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forearm > Forearms > Flashcards

Forearms Flashcards

0
Q

Brachioradialis- distal attachment

A

Lateral surface of distal end of radius proximal of styled process

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1
Q

Brachioradialis- origin

A

Proximal two thirds of lateral supraepicondylar ridge of humerus

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2
Q

Brachioradialis innervation

A

Radial nerve C-5 C6 C7

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3
Q

Brachioradialis action

A

Relatively weak flexion of elbow joint, maximal when forearm is in mid pronated position

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4
Q

Extensor carpi radialis longus proximal attachment

A

Lateral Supra-epicondylar ridge of humerus

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5
Q

Extensor carpi radialis longus distal attachment

A

Dorsal aspect of base of second metacarpal

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6
Q

Extensor carpi radialis longus-innervation

A

Radial nerve C6 and C7

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7
Q

Extensor carpi radialis longus action

A

Extend and ABducts; extensor carpi radialis brevis active during fist clenching

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8
Q

Extensor carpi radialis brevis proximal attachment

A

Lateral epicondyles of humerus

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9
Q

Extensor carpi radialis brevis distal attachment

A

Dorsal aspect of base of the third metacarpal

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10
Q

Extensor carpi radialis brevis innervation

A

Dorsal branch of radial nerve (C7 C8)

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11
Q

Extensor carpi radialis brevis action

A

Extend and aBducts wrist joint; extensor carpi radialis brevis active during fist clenching

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12
Q

Extensor digitorum proximal attachment

A

Lateral epicondyle of humerus

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13
Q

Extensor digitorum distal attachment

A

Extensor expansions of medial four fingers

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14
Q

Extensor digitorum action

A

Extend wrist joint, extend medial four fingers primarily metacarpophalangeal joints, secondarily at interphalangeal joints

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15
Q

Extensor digiti minimi- proximal attachment

A

Lateral epicondyles of humerus

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16
Q

Extensor digiti minimi distal attachment

A

Extensor expansion of fifth finger

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17
Q

Extensor digiti minimi innervation

A

Posterior interosseous nerve (c7, c8), continuation of deep branch of radial nerve

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18
Q

Extensor digiti minimi action

A

Extends wrist joint, extends fifth finger primarily at metacarpophalangeal joint, secondarily at interphalangeal joint

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19
Q

Extensor carpi ulnaris proximal attachment

A

Lateral epicondyles of humerus; posterior border of ulna via A shared aponeurosis

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20
Q

Extensor carpi ulnaris distal attachment

A

Dorsal aspect of base of the fifth metacarpal

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21
Q

Extensor carpi ulnaris action

A

Extends and ADDucts wrist joint (also active during fist clenching)

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22
Q

Supinator proximal attachment

A

Lateral epicondyles of humerus, radial collateral and anular ligaments, supinator fossa, crest of ulna

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23
Q

Supinator distal attachment

A

Lateral, posterior, and anterior surfaces of proximal third of radius

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24
Q

Supinator innervation

A

Deep branch of radial nerve C7 c8

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25
Q

Supinator action

A

Supinates forearm; rotates radius to turn palm anteriorly or superiorly (if elbow is flexed)

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26
Q

Abductor pollicis longus-proximal attachment

A

Posterior surface of proximal halves of ulna, radius, and interosseous membrane

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27
Q

Abducts pollicis longus- distal attachment

A

Base of 1st metacarpal

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28
Q

Abducts pollicis longus- innervation

A

Posterior interosseous nerve ( c7, c8), continuation of deep branch of radial nerve

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29
Q

Abducts pollicis longus-action

A

Extends wrist joint, abducts thumb and extends it at carpometacarpal joint

30
Q

Extensor pollicis longus- proximal attachment

A

Posterior surface of middle third of ulna and interosseous membrane

31
Q

Extensor pollicis longus- distal attachment

A

Dorsal aspect of base of distal phalanx of thumb

32
Q

Extensor pollicis longus- innervation

A

Posterior interosseous nerve ( c7, c8), continuation of deep branch of radial nerve

33
Q

Extensor pollicis longus action

A

Extends wrist joint; extends distal phalanx of thumb at interphalangeal joint; extends metacarpophalangeal and carpometacarpal joints

34
Q

Extensor pollicis brevis proximal attachment

A

Posterior surface of distal third of radius and interosseous membrane

35
Q

Extensor pollicis brevis distal attachment

A

Dorsal aspect of base of proximal phalanx of thumb

36
Q

Extensor pollicis brevis innervation

A

Posterior interosseous nerve ( c7, c8), continuation of deep branch of radial nerve

37
Q

Extensor pollicis brevis action

A

Extends wrist joint; extends proximal phalanx of thumb at metacarpophalangeal joint; extends carpometacarpal joint

38
Q

Extensor indicis proximal attachment

A

Posterior surface of distal third of ulna and interosseous membrane

39
Q

Extensor indicis-distal attachment

A

Extensor expansion of second finger

40
Q

Extensor indicis- innervation

A

Posterior interosseous nerve ( c7, c8), continuation of deep branch of radial nerve

41
Q

Extensor indicis- action

A

Extends wrist joint; extends second finger (enabling its independent extension); helps extend hand at wrist

42
Q

Pronator teres-proximal attachment

A

Ulnar head: coronoid process of ulna

Humeral head: medial epicondyle of humerus

43
Q

Pronator teres- distal attachment

A

Middle of convexity of lateral surface of radius

44
Q

Pronator teres innervation

A

Median nerve c6, c7

45
Q

Pronator teres- action

A

Pronates and flexes forearm

46
Q

Flexor carpi radialis- proximal attachment

A

Medial epicondyle of humerus

47
Q

Flexor carpi radialis- distal attachment

A

Base of 2nd (3rd) metacarpal

48
Q

Flexor carpi radialis- innervation

A

Median nerve (c6, c7)

49
Q

Flexor carpi radialis- action

A

Flexes and aBducts hand at wrist

50
Q

Palmaris longus- proximal attachment

A

Medial epicondyle of humerus

51
Q

Palmaris longus- distal attachment

A

Distal half of flexor retinaculum, palmar aponeurosis

52
Q

Palmaris longus- innervation

A

Median nerve (c7,c8)

53
Q

Palmaris longus- action

A

Flexes hand (at wrist) and tenses palmar aperneurosis

54
Q

Flexor carpi ulnaris- proximal attachment

A

Olecranon and posterior border of ulna (via aperneurosis)

55
Q

Flexor carpi ulnaris- distal attachment

A

Pisiform, hook of hamate, 5th metacarpal

56
Q

Flexor carpi ulnaris- innervation

A

Ulnar nerve (c7,c8)

57
Q

Flexor carpi ulnaris- action

A

Flexes and aDducts hand at wrist

58
Q

Flexes digitorum superficialis-proximal attachment

A

Humero-ulnar head: medial epicondyle of humerus and coronoid process of ulna
Radial head: oblique line of radius

59
Q

Flexor digitorum superficialis- distal attachment

A

Shafts ( bodies) of middle phalanges of medial four digits

60
Q

Flexor digitorum superficialis- innervation

A

Median nerve (c7, c8, t1)

61
Q

Flexor digitorum superficialis- action

A

Flexes wrist joint
Flexes proximal interphalangeal joints of middle four digits; acting more strongly, it also flexes proximal phalanges at metacarpalangeal joint

62
Q

Flexor digitorum profundus-proximal attachment

A

Proximal three quarters of medial and anterior surfaces of ulna and interosseous membrane

63
Q

Flexor digitorum profundus- distal attachment

A

Bases of distal phalanges of 2nd, 3rd, 4th, 5th digits

64
Q

Flexor digitorum profundus- innervation

A 
Lateral part ( to digits 2&3): median nerve (c8,t1) ( anterior interosseous branch)
Medial part (to digits 4&5): ulnar nerve (c8,t1)
65
Q

Flexor digitorum profundus-action

A

Flexes wrist joint

Flexes distal interphalangeal joints of digits 2,3,4,5; assists with wrist flexion

66
Q

Flexor pollicis longus- proximal attachment

A

Anterior surface of radius and adjacent interosseous membrane

67
Q

Flexor pollicis longus- distal attachment

A

Base of distal phalanx of thumb

68
Q

Flexor pollicis longus- innervation

A

Anterior interosseous nerve, from median nerve (c8,t1)

69
Q

Flexor pollicis longus- action

A

Flexes wrist

Flexes metacarpophalangeal and interphalangeal joints of thumb

70
Q

Pronator quadratus- proximal attachment

A

Distal quarter of anterior surface of ulna

71
Q

Pronator quadratus- distal attachment

A

Distal quarter of anterior surface of radius

72
Q

Pronator quadratus-innervation

A

Anterior interosseous nerve, from median nerve (c8,t1)

73
Q

Pronator quadratus- action

A

Pronate a forearm; deep fibers bind radius and ulna together

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