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Musculoskeletal Anatomy > Posterior Forearm > Flashcards

Posterior Forearm Flashcards

1
Q

Triceps brachii origin (long head)

A

Infraglenoid tubercle

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2
Q

Triceps brachii origin (medial head)

A

Posterior humerus medial to radial groove

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3
Q

Triceps brachii origin (lateral head)

A

Posterior humerus lateral to radial groove

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4
Q

Triceps brachii insertion

A

Proximal olecranon

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5
Q

Triceps brachii action (all heads)

A

Elbow extension

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6
Q

Triceps brachii action (long head)

A

Least active head
Weak adductor and extensor of the shoulder
Helps to resist glenohumeral dislocation

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7
Q

Triceps brachii action (lateral head)

A

Strongest head
Primarily active against resistance (elbow extension)

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8
Q

Triceps brachii action (medial head)

A

Always active
Elbow extension

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9
Q

Anconeus origin

A

Lateral epicondyle

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10
Q

Anconeus insertion

A

Lateral olecranon and posterior ulna

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11
Q

Anconeus actions

A

Assist in extension, elbow stabilization

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12
Q

Triceps brachii innervation

A

Radial nerve

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13
Q

Anconeus innervation

A

Radial nerve

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14
Q

Lateral border of the quadrangular space

A

Surgical neck of humerus

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15
Q

Medial border of the quadrangular space

A

Long head of triceps brachii

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16
Q

Superior border of the quadrangular space

A

Teres minor

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17
Q

Inferior border of the quadrangular space

A

Teres major

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18
Q

Contents of the quadrangular space

A

Axillary nerve and posterior circumflex humeral artery

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19
Q

Lateral border of the triangular space

A

Long head of triceps brachii

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20
Q

Superior border of the triangular space

A

Teres minor

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21
Q

Inferior border of the triangular space

A

Teres major

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22
Q

Lateral border of the triangular interval

A

Humeral shaft

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23
Q

Medial border of the triangular interval

A

Long head of triceps brachii

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24
Q

Superior border of the triangular interval

A

Teres major

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25
Q

Contents of the triangular space

A

Circumflex scapular artery

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26
Q

Contents of the triangular interval

A

Radial nerve and the profundus brachii artery

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27
Q

Origin of brachioradialis

A

Lateral supracondylar ridge

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28
Q

Insertion of brachioradialis

A

Styloid process of radius

29
Q

Innervation of brachioradialis

A

Radial nerve

30
Q

Action of brachioradialis

A

Elbow flexion

31
Q

Extensor carpi radialis longus origin

A

Lateral supracondylar ridge

32
Q

Extensor carpi radialis longus insertion

A

Base of MCII

33
Q

Extensor carpi radialis longus innervation

A

Radial nerve

34
Q

Extensor carpi radialis longus action

A

Wrist extension and abduction

35
Q

Extensor carpi radialis brevis origin

A

Lateral epicondyle

36
Q

Extensor carpi radialis brevis insertion

A

Base of MC III

37
Q

Extensor carpi radialis brevis innervation

A

Deep branch of radial

38
Q

Extensor carpi radialis brevis action

A

Extension and abduction of the wrist

39
Q

Extensor carpi ulnaris origin

A

Lateral epicondyle and posterior ulna

40
Q

Extensor carpi ulnaris insertion

A

Base of MC V

41
Q

Extensor carpi ulnaris innervation

A

Deep branch of radial

42
Q

Extensor carpi ulnaris action

A

Extension and adduction of the wrist

43
Q

Extensor digitorum origin

A

Lateral epicondyle

44
Q

Extensor digitorum insertion

A

Extensor expansions of digits 2-5

45
Q

Extensor digitorum innervation

A

Deep branch of radial

46
Q

Extensor digitorum action

A

Extension of MCP joints of digits 2-5

47
Q

Extensor digiti minimi origin

A

Lateral epicondyle

48
Q

Extensor digiti minimi insertion

A

Extensor expansion of digit 5

49
Q

Extensor digiti minimi innervation

A

Deep branch of radial

50
Q

Extensor digiti minimi action

A

Extension of MCP joint of digit 5

51
Q

Supinator origin

A

Lateral epicondyle, posterior ulna

52
Q

Supinator insertion

A

Proximal 1/3 of radius

53
Q

Supinator innervation

A

Deep branch of radial

54
Q

Supinator action

A

Supination

55
Q

Abductor pollicis longus origin

A

Posterior ulna, radius, interosseous membrane

56
Q

Abductor pollicis longus insertion

A

Base of MCI

57
Q

Abductor pollicis longus innervation

A

Posterior interosseous

58
Q

Abductor pollicis longus action

A

Abduction of pollex

59
Q

Extensor indicis origin

A

Posterior ulna, interosseous membrane

60
Q

Extensor indicis innervation

A

Posterior interosseous

61
Q

Extensor indicis action

A

Extension of MCP joint of digit 2

62
Q

Extensor pollicis longus origin

A

Posterior ulna and interosseous membrane

63
Q

Extensor pollicis longus insertion

A

Base of distal phalanx of pollex

64
Q

Extensor pollicis longus innervation

A

Posterior interosseous

65
Q

Extensor pollicis longus action

A

Extension of IP joint of pollex

66
Q

Extensor pollicis brevis origin

A

Posterior radius and interosseous membrane

67
Q

Extensor pollicis brevis insertion

A

Base of proximal distal phalanx of pollex

68
Q

Extensor pollicis brevis innervation

A

Posterior interosseous

Musculoskeletal Anatomy (11 decks)

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