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MSS - MSK Exam 2 > Organization of the Forearm > Flashcards

Organization of the Forearm Flashcards

1
Q

muscles of superficial flexor forearm

A

pronator teres
flexor carpi radialis
palmaris longus
flexor carpi ulnaris

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2
Q

attachments of pronator teres?

A

origin:
humeral head - medial epicondyle by common flexor tendon
ulnar head - coronoid process of ulna

insertion:
lateral surface, middle portion of shaft of radius

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3
Q

action of pronator teres

A

pronates and slightly flexes forearm

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4
Q

innervation of pronator teres

A

median nerve

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5
Q

attachments of flexor carpi radialis?

A

origin:
medial epicondyle of humerus by common flexor tendon

insertion:
base of 2nd and 3rd metacarpal

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6
Q

action of flexor carpi radialis?

A

flexes wrist and abducts band

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7
Q

innervation of flexor capri radialis?

A

median nerve

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8
Q

attachments of palmaris longus?

A

origin:
medial epicondyle of humerus by common flexor tendon

insertion:
palmar aponeurosis

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9
Q

action of palmaris longus?

A

flexes wrist

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10
Q

innervation of palmaris longus?

A

median nerve

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11
Q

attachments of flexor carpi ulnaris?

A

origin:
humeral head - medial epicondyle of humerus
ulnar head - medial border of olecranon process and proximal dorsal surface of ulna

insertion:
pisiform, hamulus of hamate, base of 5th metacarpal

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12
Q

action of flexor carpi ulnaris?

A

flexes wrist, adducts hand

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13
Q

innervation of flexor carpi ulnaris

A

ulnar nerve

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14
Q

muscles of intermediate layer flexor compartment?

A

flexor digitorum superficialis

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15
Q

formation of carpal tunnel

A

flexor retinaculum deep fascia attached to trapezium, scaphoid, pisiform, and hamulus of hamate

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16
Q

contents of carpal tunnel?

A

median nerve

tendons of intermediate and deep flexor muscles

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17
Q

attachments of flexor digitorum superficilais

A

origin:
humeroulnar head - medial epicondyle of humerus and coronoid process of ulna
radial head - proximal one-half, anterior border radius

insertion:
palmar aspect of middle phalanges, digit 2-5

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18
Q

action of flexor digitorum superficialis

A

flexes proximal IP joints, assist in flexion of MP joints, wrist, forearm

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19
Q

innervation of flexor digitorum superficialis

A

median nerve

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20
Q

muscles of deep layer flexor compartment

A

flexor digitorum profundus and flexor pollicis longus

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21
Q

attachments of flexor digitorum profundus

A

origin:
proximal 2/3 of medial anterior surface of ulna adjacent interosseous membrane

insertion:
palmar surface of distal phalanges, digit 2-5

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22
Q

action of flexor digitorum profundus

A

flexion of distal IP joints, assist flexion of proximal IP joints, MP and wrist joints

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23
Q

innervation of flexor digitorum profundus

A 
lateral portion (4 5) - median nerve
medial portion(2 3) - ulnar nerve
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24
Q

attachments of flexor pollicis longus

A

origin:
ulna (near medial border of coronoid process), anterior surface of radius (between oblique line and pronator quadratus), adjacent interosseous membrane

insertion:
palmar surface, base of distal phalanx of thumb

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25
Q

action of flexor pollicis longus?

A

flexes thumb

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26
Q

innervation of flexor pollicis longus?

A

median nerve

27
Q

attachments of pronator quadratus

A

origin:
distal one fourth of anterior surface of ulna

insertion:
dostal one fourth of anterior surface of radius

28
Q

action of pronator quadratus

29
Q

innervation of pronator quadratus

A

median nerve

30
Q

muscles of superficial extensor compartment?

A 
extensor carpi radialis longus
extensor carpi radialis brevis
extensor digitorum
extensor digiti minimi
extensor carpi ulnaris
31
Q

attachments of extensor carpi radialis longus?

A

origin:
lateral supracondylar ridge of humerus

insertion:
dorsal surface, base of second metacarpal

32
Q

action of extensor carpi radialis longus?

A

extends and abducts hand

33
Q

innervation of extensor carpi radialis longus?

A

radial nerve

34
Q

attachment of extensor carpi radialis brevis?

A

origin:
lateral epicondyle of humerus

insertion:
dorsal surface, base of third metacarpal

35
Q

action of extensor carpi radialis brevis?

A

extend and assist in abduction of hand

36
Q

innervation of extensor carpi radialis brevis?

A

radial nerve

37
Q

attachments of extensor digitorum?

A

origin:
lateral epicondyle of humerus

insertion:
dorsal surface of middle and distal phalanges of digits 2-5

38
Q

action of extensor digitorum

A

extend digits 2-5 and assist in extension of hand

39
Q

innervation of extensor digitorum

A

radial nerve

40
Q

intertendinous tendons

A

unite tendons of extensor digitorum as they cross dorsum of the hand

41
Q

extensor expansion

A

spans dorsum of proximal, middle, and distal phalanges

distributes force

site of attachment for lumbricals and interossei

42
Q

attachment of extensor digiti minimi

A

origin:
lateral epicondyle of humerus in common with extensor digitorum

insertion:
dorsal surface, proximal phalanx of fifth digit (into extensor expansion)

43
Q

action of extensor digiti minimi

A

extension of fifth digit

44
Q

innervation of extnesor digit minimi

A

radial nerve

45
Q

attachments of extensor carpi ulnaris

A

origin:
lateral epicondyle of humerus and posterior border of ulna

insertion:
base of fifth metacarpal

46
Q

action of extensor carpi ulnaris

A

extend and adducts hand

47
Q

innervation of extensor carpi ulnaris

A

radial nerve

48
Q

muscle of deep layer of extensor forearm compartment

A 
abductor pollicis longus
extensor pollicis brevis
extensor pollicis longus
extensor indicis
supinator
49
Q

attachments of abductor pollicis longus?

A

origin:
middle third posterior surface ulna, radius, and interosseous membrane

insertion:
dorsolateral surface, base of 1st metacarpal

50
Q

action of abductor pollicis longus

A

abducts of the thumb and wrist, assists in extension of thumb

51
Q

innervation of abductor pollicis longus

A

radial nerve

52
Q

attachments of extensor pollicis brevis

A

origin:
distal third posterior surface of radius and interosseous membrane

insertion:
dorsal surface, base of proximal phalanx of thumb

53
Q

action of extensor pollicis brevis

A

extends proximal phalanx of thumb and first metacarpal

54
Q

innervation of extensor pollicis brevis

A

radial nerve

55
Q

attachments of extensor pollicis longus

A

origin:
middle third posterior surface of ulna and interosseous membrane

insertion:
dorsal surface, base of distal phalanx of thumb

56
Q

action of extensor pollicis longus?

A

extends thumb (IP and MP joints)

57
Q

innervation of extensor pollicis longus?

A

radial nerve

58
Q

attachments of extensor indicis?

A

origin:
distal third, posterior surface of ulna and interosseous membrane

insertion:
dorsum, base of distal phalanx of 2nd digit with extensor expansion

59
Q

action of extensor indicis?

A

extends index finger

60
Q

innervation of extensor indicis?

A

radial nerve

61
Q

extensor retinaculum

A

encloses 9 muscles of extensor forearm

62
Q

attachments of supinator?

A

origin:
lateral epicondyle of humerus, radial collateral ligament of elbow joint, annular ligament of radial head, supinator fossa of ulna and associated crest

insertion:
lateral and anterior surface of proximal third of radius

63
Q

action of supinator?

A

supinates hand

64
Q

innervation of supinator?

A

radial nerve

MSS - MSK Exam 2 (13 decks)

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