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Anatomy 1 > Intrinsic muscles of the thoracic limb > Flashcards

Intrinsic muscles of the thoracic limb Flashcards

1
Q

lateral scapula and shoulder intrinsic muscles

A

deltoideus, infraspinatus, supraspinatus, teres minor

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2
Q

deltoideus ORIGIN

A

spine and acromial processes of the scapula

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3
Q

deltoideus INSERTION

A

deltoid tuberosity of the humerus

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4
Q

deltoideus ACTION

A

flex the shoulder

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5
Q

infraspinatus ORIGIN

A

infraspinous fossa of the scapula

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6
Q

infraspinatus INSERTION

A

lateral side of the greater tubercle of the humerus

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7
Q

infraspinatus ACTION

A

extend or flex shoulder joint, abduct shoulder and rotate humerus laterally, prevent medial rotation when bearing weight, provide lateral stability to shoulder

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8
Q

teres minor ORIGIN

A

infraglenoid tubercle and distal third of caudal border of scapula

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9
Q

teres minor INSERTION

A

teres minor tuberosity of humerus

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10
Q

teres minor ACTION

A

flex shoulder, rotate shoulder laterally, prevent medial rotation when bearing weight

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11
Q

supraspinatus ORIGIN

A

supraspinatus fossa

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12
Q

supraspinatus INSERTION

A

thick tendon on greater tubercle of the humerus

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13
Q

supraspinatus ACTION

A

extend and stabilize shoulder joint

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14
Q

medial scapula and shoulder intrinsic muscles

A

subscapularis, teres major, coracobrachialis

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15
Q

subscapularis ORIGIN

A

subscapular fossa

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16
Q

subscapularis INSERTION

A

lesser tubercle of the humerus

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17
Q

subscapularis ACTION

A

adduct, extend and medially stabilize shoulder joint, rotate shoulder medially, prevent lateral rotation when weight bearing

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18
Q

teres major ORIGIN

A

caudal angle and border of scapula, caudal surface of subscapularis

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19
Q

teres major INSERTION

A

teres major tuberosity of the humerus

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20
Q

teres major ACTION

A

flex shoulder joint, rotate shoulder joint medially, prevent lateral rotation when weight bearing

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21
Q

coracobrachialis ORIGIN

A

coracoid process of scapula

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22
Q

coracobrachialis INSERTION

A

crest of lesser tubercle of humerus proximal to teres major tuberosity

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23
Q

coracobrachialis ACTION

A

adduct, extend, and stabilize shoulder joint

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24
Q

caudal muscles of the arm/brachium

A

tensor fasciae antebrachii, triceps brachii (long, lateral, accessory, and medial heads), anconeus

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25
Q

tensor fasciae antebrachii ORIGIN

A

fascia of lateral side of latissmus dorsi

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26
Q

tensor fasciae antebrachii INSERTION

A

olecranon of the ulna

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27
Q

tensor fasciae antebrachii ACTION

A

extend the elbow joint

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28
Q

triceps brachii PARTS

A

long head, lateral head, medial head, accessory head

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29
Q

triceps brachii long head ORIGIN

A

caudal border of the scapula

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30
Q

triceps brachii long head INSERTION

A

olecranon tuber of ulna

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31
Q

triceps brachii long head ACTION

A

extend the elbow joint and flex shoulder joint

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32
Q

triceps brachii lateral head ORIGIN

A

tricipital line of the humerus

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33
Q

triceps brachii lateral head INSERTION

A

olecranon tuber of ulna

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34
Q

triceps brachii lateral head ACTION

A

extend the elbow joint

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35
Q

triceps brachii accessory head ORIGIN

A

neck of humerus

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36
Q

triceps brachii accessory head INSERTION

A

olecranon tuber of the ulna

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37
Q

triceps brachii accessory head ACTION

A

extend the elbow joint

38
Q

triceps brachii medial head ORIGIN

A

crest of less tubercle of humerus near the teres major tuberosity

39
Q

triceps brachii medial head INSERTION

A

olecranon of ulna

40
Q

triceps brachii medial head ACTION

A

extend the elbow joint

41
Q

anconeus ORIGIN

A

lateral supracondylar crest and lateral and medial epicondyles of the humerus

42
Q

anconeus INSERTION

A

lateral surface of the proximal end of the ulna (olecranon)

43
Q

anconeus ACTION

A

extend the elbow joint

44
Q

cranial muscles of the arm

A

biceps brachii and brachialis

45
Q

biceps brachii ORIGIN

A

supraglenoid tubercle of scapula

46
Q

biceps brachii INSERTION

A

ulnar and radial tuberosities

47
Q

biceps brachii ACTION

A

flex elbow joint and extend shoulder joint

48
Q

brachialis ORIGIN

A

proximal third of the lateral side of the humerus

49
Q

brachialis INSERTION

A

ulnar and radial tuberosities

50
Q

brachialis ACTION

A

flex elbow joint

51
Q

cranial and lateral forearm muscles

A

extensor carpi radialis, common digital extensor, lateral digital etensor, ulnaris lateralis, supinator, abductor digiti I longus

52
Q

extensor carpi radialis ORIGIN

A

lateral supracondular crest of jumerus

53
Q

extensor carpi radialis INSERTION

A

small tuberosities on dorsal surface of base of metacarpals 2 and 3

54
Q

extensor carpi radialis ACTION

A

extend carpal joint

55
Q

common digital extensor ORIGIN

A

lateral epicondyle of humerus

56
Q

common digital extensor INSERTION

A

extensor processes of distal phalanges of digits 2, 3, 4, and 5

57
Q

common digital extensor ACTION

A

extend joints of 4 main digits and the carpus

58
Q

lateral digital extensor ORIGIN

A

lateral epicondyle of the humerus

59
Q

lateral digital extensor INSERTION

A

proximal ends of all phalanges of digits III, IV, and V (mainly extensor processes of distal phalanages)

60
Q

lateral digital extensor ACTION

A

extend carpal joints and digits III, IV, and V

61
Q

ulnaris lateralis (flexor) ORIGIN

A

lateral epicondyle of the humerus

62
Q

ulnaris lateralis INSERTION

A

lateral aspect of the proximal end of metacarpal V and accessory carpal bone

63
Q

ulnaris lateralis ACTION

A

abduct manus, flex carpal joints, support carpus when extended to support weight

64
Q

supinator ORIGIN

A

lateral epicondyle of humerus

65
Q

supinator INSERTION

A

cranial surface of proximal fourth of the radius

66
Q

supinator ACTION

A

rotate forearm laterally so palmar side of paw faces medially (supination), flex elbow joint

67
Q

abductor digiti I longus ORIGIN

A

lateral border and cranial surface of ulna; interosseus membrane

68
Q

abductor digiti I longus INSERTION

A

proximal end of metacarpal I

69
Q

abductor digiti I longus ACTION

A

abduct first digit/pollex, extend carpal joints

70
Q

caudal and medial muscles of the forearm

A

pronator teres, flexor carpi radialis, superficial digital flexor, flexor carpi ulnaris, deep digital flexor, pronator quadratus

71
Q

pronator teres ORIGIN

A

medial epicondyle of humerus

72
Q

pronator teres INSERTION

A

medial border of the radius between proximal and medial thirds

73
Q

pronator teres ACTION

A

pronate paw – rotate forearm medially so palmar side of the paw faces the ground, flex elbow

74
Q

flexor carpi radius ORIGIN

A

medial epicondyle of humerus and medial border of radius

75
Q

flexor carpi radius INSERTION

A

palmar side of base of the metacarpals II and III

76
Q

flexor carpi radius ACTION

A

flex carpal joints

77
Q

superficial digital flexor ORIGIN

A

medial epicondyle of humerus

78
Q

superficial digital flexor INSERTION

A

palmar surface of the base of the middle phalanges of digits II, III, IV, and V

79
Q

superficial digital flexor ACTION

A

flex carpal, metacarpophalangeal, and proximal interphalangeal joints of digits II, III, IV, and V

80
Q

flexor carpi ulnaris ORIGIN

A

ulnar head – caudal border and medial surface of the olecranon
humeral head – medial epicondyle of humerus

81
Q

flexor carpi ulnaris INSERTION

A

accessory carpal bone

82
Q

flexor carpi ulnaris ACTION

A

flex carpals

83
Q

deep digital flexor ORIGIN

A

humeral head – medial epicondyle of the humerus
ulnar head – proximal 3/4 of caudal border of the ulna
radial head – medial 1/3 of medial border of the radius

84
Q

deep digital flexor INSERTION

A

flexor tubercle on palmar surface of the distal phalynx of each digit

85
Q

deep digital flexor ACTION

A

flex carpal and metacarpal joints and proximal and distal interphalangeal joints of the digits

86
Q

pronator quadratus ATTACHMENTS

A

apposing sides of the ulna and radius

87
Q

pronator quadratus ACTION

A

pronate paw (face palmar side to ground)

88
Q

muscles of the forepaw

A

interossei

89
Q

interossei ORIGIN

A

base of the metcarpal bone and carpal joint capsule

90
Q

interossei INSERTION

A

base of proximal phalynx

91
Q

interossei ACTION

A

when weight bearing, maintains joint angle of paw, support metacarpophalangeal joint

Anatomy 1 (2 decks)

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