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Muscles > Upper Limb > Flashcards

Upper Limb Flashcards

0
Q

Insertion of Pectoralis Major

A

lateral lip of intertubercular groove

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1
Q

Origin of Pectoralis Major

A

clavicular head: anterior surface of medial half of clavicle

sternocostal head: anterior surface of sternum, superior six costal cartilages, aponeurosis of external oblique muscle

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2
Q

Innervation of Pectoralis Major

A

lateral and medial pectoral nerves
clavicular head C5, C6
sternocostal head C7, C8, T1

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3
Q

Actions of Pectoralis Major

A

adducts and medially rotates shoulder joint, draws scapula anteriorly and inferiorly

alone, clavicular head flexes shoulder joint and sternocostal head extends it from flexed position

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4
Q

Origin of Pectoralis Mino

A

3rd-5th ribs near their costal cartilages

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5
Q

Insertion of Pectoralis Minor

A

superior surface and medial border of coracoid process

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6
Q

Innervation of Pectoralis Minor

A

medial pectoral nerve C8, T1

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7
Q

Actions of Pectoralis Minor

A

stabilizes scapula by drawing anterior and inferiorly against thoracic wall

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8
Q

Origin of Subclavius

A

junction of 1st rib and its costal cartilage

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9
Q

Insertion of Subclavius

A

inferior surface of middle 1/3 of clavicle

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10
Q

Innervation of Subclavius

A

nerve to subclavius C5, C6

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11
Q

Actions of Subclavius

A

anchors and depresses clavicle

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12
Q

Origin of Serratus Anterior

A

external surfaces of lateral part of 1st-8th ribs

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13
Q

Insertion of Serratus Anterior

A

anterior surface of medial border of scapula

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14
Q

Innervation of Serratus Anterior

A

long thoracic nerve C5, C6, C7

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15
Q

Actions of Serratus Anterior

A

protracts scapula and holds against thoracic wall; rotates scapula

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16
Q

Origin of Deltoid

A

lateral 1/3 of clavicle, acromion, and spine of scapula

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17
Q

Insertion of Deltoid

A

deltoid tuberosity of humerus

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18
Q

Innervation of Detoid

A

axillary nerve C5, C6

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19
Q

Actions of Deltoid

A

clavicular part flexes and medially rotates shoulder joint;
acromial part abducts shoulder joint;
spinal part extends and laterally rotates shoulder joint

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20
Q

Origin of Supraspinatus

A

supraspinous fossa

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21
Q

Insertion of Supraspinatus

A

superior facet of greater tubercle of humerus

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22
Q

Innervation of Supraspinatus

A

suprascapular nerve C4, C5, C6

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23
Q

Action of Supraspinatus

A

initiates and assists deltoid with abduction of the shoulder joint; holds head of humerus in glenoid cavity

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24
Q

Origin of Infraspinatus

A

infraspinous fossa

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25
Q

Insertion of Infraspinatus

A

middle facet of greater tubercle of humerus

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26
Q

Innervation of Infraspinatus

A

suprascapular nerve C5, C6

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27
Q

Actions of Infraspinatus

A

laterally rotates and extends shoulder joint; holds humeral head in glenoid cavity

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28
Q

Origin of Teres Minor

A

middle part of lateral border of scapula

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29
Q

Insertion of Teres Minor

A

inferior facet of greater tubercle of humerus

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30
Q

Innervation of Teres Minor

A

axillary nerve C5, C6

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31
Q

Actions of Teres Minor

A

laterally rotates and extends shoulder joint; holds humeral head in glenoid cavity

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32
Q

Origin of Teres Major

A

inferior part of lateral border of scapula and posterior surface of inferior angle of scapula

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33
Q

Insertion of Teres Major

A

medial lip of intertubercular sulcus of humerus

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34
Q

Innervation of Teres Major

A

lower subscapular nerve C5, C6

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35
Q

Actions of Teres Major

A

adducts and medially rotates shoulder joint

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36
Q

Origin of Subscapularis

A

subscapular fossa

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37
Q

Insertion of Subscapularis

A

lesser tubercle of humerus

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38
Q

Innervation of Subscaplaris

A

upper and lower subscapular nerve C5, C6, C7

39
Q

Actions of Subscapularis

A

medially rotates and adducts shoulder joint; helps hold humeral head in glenoid cavity

40
Q

Origin of Biceps Brachii

A

short head: tip of coracoid process of scapula

long head: supraglenoid tubercles of scapula

41
Q

Insertion of Biceps Brachii

A

radial tuberosity and fascia of forearm via bicipital aponeurosis

42
Q

Innervation of Biceps Brachii

A

musculotaneous nerve C5, C6

43
Q

Actions of Biceps Brachii

A

supinates forearm, and, when supinated, flexes the elbow joint; flexes shoulder joint; short head resists dislocation of shoulder

44
Q

Origin of Brachialis

A

distal half of anterior surface of humerus

45
Q

Insertion of Brachialis

A

coranoid process and tuberosity of ulna

46
Q

Innervation of Brachialis

A

musculotaneous nerve C5, C6

47
Q

Actions of Brachialis

A

elbow flexion in all positions

48
Q

Origin of Coracobrachialis

A

tip of coracoid process of scapula

49
Q

Insertion of Coracobrachialis

A

middle 1/3 of medial surface of humerus

50
Q

Innervation of Coracobrachialis

A

musculotaneous nerve C5, C6, C7

51
Q

Actions of Coracobrachialis

A

helps flex and adduct shoulder joint; resists dislocation of shoulder

52
Q

Origin of Triceps Brachii

A

long head: infraglenoid tubercle of scapula
lateral head: posterior surface of humerus, superior to radial groove
medial head: posterior surface of humerus, inferior to radial groove

53
Q

Insertion of Triceps Brachii

A

proximal end of olecranon of ulna and fascia of forearm

54
Q

Innervation of Triceps Brachii

A

radial nerve C6, C7, C8

55
Q

Actions of Triceps Brachii

A

chief extensor of elbow joint; long head extends shoulder joint and resists dislocation of humerus

56
Q

Origin of Pronator Teres

A

humeral head: medial epicondyle of humerus

ulnar head: coranoid process of ulna

57
Q

Insertion of Pronator Teres

A

middle convexity of lateral surface of radius

58
Q

Innervation of Pronator Teres

A

median nerve C6, C7

59
Q

Actions of Pronator Teres

A

pronates and flexes forearm

60
Q

Origin of Flexor Carpi Radialis

A

medial epicondyle of humerus

61
Q

Insertion of Flexor Carpi Radialis

A

base of 2nd (3rd) metacarpal

62
Q

Innervation of Flexor Carpi Radialis

A

median nerve C6, C7

63
Q

Actions of Flexor Carpi Radialis

A

flexes and abducts hand at wrist

64
Q

Origin of Palmaris Longus

A

medial epicondyle of humerus

65
Q

Insertion of Palmaris Longus

A

distal half of flexor retinaculum and palmar aponeurosis

66
Q

Innervation of Palmaris Longus

A

median nerve C7, C8

67
Q

Actions of Palmaris Longus

A

flexes hand and tenses palmar aponeurosis

68
Q

Origin of Flexor Carpi Ulnaris

A

humeral head: medial epicondyle of humerus

ulnar head: olecranon and posterior border of ulna via aponeurosis

69
Q

Insertion of Flexor Carpi Ulnaris

A

pisiform, hook of hamate, and 5th metacarpal

70
Q

Innervation of Flexor Carpi Ulnaris

A

ulnar nerve C7, C8

71
Q

Origin of Flexor Digitorum Superficialis

A

humero-ulnar head: medial epicondyle of humerus and coranoid process of ulna
radial head: oblique line of radius

72
Q

Insertion of Flexor Digitorum Superficialis

A

shafts of middle phalanges of medial four digits

73
Q

Innervation of Flexor Digitorum Superficialis

A

median nerve C7, C8, T1

74
Q

Actions of Flexor Digitorum Superficialis

A

flexes wrist joint

flexes proximal IP joints of middle four digits; acting more strongly, flexes proximal phalanges at MCP joints

75
Q

Origin of Flexor Digitorum Profundus

A

proximal 3/4 of medial and anterior surfaces of ulna and interosseous membrane

76
Q

Insertion of Flexor Digitorum Profundus

A

bases of distal phalanges of 2nd-5th digits

77
Q

Innervation of Flexor Digitorum Profundus

A 
lateral part (digits 2-3): anterior interosseous of median nerve C8, T1
medial part (digits 4-5): ulnar nerve C8, T1
78
Q

Actions of Flexor Digitorum Profundus

A

flexes wrist joint
flexes distal IP joints of digits 2-5; assists with wrist flexion
flexes MCP joints

79
Q

Origin of Flexor Pollicis Longus

A

anterior surface of radius and adjacent interosseous membrane

80
Q

Insertion of Flexor Pollicis Longus

A

base of distal phalanx of thumb

81
Q

Innervation of Flexor Pollicis Longus

A

anterior interosseous nerve, from median nerve C8, T1

82
Q

Actions of Flexor Pollicis Longus

A

flexes wrist

flexes MCP and IP joints of thumb

83
Q

Origin of Pronator Quadratus

A

distal 1/4 of anterior surface of ulna

84
Q

Insertion of Pronator Quadratus

A

distal 1/4 of anterior surface of radius

85
Q

Innervation of Pronator Quadraus

A

anterior interosseous nerve, from median nerve C8, T1

86
Q

Actions of Pronator Quadratus

A

pronates forearm; deep fibers bind ulna and radius together

87
Q

Insertion of Brachioradialis

A

lateral surface of distal end of radius proximal to styloid process

88
Q

Insertion of Extensor Carpi Radialis Longus

A

dorsal aspect of base of 2nd metacarpal

89
Q

Actions of Brachioradialis

A

relatively weak flexion of elbow joint; maximal when forearm is in midpronated position

90
Q

Actions of Extensor Carpi Radialis Longus

A

extend and abduct wrist joint

91
Q

Actions of Extensor Digitorum

A

extend wrist joint;

extend medial four fingers primarily at MCP joints; secondarily at IP joints

92
Q

Origin of Supinator

A

crest of ulna, anular ligament, radial collateral ligament, lateral epicondyle of humerus, supinator fossa

93
Q

Insertion of Supinator

A

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

94
Q

Actions of Abductor Pollicis Longus

A

extends wrist joint; abducts thumb and extends it at CMC joint

95
Q

Actions of Extensor Pollicis Longus

A

extends wrist joint;

extends distal phalanx of thumb at IP joints; extends MCP and CMC joints

96
Q

Actions of Extensor Pollicis Longus

A

extends wrist joint;

extends proximal phalanx of thumb at MCP joint; extends CMC joint

Muscles (4 decks)

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