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Muscles > Forearm > Flashcards

Forearm Flashcards

1
Q

Enumerate superficial group of flexors of the forearm

A
  • pronator teres
  • flexor carpi radialis
  • palmaris longus
  • flexor digitorum superficialis
  • flexor carpi ulnaris
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2
Q

Pronator Teres Origin

A

Superficial (humeral) head: common flexor origin

Deep Ulnar Head: medial border of coronoid process of the ulna

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3
Q

Insertion of Pronator Teres

A

Middle of the lateral surface of the shaft of the radius

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4
Q

Nerve Supply of Pronator Teres

A

Median Nerve

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5
Q

Actions of pronator teres

A

Helps in elbow flexion

Pronation

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6
Q

Origin of Flexor Carpi Radialis

A

Common flexor origin

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7
Q

Insertion of Flexor Carpi Radialis

A

2nd and 3rd metacarpal bones

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8
Q

Nerve Supply of Flexor Carpi Radialis

A

Median nerve

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9
Q

Action of flexor carpi Radialis

A

Flexion of the wrist
Abduction of the wrist
Flexion of the forearm

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10
Q

Origin of Palmaris Longus

A

Common flexor origin

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11
Q

Insertion of Palmaris Longus

A

Apex of palmar aponeurosis

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12
Q

Nerve Supply of palmaris longus

A

Median Nerve

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13
Q

Action of palmaris longus

A

Flexion of the wrist

Tension of palmar aponeurosis

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14
Q

Origin of flexor digitorum superficialis

A

Humeroulnar head: common flexor origin

Radial head: oblique line infront of the shaft of the humerus

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15
Q

Insertion of flexor digitorum superficialis

A

4 tendons into middle phalanges of medial 4 fingers
Divide when reaching the proximal phalanges
Reunite
Insert into sides of middle phalanges

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16
Q

Origin of Flexor Carpi Ulnaris

A

Humeral head: common flexor origin

Ulnar head: olecranon process, posterior border of ulna

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17
Q

Insertion of Flexor Carpi Ulnaris

A

Pisiform bone
Pisohamate ligament
Pisometacarpal ligament

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18
Q

Nerve Supply of Flexor Carpi Ulnaris

A

Ulnar nerve

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19
Q

Actions of Flexor Carpi Ulnaris

A
  • flexion of wrist joint
  • adduction of wrist joint
  • flexion of forearm
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20
Q

Origin of Flexor Pollicis Longus

A
  • upper 3/4 of anterior surface of shaft of the humerus

- interosseous membrane

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21
Q

Insertion of Flexor Pollicis Longus

A

Base of terminal phalanx of the thumb

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22
Q

Nerve Supply of Flexor Pollicis Longus

A

Anterior interosseous nerve

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23
Q

Action of Flexor Pollicis Longus

A
  • flexion of all thumb joints

- helps in wrist flexion

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24
Q

Origin of Flexor Digitorum Profundus

A
  • upper 3/4 of anterior and medial surfaces of the shaft of the ulna
  • interosseous membrane
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25
Q

Insertion of Flexor Digitorum Profundus

A

Bases of terminal phalanges of medial 4 fingers

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26
Q

Nerve Supply of Flexor Digitorum Profundus

A

Medial 1/2 by ulnar nerve

Lateral half by anterior interosseous nerve

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27
Q

Actions of Flexor Digitorum Profundus

A
  • flexion of all joints of the medial 4 fingers

- helps in flexion of the wrist joint

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28
Q

Origin of Pronator Quadratus

A

lower 1/4 of anterior surface of shaft of the ulna

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29
Q

Insertion of Pronator Quadratus

A

lower 1/4 of anterior surface of the shaft of the radius

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30
Q

Nerve Supply of Pronator Quadratus

A

Pronation of the forearm

31
Q

Origin of Brachioradialis

A

upper 2/3 of lateral supracondylar ridge of the humerus

32
Q

Insertion of Brachioradialis

A

Base of styloid process of the radius

33
Q

Nerve Supply of Brachioradialis

A

radial nerve

34
Q

Action of Brachioradialis

A

flexion of elbow at midprone position

35
Q

Origin of extensor carpi radialis longus

A

lower 1/3 of lateral supracondylar ridge of the humerus

36
Q

Insertion of Extensor Carpi Radialis Longus

A

posterior surface of the base of the 2nd metacarpal bone

37
Q

Nerve Supply of the Extensor Carpi Radialis Longus

A

Radial Nerve

38
Q

Actions of Extensor Carpi Radialis Longus

A

-extension
-abduction
of the wrist

39
Q

Origin of Extensor Digitorum

A

common extensor origin

40
Q

Insertion of Extensor Digitorum

A

Distal phalanges via dorsal mechanism of digits 2-5 (extensor expansion)

41
Q

Nerve Supply of Extensor Digitorum

A

Posterior Interosseous nerve

42
Q

Actions of Extensor Digitorum

A

Extension of all joints of the medial 4 fingers

Helps in wrist extension

43
Q

Origin of Extensor Digiti Minimi

A

Common extensor origin

44
Q

Insertion of Extensor Digiti Minimi

A

Extensor expansion of the little finger

45
Q

Nerve Supply of Extensor Digiti Minimi

A

Posterior interosseous nerve

46
Q

Actions of Extensor Digiti Minimi

A
  • extension of all little finger joints

- wrist extension

47
Q

Origin of extensor carpi ulnaris

A
  • common extensor origin

- posterior border of ulna

48
Q

Insertion of extensor carpi ulnaris

A

posterior surface of the base of the 5th metacarpal bone

49
Q

Nerve Supply of extensor carpi ulnaris

A

Posterior interosseous nerve

50
Q

Action of extensor carpi ulnaris

A

-Extension
-adduction
of the wrist

51
Q

Origin of Anconeus

A

Posterior aspect of lateral epicondyle of the humerus

52
Q

Insertion of Anconeus

A

Lateral surface of olecranon process of the ulna

53
Q

Nerve Supply of the Anconeus

A

Radial nerve

54
Q

Action of the Anconeus

A

Extension of elbow

55
Q

Origin of Supinator

A
  • supinator crest and fossa in ulna
  • lateral epicondyle of the humerus
  • lateral ligament of elbow joint
  • annular ligament
56
Q

Insertion of Supinator

A

upper 1/3 of radius shaft

57
Q

Nerve supply of Supinator

A

Posterior interosseous nerve

58
Q

Action of Supinator

A

Supination of the forearm

59
Q

Origin of Abductor Pollicis Longus

A
  • posterior surface of ulna
  • poterior surface of radius
  • interosseous membrane
60
Q

Insertion of Abductor Pollicis Longus

A

Posterior surface of the base of 1st metacarpal bone

61
Q

Nerve Supply of Abductor Pollicis Longus

A

Posterior interosseous nerve

62
Q

Action of Abductor Pollicis Longus

A
  • abduction of the thumb

- extension of the thumb at the carpometacarpal joint

63
Q

Origin of Extensor Pollicis Brevis

A
  • posterior surface of radius

- interosseous membrane

64
Q

Insertion of Extensor Pollicis Brevis

A

Proximal phalanx of the thumb

65
Q

Nerve supply of Extensor Pollicis Brevis

A

Posterior interosseous nerve

66
Q

Actions of Extensor Pollicis Brevis

A

-Extension of metacarpophalangeal and carpometacarpal joints of the thumb

67
Q

Origin of Extensor Pollicis Longus

A
  • posterior surface of the ulna

- interosseous membrane

68
Q

Insertion of Extensor Pollicis Longus

A

Distal phalanx of the thumb

69
Q

Nerve Supply of Extensor Pollicis Longus

A

Posterior interosseous nerve

70
Q

Action of Posterior interosseous nerve

A
  • extension of all thumb joints

- abduction of thumb

71
Q

Origin of Extensor Indicis

A
  • posterior surface of the ulna

- interosseous membrane

72
Q

Insertion of Extensor Indicis

A

Extensor expansion of the index finger

73
Q

Nerve Supply of Extensor Indicis

A

Posterior interosseous nerve

74
Q

Actions of Extensor Indicis

A

Extension of all index finger joints

Muscles (9 decks)

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