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Anatomy > 9: Cubital fossa and musculo-neuro-vascular systems of the posterior forearm > Flashcards

9: Cubital fossa and musculo-neuro-vascular systems of the posterior forearm Flashcards

1
Q

Muscles responsible for elbow flexion

A

Brachialis
Biceps brachii
Brachioradialis
Pronater Teres

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2
Q

Muscles responsible for wrist flexion

A

Flexor carpi ulnaris
Flexor carpi radialis
Palmaris longus
Flexor digitorum superficialis
Flexor digitorum profundus

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3
Q

Muscles responsible for radial deviation

A

Flexor carpi radialis

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4
Q

Muscles responsible for ulnar deviation

A

Flexor carpi ulnaris

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5
Q

Superior boundary of cubital fossa

A

Line between medial and lateral epicondyles

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6
Q

Medial boundary of cubital fossa

A

Pronator teres

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7
Q

Lateral boundary of cubital fossa

A

Brachioradialis

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8
Q

Roof of cubital fossa

A

Fascia of forearm and bicipital aponeurosis

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9
Q

Floor of cubical fossa

A

Biceps tendon
Brachialis
Supinator

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10
Q

Contents of cubital fossa (from lateral to medial)

A

Really need booze to be at my nicest
Radial nerve
Biceps tendon
Brachial artery
Median nerve

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11
Q

Muscles in posterior compartment of forearm

A

Superficial
Brachioradialis
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor carpi ulnaris
Extensor digitorum
Extensor digit minimi

Deep
Supinator
Abductor Pollicis longus
Extensor pollicis brevis
Extensor pollicis longus
Extensor Indicis

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12
Q

Posterior forearm muscles supplied by the… except (2)

A

Posterior Interosseus branch of the radial nerve
Brachioradialis (supplied by radial nerve directly)
Extensor carpi radialis longus (supplied by radial nerve directly)

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13
Q

Superficial muscles of posterior compartment are attached to… Through the..

A

The lateral epicondyle
Common extensor tendon

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14
Q

Origin of brachioradialis

A

Proximal 2/3 of lateral supracondular ridge

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15
Q

Insertion of brachioradialis

A

Lateral surface of distal end of radius and styloid process

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16
Q

Innervation of brachioradialis

A

Radial nerve directly

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17
Q

Actions of brachioradialis

A

When forearm is pronated, BR supinates forearm and flexes elbow
When forearm is supinated, BR pronates forearm

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18
Q

Origin of extensor carpi radialis longus

A

Lateral supracondylar ridge

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19
Q

Insertion of extensor carpi radialis longus

A

Dorsal aspect of base of second metacarpal

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20
Q

Innervation of extensor carpi radialis longus

A

Radial nerve directly

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21
Q

Actions of extensor carpi radialis longus

A

Extends and abducts wrist at radiocarbon joint

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22
Q

Origin of extensor carpi radialis brevis

A

Lateral epicondyle

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23
Q

Insertion of extensor carpi radialis brevis

A

Dorsal aspect of base of 3rd metacarpal

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24
Q

Innervation of extensor carpi radialis brevis

A

Posterior interosseous branch of radial nerve

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25
Q

Actions of extensor carpi radialis brevis

A

Extends + abducts wrist at radiocarpal joint

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26
Q

Origin of extensor carpi ulnaris

A

Lateral epicondyle

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27
Q

Insertion of extensor carpi ulnaris

A

Dorsal aspect of base of 5th metacarpal

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28
Q

Innervation of extensor carpi ulnaris

A

Posterior interosseus branch of radial nerve

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29
Q

Actions of extensor carpi ulnaris

A

Extends +adducts wrist at radiocarpal joint

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30
Q

Origin of extensor digitorum

A

common extensor origin

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31
Q

Insertion of extensor digitorum

A

Dorsal aspect of base of middle and distal
Phalanges 2-5

32
Q

Innervation of extensor digitorum

A

Posterior interosseus branch of radial nerve

33
Q

Actions of extensor digitorum

A

Extends digits 2-5 at proximal and distal IP joints

34
Q

Insertions of extensor digitorum

A
  1. Median band (median slip inserts into the dorsal aspect of the middle phalanx)
  2. Outer bands (the 2 outer slips reunite on the dorsal aspect of the distal phalanx)
35
Q

The proximal extensor expansion insert….

A

Into the underlying MCP joint capsule

36
Q

Origin of extensor digiti minimi

A

Common extensor origin

37
Q

Insertion of extensor digiti minimi

A

Dorsal aspect of digit 5, base of middle and distal phalanx

38
Q

Innervation of extensor digiti minimi

A

Posterior interosseous branch of radial nerve

39
Q

Actions of extensor digiti minimi

A

Extends little finger at distal and proximal interphalangeal joints

40
Q

Origin of supinator

A

Deep head: supinator crest of ulna
Superficial head: common extensor tendon

41
Q

Insertion of supinator

A

Anterolateral surface of proximal 1/3 of radius

42
Q

Innervation of supinator

A

Posterior interosseous branch of radial nerve

43
Q

Actions of supinator

A

Supinates forearm

44
Q

Origin of abductor Pollicis longus

A

Posterior ulna, interosseous membrane

45
Q

Insertion of abductor pollicis longus

A

Lateral aspect of base of 1st metacarpal

46
Q

Innervation of abductor Pollicis longus

A

Posterior interosseous branch of radial nerve

47
Q

Actions of abductor pollicis longus

A

Extends and abducts thumb at CMC joint

48
Q

Origin of extensor pollicis longs

A

Posterior surface of middle third ulna and interosseous membrane

49
Q

Insertion of extensor Pollicis longus

A

Dorsal aspect of base of thumb + distal phalanx

50
Q

Innervation of extensor pollicis longus

A

Posterior interosseous branch of radial nerve

51
Q

Actions of extensor pollicis longus

A

Extends proximal and distal phalanges of thumb
Extends first MC joint

52
Q

Origin of extensor pollicis brevis

A

Posterior surface of distal radius and interosseus membrane

53
Q

Insertion of extensor pollicis brevis

A

Dorsal aspect of base of proximal phalanx of thumb

54
Q

Innervation of extensor pollicis brevis

A

Posterior interosseous branch of radial nerve

55
Q

Actions of extensor pollicis brevis

A

Extends proximal phalanx of thumb
Extends first MC joint

56
Q

Origin of extensor indicis

A

Posterior surface of ulna and interosseous membrane

57
Q

Insertion of extensor indicis

A

Dorsal aspect of index finger

58
Q

Innervation of extensor indicis

A

Posterior interosseous branch of radial nerve

59
Q

Actions of extensor indicis

A

Extends index finger

60
Q

As brachial artery enters forearm deep to…. it bifurcates……

A

bicipital aponeurosis
Radial + ulnar artery

61
Q

Superior and inferior ulnar collateral arteries anastomose with….

A

Ulnar recurrent arteries

62
Q

Radial collateral artery anastomoses with…

A

Radial recurrent arteries

63
Q

Common interosseous artery divides into

A

Anterior branch
Posterior branch

64
Q

Posterior interosseus artery anastomoses with…

A

The middle collateral branch of the profunda brachii
Together these supply the middle posterior part of the elbow

65
Q

Both anterior and posterior branches of the interosseous arteries supply….

A

The proximal radioulnar joint

66
Q

Radial artery arises in…

A

Cubical fossa from bifurcation of brachial artery

67
Q

Course of ulnar artery

A

Courses distally from its origin in the cubital fossa along the medial side of the forearm
Runs between flexor carpi ulnaris and flexor digitorum profundus

68
Q

Ulnar artery and its branches supply

A

Medial part of the forearm

69
Q

Deep veins

A

Radial
Ulnar
Posterior interosseous
Anterior interosseous

70
Q

Superficial veins

A

Cephalic
Basilic
Median antebrachial

71
Q

Forearm nerves (3)

A

Median nerve + anterior interosseous branch
Ulnar nerve
Radial nerve + posterior interosseous branch

72
Q

Course of median nerve

A

Passes over ulnar artery and continues distally between flexor digitorum superficialis and profundus
Innervates most of the muscles in anterior compartment
Passes distally between flexor digitorum superficialis and profundus and exits forearm through carpal tunnel at wrist

73
Q

Course of anterior interosseous nerve

A

Runs distally along the anterior part of interosseous membrane and innervates the anterior compartment muscles

74
Q

Course of ulnar nerve

A

Descends posterior to medial epicondyle, enters forearm between 2 heads of flexor carpi ulnaris, descends distally between flexor digitorum profundus and flexor carpi ulnaris and medial to ulnar artery.
Ulnar nerve enters the hand superficial to flexor retinaculum and lateral to carpi ulnaris tendon

75
Q

Branches of radial nerve

A

Superficial and deep

76
Q

Posterior interosseous nerve course

A

Passes between two heads of supinator and courses distally in the posterior forearm compartment
Supplies most muscles of extensor compartment

Anatomy (17 decks)

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