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Anatomy > Elbow and Forearm > Flashcards

Elbow and Forearm Flashcards

1
Q

what is the proximal origin of the brachioradialis?

A

lateral supracondylar ridge of humerus (above carpi radialis longus)

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2
Q

what is the distal insertion of the brachioradialis?

A

lateral side of distal end of radius

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3
Q

what is the action of the brachioradialis?

A

weak flexion of forearm, when forearm is midpronated

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4
Q

what is the proximal origin of the extensor carpi radials longus?

A

lateral supracondylar ridge of humerus ( above the carpi radialis brevis)

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5
Q

what is the distal insertion of the extensor carpi radialis longus?

A

base of 2nd metacarpal and 3rd metacarpal

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6
Q

what muscles are innervated by the radial nerve?

A
  • brachioradialis
  • extensor carpi radialis longus and brevis
  • extensor digiti minimi
  • extensor carpi ulnaris
  • extensor indicis
  • anconeus
  • supinator
  • abductor pollicis longus
  • extensor pollicis brevis and longus
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7
Q

what is the proximal origin of the extensor carpi radialis brevis?

A

lateral epicondyle of humerus (underneath the brachioradialis and carpi radialis longus)

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8
Q

what is the distal insertion of the extensor carpi radialis brevis?

A

base of 3rd metacarpal

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9
Q

what is the proximal origin of the extensor digitorum and digits minimi?

A

lateral epicondyle of humerus

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10
Q

what is the distal insertion of the extensor digitorum?

A

extensor expansions of the medial four digits

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11
Q

what is the innervation of the extensor digitorum?

A

posterior interosseous nerve

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12
Q

what is the action of the extensor digitorum?

A

extends 4 digits, assists in wrist in extension

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13
Q

what is the distal insertion of the extensor digiti minimi?

A

extensor expansion of 5th digit

action: extends 5th digit

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14
Q

what muscles have the action of extending, abducting hand at wrist?

A
  • extensor carpi radialis longus

- extensor carpi radialis brevis

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15
Q

what is the proximal origin of the extensor carpi ulnaris?

A

lateral epicondyle of humerus and posterior border of ulna

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16
Q

what is the distal insertion of the extensor carpi ulnaris?

A

base of 5th metacarpal

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17
Q

what is the proximal origin of the anconeus?

A

posterior surface of lateral epicondyle of humerus

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18
Q

what is the distal insertion of the anconeus?

A

lateral surface of olecranon and posterior proximal ulna

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19
Q

what is the action of the anconeus?

A

assists triceps in extending elbow; abducts ulna during pronation

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20
Q

what is the proximal origin of the supinator?

A

lateral epicondyle of humerus, supinator crest of ulna

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21
Q

what is the distal insertion of the supinator?

A

lateral, posterior, and anterior surfaces of radius

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22
Q

what is the action of the supinator?

A

supinates forearm

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23
Q

what is the proximal origin of the abductor pollicis longus?

A

posterior surface of ulna, radius, interosseous membrane

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24
Q

what is the distal insertion of the abductor pollicis longus?

A

base of 1st metacarpal

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25
Q

what is the action of the abductor policies longus?

A

abducts, extends thumb at carpometacarpal joint

26
Q

what is the proximal origin of the extensor pollicis brevis?

A

posterior surface of radius and interosseous membrane

27
Q

what is the distal insertion of the the extensor pollicis brevis?

A

base of proximal phalanx of thumb

28
Q

what is the action of the extensor pollicis brevis?

A

extends proximal phalanx thumb at carpometacarpal joint

29
Q

what is the proximal origin of the extensor pollicis longus?

A

posterior surface of ulna, interosseous membrane

30
Q

what is the distal insertion of the the extensor pollicis longus?

A

base of distal phalanx of thumb

31
Q

what is the action of the extensor pollicis longus?

A

extends distal phalanx thumb at interphalangeal and carpometacarpal joint

32
Q

what is the proximal origin of the extensor indicis?

A

posterior surface of ulna, interosseous membrane

33
Q

what is the distal insertion of the extensor indicis?

A

extensor expansion of 2nd digit

34
Q

what is the action of the extensor indicis?

A

extend 2nd digit and helps extend hand at wrist

35
Q

what is the proximal origin of the flexor digitorum profundus?

A

medial and anterior surface of ulna and interosseous membrane

36
Q

what is the distal insertion of the flexor digitorum profundus?

A

palmer base of distal phalangeal bones of medial four digits

37
Q

what is the action of the flexor digitorum profundus?

A

flexes distal phalangeal bones of the four medial digits; assists in flexion of hand at wrist

38
Q

what is the innervation of the flexor digitorum profundus?

A

(medial part)
ulnar nerve
(lateral part)
medial nerve

39
Q

what is the proximal origin of the flexor pollicis longus?

A

anterior surface of radius and interosseous membrane

40
Q

what is the distal insertion of the flexor pollicis longus?

A

palmer base of distal phalanx of thumb

41
Q

what is the action of the flexor pollicis longus?

A

flexes bones of thumb

42
Q

what is the proximal origin of the pronator quadratus?

A

distal fourth of anterior ulna

43
Q

what is the distal insertion of the pronator quadratus?

A

distal fourth of anterior radius

44
Q

what is the action of the pronator quadratus?

A

pronates forearm

45
Q

what muscles are innervated by the median nerve?

A
  • flexor pollicis longus
  • pronator quadratus
  • pronator teres
  • flexor carpi radialis
  • palmaris longus
  • flexor digitorum superficialis
46
Q

what is the proximal origin of the pronator teres?

A

(2 heads)

medial epicondyle of humerus and proximal surface of ulna

47
Q

what is the distal insertion of the pronator teres muscle?

A

midway along lateral surface of radius

48
Q

what is the action of the pronator teres muscle?

A
  • pronates forearm

- assists w/ elbow flexion

49
Q

what is the proximal origin of the flexor carpi radialis and palmaris longus?

A

medial epicondyle of humerus

50
Q

what is the distal insertion of the flexor carpi radialis?

A

base 2nd metacarpal

51
Q

what is the action of the flexor carpi radialis and flexor carpi ulnaris?

A

flexes + abducts hand at wrist

52
Q

what is the distal insertion of the palmaris longus?

A

palmar aponeurosis

53
Q

what is the action of the palmaris longus?

A

flexes hand + tenses palmar aponeurosis

54
Q

what is the proximal origin of the flexor carpi ulnaris?

A

humeral head: medial epicondyle of humerus

ulnar head: olecranon and posterior border of ulna

55
Q

what is the distal insertion of the flexor carpi ulnaris?

A

pisiform bone, hook of hamate bone, base of 5th metacarpal

56
Q

what is the innervation of the flexor carpi ulnaris?

A

ulnar nerve

57
Q

what is the proximal origin of the flexor digitorum superficialis?

A

humero-ulnar head: medial epicondyle of humerus and coronoid process of ulna
radial head: superior half of anterior radius

58
Q

what is the distal insertion of the flexor digitorum superficialis?

A

bodies of middle phalangeal bones of medial 4 digits

59
Q

what is the action of the flexor digitorum superficialis?

A

flexes middle and proximal phalangeal bones of medial 4 digits; also flexes hand at wrist

60
Q

what is the action of the extensor carpi ulnaris?

A

extends and adducts hand at wrist

Anatomy (11 decks)

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