum distal?

A

extensor expansions of medial 4 digits

35
Q

Extensor Digitorum function?

A
  1. Extends 4 Medial Digits
  2. assists Extension of Wrist (if fingers are flexed)
  3. extends 5th digit
36
Q

Extensor Digitorum Nerve?

37
Q

Extensor Digiti Minimi proximal?

A

Lateral Epicondyle of humerus

38
Q

Extensor Digiti Minimi distal?

A

extensor expansion of 5th digit

39
Q

Extensor Digiti Minimi function?

A

Extends the 5th Digit

40
Q

Extensor Digiti Minimi Nerve?

41
Q

Extensor Indicis proximal?

A
  1. Posterior Surface of Ulna

2. Interosseus Membrane

42
Q

Extensor Indicis distal?

A

extensor expansion of 2nd digit

43
Q

Extensor Indicis function?

A
  1. Extends 2nd Digit

2. Assists to Extend the hand at the Wrist

44
Q

Extensor Indicis Nerve?

45
Q

Supinator proximal?

A
  1. Lateral Epicondyle of humerus

2. Supinator Crest of ulna

46
Q

Supinator distal?

A

Proximal 1/3, Anterolateral, posterior Surface of Radius

47
Q

Supinator function?

A

Supinates the Forearm

48
Q

Supinator Nerve?

49
Q

Extensor Pollicis Longus proximal?

A
  1. Posterior Surface of middle 1/3 of Ulna

2. Interosseus Membrane

50
Q

Extensor Pollicis Longus distal?

A

Dorsal and Distal Phalanx of Thumb

51
Q

Extensor Pollicis Longus function?

A
  1. Extends Distal Phalanx of Thumb at IP nd MCP joints
52
Q

Extensor Pollicis Longus Nerve?

53
Q

Extensor Pollicis Brevis proximal?

A
  1. Posterior Surface of Radius (below Abductor Pollicis Longus)
  2. Interosseus Membrane
54
Q

Extensor Pollicis Brevis distal?

A

Dorsal Base of Proximal Phalanx of Thumb

55
Q

Extensor Pollicis Brevis function?

A
  1. Extends Proximal Phalanx of thumb at carpometacarpal joint
56
Q

Extensor Pollicis Brevis Nerve?

57
Q

Abductor Pollicis Longus proximal?

A
  1. Posterior Surface of Ulna and Radius

2. Interosseus Membrane

58
Q

Abductor Pollicis Longus distal?

A

Base of 1st Metacarpal

59
Q

Abductor Pollicis Longus function?

A

Abducts and extends thumb at carpometacarpal joint

60
Q

Abductor Pollicis Longus Nerve?

61
Q

Pronator Teres attachments?

A
  1. proximal:
    - medial epicondyle of humerus
    - coronoid process of ulna
  2. distal:
    - midway along lateral surface of radius
62
Q

Pronator Teres innervation?

A

median nerve

63
Q

Pronator Teres function?

A
  • pronates forearm

- assists with elbow flexion

64
Q

Pronator Teres nerve?

65
Q

Flexor carpi radialis attachments?

A
  1. proximal:
    - medial epicondyle of humerus
  2. distal:
    - base of 2nd metacarpal
66
Q

flexor carpi radialis function?

A
  • flexes and abducts hand at wrist

- radial deviation

67
Q

flexor carpi radialis nerve?

68
Q

palmaris longus attachments?

A
  1. proximal:
    - medial epicondyle of humerus
  2. distal:
    - distal half of flexor retinaculum and palmar aponeurosis
69
Q

palmaris longus nerve?

70
Q

palmaris longus function?

A

-flexes hand at wrist and tenses palmar aponeurosis

71
Q

flexor carpi ulnaris attachments?

A
  1. proximal:
    - medial epicondyle of humerus
    - olecranon and posterior border of ulna
  2. distal:
    - pisiform
    - hook of hamate
    - base of 5th metacarpal
72
Q

flexor carpi ulnaris function?

A
  • flexes and adducts hand at wrist

- ulnar deviation

73
Q

flexor carpi ulnaris nerve?

74
Q

What muscles make up the anterior compartment of arm? functions? innervation?

A
  1. muscles:
    - coracobrachialis
    - biceps brachii
    - brachialis
  2. innervated by musculocutaneous
  3. anterior compartment are flexors
75
Q

what muscles make up the posterior compartment of the arm? functions? innervation?

A
  1. muscles:
    - triceps brachii
  2. innervated by radial nerve
  3. posterior compartment are extensors
76
Q

what innervates the anterior compartment of the forearm?

A
  1. median nerve

2. ulnar nerve

77
Q

what ligament makes up the anterior side of the elbow joint capsule?

A
  • annular ligament

- medial and lateral collateral ligaments make up the sides of the capsule

78
Q

What are the 4 superficial muscles, 1 intermediate muscle, and 3 deep muscles of the anterior compartment (also pronators) of the forearm?

A
  1. superficial:
    - pronator teres
    - flexor carpi radialis
    - palmaris longus
    - flexor carpi ulnaris
  2. intermediate:
    - flexor digitorum superficialis
  3. deep:
    - flexor pollicis longus
    - flexor digitorum profundus
    - pronator quadratus
79
Q

what 5 muscles attach proximally on the medial epicondyle of the humerus?

A
  1. pronator teres
  2. flexor carpi radialis
  3. palmaris longus
  4. flexor carpi ulnaris
  5. flexor digitorum superficialis
80
Q

What are the 7 superficial forearm extensors?

A
  1. Brachioradialis
  2. extensor carpi radialis longus
  3. extensor carpi radialis brevis
  4. extensor digitorum
  5. extensor digiti minimi
  6. extensor carpi ulnaris
  7. anconeus
81
Q

What are the 4 deep forearm extensors?

A
  1. abductor pollicis longus
  2. extensor pollicis brevis
  3. extensor pollicis longus
  4. extensor indicis
    - supinator is a deep forearm muscle, supinates
82
Q

What structures go through the cubital fossa?

A
  • median nerve
  • radial nerve (deep and superficial)
  • brachial artery (branches into radial and ulnar arteries)
83
Q

what does the ulnar artery branch into?

A
  • common interosseous artery

- then it splits into anterior and posterior interosseous arteries

PCOM Anatomy (6 decks)

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