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Anatomy Course : ) > Week 3 Lecture 5 > Flashcards

Week 3 Lecture 5 Flashcards

1
Q

What are the superficial Muscles from the posterior side?

A

Brachioradialis, extensor carpi radialis longus, extensor carpi radialis brevis, extensor digitorum, extensor carpi ulnaris

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2
Q

1

A

Head of humerus

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3
Q

What is instrinsic muscles?

A

Muscles of the hand

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4
Q

2

A

Anatomical Head

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5
Q

3

A

Greater tubercle

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6
Q

4

A

Lesser Tubercle

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7
Q

5

A

Intertubercular sulcus/groove

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8
Q

6

A

Surgical neck

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9
Q

7

A

Deltoid Tuberosity

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10
Q

8

A

Radial Groove

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11
Q

Do the reposition movement of the thumb

A

-

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12
Q

What are the deep posterior muscles?

A

Supinator, Abductor pollicis longus, Extensor pollicis longus, Extensor pollicis brevis, extensor indicis

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13
Q

Brachioradialis Action

A

Flexes the forearm

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14
Q

Brachioradialis Innervation

A

Radial Nerve

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15
Q

Extensor Carpi Radialis Longus (Superficial) Action

A

Extends and abducts (radial deviation) hand at wrist joint

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16
Q

Extensor Carpi Radialis Longus (Superficial) Innervation

A

Radial Nerve

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17
Q

Extensor Carpi Radialis Brevis (Superficial) Action

A

Extends and abducts (radial deviation) hand at the wrist joint

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18
Q

Extensor Carpi Radialis Brevis (Superficial) Innervation

A

Radial Nerve

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19
Q

Extensor Digitorum (Superficial) Origin

A

Lateral epicondyle of humerus

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20
Q

Extensor Digitorum (Superficial) Insertion

A

Extensor expansions of medial four digits

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21
Q

Extensor Digitorum (Superficial) Action

A

Extends the medial 4 fingers at the metacarpophalangeal joints and extends hand at the wrist joint

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22
Q

Extensor Digitorum (Superficial) Innervation

A

Radial Nerve

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23
Q

Extensor Carpi Ulnaris (Superficial) Origin

A

Lateral Epicondyle of humerus and posterior border of ulna

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24
Q

Extensor Carpi of Ulnaris (Superficial) Insertion

A

Base of 5th metacarpal

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25
Q

Extensor Carpi Ulnaris (Superficial) Action

A

Extends and adducts (ulnar deviation) hand at the wrist joint

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26
Q

Extensor Carpi Ulnaris (Superficial) Innervation

A

Radial Nerve (OMG REMEMBER THIS BECAUSE THE FLEXOR CARPI ULNARIS IS FOR THE

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27
Q

What muscles make up the deep layer of the posterior part of the hand?

A

Supinator, Abductor pollicis longus, extensor pollicis longus, extensor pollicis brevis, extensor indicis

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28
Q

Supinator (Deep) Origin

A

Lateral Epicondyle of humerus, radius collateral and annular ligaments, supinator fossa and crest of ulna

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29
Q

Supinator (Deep) Insertion

A

Wraps around and inserts on proximal 1/3 of radius

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30
Q

Supinator (Deep) Action

A

Supinates the forearm

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31
Q

Supinator (Deep) Innervation

A

Radial Nerve

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32
Q

Extensor Indicis (Deep) Origin

A

Posterior Surface of Ulna and interosseous membrane

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33
Q

Extensor Indicis (Deep) Insertion

A

Extensor expansion of 2nd digit (the index finger)

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34
Q

Extensor Indicis (Deep) Action

A

Extends the index finger and helps to extend the hand

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35
Q

Extensor Indicis (Deep) Innervation

A

Radial Nerve

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36
Q

Abductor Pollicis Longus (Deep) Origin

A

Posterior surface of ulna, radius and interosseous membrane

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37
Q

Abductor Pollicis Longus (Deep) Insertion

A

Base of 1st Metacarpal

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38
Q

Abductor Pollicis Longus (Deep) Action

A

Abducts the thumb and extends it at carpo-metacarpal joint

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39
Q

Abductor Pollicis Longus (Deep) Innervation

A

Radial Nerve

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40
Q

Extensor Pollicis Longus (Deep) Origin

A

Posterior Surface of Middle 1/3 Ulna and Interosseous Membrane

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41
Q

Extensor Pollicis Longus (Deep) Insertion

A

Base of Distal Phalanx of Thumb

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42
Q

Extensor Pollicis Longus (Deep) Action

A

Extends distal Phalanx of thumb at carpometacarpal and interphalangeal joints

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43
Q

Extensor Pollicis Longus (Deep) Innervation

A

Radial Nerve

44
Q

Extensor Pollicis Brevis (Deep) Origin

A

Posterior Surface of radius and interosseous membrane

45
Q

Extensor Pollicis Brevis (Deep) Insertion

A

Base of proximal Phalanx of thumb

46
Q

Extensor Pollicis Brevis (Deep) Action

A

Extends proximal phalanx of thymb at carpometacarpal joint

47
Q

Extensor Pollicis Brevis (Deep) Innervation

A

Radial Nerve

48
Q

What run underneath the anatomical snuff box?

A

Radial Artery, Terminal Branches of the Radial Nerve, Cutaneous br of Raidal Nerve, Scaphoid bone

49
Q

What does Extrinsic Muscles Mean?

A

Have Muscle bellies located outside the hand

50
Q

List all of the Extrinsic Muscles

A

Flexor Pollicis Longus, Abductor Pollicis Longus, Extensor Pollicis Longus, Extensor Pollicis Brevis

51
Q

What are intrinsic muscles of hand (thenar muscles)?

A

Abductor pollicis brevis, flexor pollicis brevis, opponens pollicis, adductor pollicis

52
Q

What does intrinstic Muscles mean?

A

Responsible for fine movements of hand

53
Q

What are the groups of muscles for the hand?

A
  1. Thenar muscles (4)
  2. Hypothenar muscles (3)
  3. Palmar muscles
    - Lumbricals (worm-like)
    - Interosseous
    - 3 Palmar (3 PAD)
    - 4 dorsal (4 DAB)
54
Q

Abductor Pollicis Brevis (thenar) Origin

A

Flexor Reticulum and tubercles of scaphoid and trapezium

55
Q

Abductor Pollicis Brevis (thenar) Insertion

A

Lateral side of base of proximal phalax of thumb

56
Q

Abductor Pollicis Brevis (thenar) Action

A

Abducts thumb and helps oppose it

57
Q

Abductor Pollicis Brevis (thenar) Innervation

A

Recurrent Branch of Median Nerve

58
Q

Flexor Pollicis Brevis (thenar) Origin

A

Flexor retinaculum and tubercles of
scaphoid and trapezium

59
Q

Flexor Pollicis Brevis (thenar) Insertion

A

lateral side of base of proximal phalanx
of thumb

60
Q

Flexor Pollicis Brevis (thenar)
Action

A

Flexes thumb

61
Q

Flexor Pollicis Brevis (thenar) Innervation

A

recurrent branch of Median Nerve

62
Q

Opponens Pollicis (thenar) Origin

A

Flexor retinaculum and tubercles of
scaphoid and trapezium

63
Q

Opponens Pollicis (thenar) Insertion

A

Lateral side of 1st Metacarpal

64
Q

Opponens Pollicis (thenar) action

A

draws first metacarpal laterally to
oppose thumb towards centre of palm and
rotates it medially

65
Q

Opponens Pollicis (thenar) Innervation

A

recurrent branch of Median Nerve

66
Q

Adductor Pollicis (thenar)* Origin

A

2nd and 3rd Metacarpal

67
Q

Adductor Pollicis (thenar)* Insertion

A

proximal phalanx and 1st
metacarpa

68
Q

Adductor Pollicis (thenar) Action

A

Adductions thumb

69
Q

Adductor Pollicis (thenar)* Innervation

A

deep branch of Ulnar Nerve

70
Q

Hypothenar muscles (act on the pinky!)

A

Abductor digiti minimi
* Opponens digiti minimi
* Flexor digiti minimi

71
Q

Abductor Digiti Minimi (hypothenar) Origin

A

pisiform

72
Q

Abductor Digiti Minimi (hypothenar) Insertion

A

medial side of base of proximal
phalanx of little finger (5th digit)

73
Q

Abductor Digiti Minimi (hypothenar) Action

A

abducts the little finger

74
Q

Abductor Digiti Minimi (hypothenar) Innervation

A

deep branch of Ulnar Nerve

75
Q

Flexor Digiti Minimi Brevis (hypothenar) Origin

A

hook of hamate and flexor retinaculum

76
Q

Flexor Digiti Minimi Brevis (hypothenar) Insertion

A

medial side of base of proximal
phalanx of little finger

77
Q

Flexor Digiti Minimi Brevis (hypothenar) Action

A

flexes proximal phalanx of little finger

78
Q

Flexor Digiti Minimi Brevis (hypothenar) Innervation

A

deep branch of Ulnar Nerve

79
Q

Opponens Digiti Minimi (hypothenar) Origin

A

hook of hamate and flexor retinaculum

80
Q

Opponens Digiti Minimi (hypothenar) Insertion

A

medial border of 5th metacarpal

81
Q

Opponens Digiti Minimi (hypothenar) Action

A

draws 5th metacarpal anteriorally and
rotates it, bringing the pinky into opposition with
the thumb

82
Q

Opponens Digiti Minimi (hypothenar) Innervation

A

deep branch of Ulnar Nerve

83
Q

Palmar Muscles

A
  1. Lumbricals
  2. Interosseus (between bones)
    - 3 PAD (palmar)
    - 4 DAB (dorsal)
84
Q

Palmar Interossei Function

A

adduct the fingers towards the
middle finger (uni-pennate) PAD

85
Q

Palmar Interossei Insertion

A

Proximal Phalanx

86
Q

Dorsal Interossei Functions

A

abduct the fingers away from the
middle finger (bi-pennate) DAB

87
Q

Dorsal Interossei Origin

A

Metacarpal

88
Q

Dorsal Interossei Insertion

A

Proximal Phalanx

89
Q

Lumbricals Functions

A

Allow flexion at the metacarpophalangeal joints (MCP)
* While maintaining extension at the interphalangeal joints (IP)
* 4 lumbricals located in each hand

90
Q

Lumbricals Origin

A

Proximal attachment to the tendons of flexor digitorum profundus

91
Q

Lumbricals Insertion

A

Distal attachment to extensor expansions on the dorsal surface

92
Q

Lumbricals Innervation

A

1-2 lumbricals = median nerve, 2-4 lumbricals = ulnar nerve

93
Q
A

Radial nerve most likely to be damaged. Extensor pollicus longus

94
Q

A B C

A

A = radius, B = ulna, C = base of 2nd matacarpal

95
Q
A

Flexor digitorum superficialis, Flexor digitorum profundus, Flexor pollicis longus (median nerve)

96
Q

A male rugby player suffered a fractured digit when the ball tipped off of his 4th digit. The radiograph is
shown here. What muscle will be impacted by this fracture and innervation?

A

Flexor Digitorum Profundus, ulnar nerve, Median Nerve (C8, T1) for 2nd and 3rd digits. Ulnar Nerve (C8, T1) for 4th
(this fracture) and 5th digits.

97
Q

In this anterior view of the elbow, identify the muscle that is indicated by the arrow and innervation.

A

supinator . Feedback: Supinator originates on the lateral epicondyle of the humerus (and part of the ulna) and spirals
around the radius. It is innervated by the radial nerve.

98
Q
A

Coracobrachialis - Flexion and adduction of the arm

99
Q

1

A

Brachioradialis

100
Q

2

A

Pronator Teres

101
Q

3

A

Flexor carpi radialis

102
Q

4

A

Palmaris longus

103
Q

5

A

Flexor carpi ulnaris

104
Q

6

A

Flexor digitorum superficialis

105
Q

7

A

Flexor digitorum profundus

106
Q

8

A

Flexor pollicis longus

107
Q

If the musculocutaneous nerve is severed at its origin from the brachial plexus, flexion at the elbow is
greatly weakened but not abolished. What muscle remains operative and can contribute to flexion?

A

Brachialis

Anatomy Course : ) (10 decks)

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