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forelimb > intrinsic muscles of the forelimb > Flashcards

intrinsic muscles of the forelimb Flashcards

1
Q

what intrinsic muscles are in the lateral scapula and shoulder

A

deltoideus
infraspinatus
teres minor
supraspinatus

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2
Q

origin of the deltoideus

A

spine of the scapula and acromion process of the scapula

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3
Q

insertion of the deltoideus

A

deltoid tuberosity of humerus

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4
Q

innervation of the deltoideus

A

axillary nerve

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5
Q

function of the deltoideus

A

flexes the shoulder

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6
Q

origin of the infraspinatus

A

infraspinous fossa

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7
Q

insertion of the infraspinatus

A

greater tubercle of humerus

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8
Q

innervation of the infraspinatus

A

suprascapular

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9
Q

action of the infraspinatus

A

extends and flexes the shoulder

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10
Q

origin of the teres minor

A

infraglenoid tubercle and distal third of the caudal border of the scapula

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11
Q

insertion of the teres minor

A

teres minor tuberosity of the humerus

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12
Q

innervation of the teres minor

A

axillary nerve

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13
Q

function of the teres minor

A

flexes the shoulder also rotate shoulder laterally and prevent medial rotation during weight bearing

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14
Q

origin of the supraspinatus

A

supraspinous fossa

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15
Q

insertion of the supraspinatus

A

greater tubercle of the humerus via the thick tendon

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16
Q

innervation of the supraspinatus

A

suprascapular nerve

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17
Q

function of the supraspinatus

A

extends and stabilizes shoulder

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18
Q

what are the muscles in the medial scapula and shoulder

A

subscapularis
teres major
coracobrachialis

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19
Q

origin of the subscapularis

A

subscapular fossa of the scapula

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20
Q

insertion of the subscapularis

A

lesser tubercle of the humerus

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21
Q

innervation of the subscapularis

A

axillary and subscapular

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22
Q

function of the subscapularis

A

extends, adducts and medially stabilizes the shoulder

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23
Q

origin of the teres major

A

caudal border and angle of the scapula

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24
Q

insertion of the teres major

A

teres major tuberosity of the humerus

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25
Q

innervation of the teres major

A

axillary

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26
Q

function of the teres major

A

flexes the shoulder, allows medial rotation and prevents lateral rotation of the shoulder

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27
Q

origin of the coracobrachialis

A

coracoid process of the scapula

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28
Q

insertion of the coracobrachialis

A

lesser tubercle of the humerus

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29
Q

innervation of the coracobrachialis

A

musculotcutaneous nerve

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30
Q

function of the coracobrachialis

A

extends shoulder and adducts limb and stabilises the shoulder.

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31
Q

what are the muscles in the caudal arm

A

tensor fasciae antebrachii
triceps brachii - has 4 heads:
long head
lateral head
accessory head
medial head
anconeus

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32
Q

origin of the tensor fasciae antebrachii

A

fascia covering the lateral side of the lattissmus dorsi

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33
Q

insertion of the tensor fasciae antebrachii

A

olecranon

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34
Q

innervation of the tensor fasciae antebrachii

A

radial nerve

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35
Q

function of the tensor fasciae antebrachii

A

extends the elbow

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36
Q

origin of the long head of the triceps brachii

A

caudal border of scapula

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37
Q

insertion of the long head of the triceps brachii

A

olecranon tuber

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38
Q

innervation of the long head of the triceps brachii

A

radial n

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39
Q

function of the long head of the triceps brachii

A

extends elbow and flexes shoulder

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40
Q

origin of the lateral head of the triceps brachii

A

deltoid tuberosity/tricipital line of humerus

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41
Q

insertion of the lateral head of the triceps brachii

A

olecranon tuber

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42
Q

innervation of the lateral head of the triceps brachii

A

radial

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43
Q

function of the lateral head of the triceps brachii

A

extends elbow

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44
Q

origin of the accessory head of the triceps brachii

A

neck of the humerus

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45
Q

insertion of the accessory head of the triceps brachii

A

olecranon tuber

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46
Q

innervation of the accessory head of the triceps brachii

A

radial nerve

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47
Q

function of the accessory head of the triceps brachii

A

extends elbow

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48
Q

origin of the medial head of the triceps brachii

A

proximal humerus near teres major tuberosity

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49
Q

insertion of the medial head of the triceps brachii

A

olecranon tuber

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50
Q

innervation of the medial head of the triceps brachii

A

radial

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51
Q

function of the medial head of the triceps brachii

A

extends elbow

52
Q

origin of the anconeus

A

supracondylar crest and lateral and medial epicondyles of humerus

53
Q

insertion of the anconeus

A

lateral olecranon

54
Q

innervation of the anconeus

A

radial

55
Q

function of the anconeus

A

extends elbow
raises joint capsule to prevent capsules compression during extension of elbow.

56
Q

what are the muscles in the cranial arm

A

biceps brachii
brachialis

57
Q

origin of the biceps brachii

A

supraglenoid tubercle

58
Q

insertion of the biceps brachii

A

cranial aspect of proximal medial radius/ulna

59
Q

innervation of the biceps brachii

A

musculocutaneous

60
Q

function of the biceps brachii

A

extends shoulder and flexes elbow

61
Q

origin of the brachialis

A

proximal lateral surface of the humerus

62
Q

insertion of the brachialis

A

proximal medial radius/ulna

63
Q

innervation of the brachialis

A

musculocutaneous

64
Q

function of the brachialis

A

flexes elbow

65
Q

what are the muscles in the cranial and lateral forearm

A

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

66
Q

origin of the extensor carpi radialis

A

lateral supracondylar crest of the humerus

67
Q

insertion of the extensor carpi radialis

A

proximodorsal surface of metacarpal ii and iii

68
Q

innervation of the extensor carpi radialis

A

radial

69
Q

function of the extensor carpi radialis

A

extends carpus

70
Q

origin of the common digital extensor

A

lateral epicondyle of the humerus

71
Q

insertion of the common digital extensor

A

extensor processes of the distal phelanges if ii, iii, iv and v digits

72
Q

innervation of the common digital extensor

A

radial

73
Q

function of the common digital extensor

A

extends carpus and digits

74
Q

origin of the lateral digital extensor

A

lateral epicondyle of the humerus

75
Q

insertion of the lateral digital extensor

A

proximal end of all phalanges of digits ii,iv and v

76
Q

innervation of the lateral digital extensor

A

radial

77
Q

function of the lateral digital extensor

A

extends capus and joints of digits iii, iv and v

78
Q

origin of the ulnaris lateralis

A

lateral epicondyle of the humerus

79
Q

insertion of the ulnaris lateralis

A

accessory carpal bone and lateral aspect of metacarpal iv

80
Q

innervation of the ulnaris lateralis

A

radial

81
Q

function of the ulnaris lateralis

A

abduct the carpal joint also flex the carpal joints and supports carpus when extended.

82
Q

origin of the supinator

A

lateral epicondyle of the humerus

83
Q

insertion of the supinator

A

proximonocranial surface of radius

84
Q

innervation of the supinator

A

radial

85
Q

function of the supinator

A

rotates forearm laterally and flexes the elbow

86
Q

origin of the abductor digiti longus

A

craniolateral surface of the ulna

87
Q

insertion of the abductor digiti longus

A

proximal end of metacarpal i and ii

88
Q

innervation of the abductor digiti longus

A

radial

89
Q

function of the abductor digiti longus

A

extends the carpus
abducts the first digit or pollex

90
Q

what muscles are in the caudal and medial forearm

A

pronator teres
flexor carpi radials
superficial digital flexor
flexor carpi ulnaris - humeral and ulnar head
deep digital flexor - humeral, ulnar and radial
pronator quadratus
interosseous

91
Q

origin of the pronator terres

A

medial epicondyle of the humerus

92
Q

insertion of the pronator teres

A

proximal medial border of the radius

93
Q

innervation of the pronator teres

A

median nerve

94
Q

function of the pronator teres

A

rotate the forearm medially also flexes the elbow

95
Q

origin of the flexor carpi radialis

A

medial epicondyle of the humerus

96
Q

insertion of the flexor carpi radialis

A

palmar aspect of the metacarpals ii and iii

97
Q

innervation of the flexor carpi radialis

A

median nerve

98
Q

function of the flexor carpi radialis

A

flexes the carpus

99
Q

origin of the superficial digital flexor

A

medial epicondyle of the humerus

100
Q

insertion of the superficial digital flexor

A

palmar aspect of the middle phalanx on all digits

101
Q

innervation of the superficial digital flexor

A

median nerve

102
Q

function of the superficial digital flexor

A

extends elbow, flexes carpus and flexes digit

103
Q

origin of the flexor carpi ulnaris - humeral head

A

medial epicondyle of the humerus

104
Q

insertion of the flexor carpi ulnaris - humeral head

A

accessory carpal bone

105
Q

innervation of the flexor carpi ulnaris - humeral head

A

ulnar nerve

106
Q

function of the flexor carpi ulnaris - humeral head

A

flexes the carpus

107
Q

origin of the flexor carpi ulnaris - ulnar head

A

caudo medial border of the olecranon

108
Q

insertion of the flexor carpi ulnaris - ulnar head

A

accessory carpal bone

109
Q

innervation of the flexor carpi ulnaris - ulnar head

A

ulnar nerve

110
Q

function of the flexor carpi ulnaris - ulnar head

A

flexes the carpus

111
Q

origin of the deep digital flexor - humeral head

A

medial epicondyle of the humerus

112
Q

insertion of the deep digital flexor - humeral head

A

flexor surface of the distal phalanx (3rd)

113
Q

innervation of the deep digital flexor - humeral head

A

median and ulnar

114
Q

function of the deep digital flexor - humeral head

A

extends elbow and flexes carpus and digit

115
Q

origin of the deep digital flexor - ulnar head

A

proximal caudal border of the ulna

116
Q

innervation of the deep digital flexor - ulnar head

A

ulnar

117
Q

origin of the deep digital flexor - radial head

A

medial border of the radius

118
Q

innervation of the deep digital flexor - radial head

A

median

119
Q

origin of the pronator quadratus

A

fills space between radius and ulna

120
Q

insertion of the pronator quadratus

A

apposed surface of the radius and ulna

121
Q

innervation of the pronator quadratus

A

median

122
Q

function of the pronator quadratus

A

pronate the paw

123
Q

origin of the interosseous

A

base of respective metacarpal bone (ii,iii,iv and v)

124
Q

insertion of the interosseous

A

metacarpophalangeal joint

125
Q

innervation of the interosseous

A

deep branch of ulnar nerve

126
Q

function of the interosseous

A

flexes metacarpophalangeal joints, fetlock (ii,iii,iv and v)

forelimb (9 decks)

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