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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
tensor fasciae antebrachii ORIGIN
fascia of lateral side of latissmus dorsi
26
tensor fasciae antebrachii INSERTION
olecranon of the ulna
27
tensor fasciae antebrachii ACTION
extend the elbow joint
28
triceps brachii PARTS
long head, lateral head, medial head, accessory head
29
triceps brachii long head ORIGIN
caudal border of the scapula
30
triceps brachii long head INSERTION
olecranon tuber of ulna
31
triceps brachii long head ACTION
extend the elbow joint and flex shoulder joint
32
triceps brachii lateral head ORIGIN
tricipital line of the humerus
33
triceps brachii lateral head INSERTION
olecranon tuber of ulna
34
triceps brachii lateral head ACTION
extend the elbow joint
35
triceps brachii accessory head ORIGIN
neck of humerus
36
triceps brachii accessory head INSERTION
olecranon tuber of the ulna
37
triceps brachii accessory head ACTION
extend the elbow joint
38
triceps brachii medial head ORIGIN
crest of less tubercle of humerus near the teres major tuberosity
39
triceps brachii medial head INSERTION
olecranon of ulna
40
triceps brachii medial head ACTION
extend the elbow joint
41
anconeus ORIGIN
lateral supracondylar crest and lateral and medial epicondyles of the humerus
42
anconeus INSERTION
lateral surface of the proximal end of the ulna (olecranon)
43
anconeus ACTION
extend the elbow joint
44
cranial muscles of the arm
biceps brachii and brachialis
45
biceps brachii ORIGIN
supraglenoid tubercle of scapula
46
biceps brachii INSERTION
ulnar and radial tuberosities
47
biceps brachii ACTION
flex elbow joint and extend shoulder joint
48
brachialis ORIGIN
proximal third of the lateral side of the humerus
49
brachialis INSERTION
ulnar and radial tuberosities
50
brachialis ACTION
flex elbow joint
51
cranial and lateral forearm muscles
extensor carpi radialis, common digital extensor, lateral digital etensor, ulnaris lateralis, supinator, abductor digiti I longus
52
extensor carpi radialis ORIGIN
lateral supracondular crest of jumerus
53
extensor carpi radialis INSERTION
small tuberosities on dorsal surface of base of metacarpals 2 and 3
54
extensor carpi radialis ACTION
extend carpal joint
55
common digital extensor ORIGIN
lateral epicondyle of humerus
56
common digital extensor INSERTION
extensor processes of distal phalanges of digits 2, 3, 4, and 5
57
common digital extensor ACTION
extend joints of 4 main digits and the carpus
58
lateral digital extensor ORIGIN
lateral epicondyle of the humerus
59
lateral digital extensor INSERTION
proximal ends of all phalanges of digits III, IV, and V (mainly extensor processes of distal phalanages)
60
lateral digital extensor ACTION
extend carpal joints and digits III, IV, and V
61
ulnaris lateralis (flexor) ORIGIN
lateral epicondyle of the humerus
62
ulnaris lateralis INSERTION
lateral aspect of the proximal end of metacarpal V and accessory carpal bone
63
ulnaris lateralis ACTION
abduct manus, flex carpal joints, support carpus when extended to support weight
64
supinator ORIGIN
lateral epicondyle of humerus
65
supinator INSERTION
cranial surface of proximal fourth of the radius
66
supinator ACTION
rotate forearm laterally so palmar side of paw faces medially (supination), flex elbow joint
67
abductor digiti I longus ORIGIN
lateral border and cranial surface of ulna; interosseus membrane
68
abductor digiti I longus INSERTION
proximal end of metacarpal I
69
abductor digiti I longus ACTION
abduct first digit/pollex, extend carpal joints
70
caudal and medial muscles of the forearm
pronator teres, flexor carpi radialis, superficial digital flexor, flexor carpi ulnaris, deep digital flexor, pronator quadratus
71
pronator teres ORIGIN
medial epicondyle of humerus
72
pronator teres INSERTION
medial border of the radius between proximal and medial thirds
73
pronator teres ACTION
pronate paw -- rotate forearm medially so palmar side of the paw faces the ground, flex elbow
74
flexor carpi radius ORIGIN
medial epicondyle of humerus and medial border of radius
75
flexor carpi radius INSERTION
palmar side of base of the metacarpals II and III
76
flexor carpi radius ACTION
flex carpal joints
77
superficial digital flexor ORIGIN
medial epicondyle of humerus
78
superficial digital flexor INSERTION
palmar surface of the base of the middle phalanges of digits II, III, IV, and V
79
superficial digital flexor ACTION
flex carpal, metacarpophalangeal, and proximal interphalangeal joints of digits II, III, IV, and V
80
flexor carpi ulnaris ORIGIN
ulnar head -- caudal border and medial surface of the olecranon humeral head -- medial epicondyle of humerus
81
flexor carpi ulnaris INSERTION
accessory carpal bone
82
flexor carpi ulnaris ACTION
flex carpals
83
deep digital flexor ORIGIN
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
deep digital flexor INSERTION
flexor tubercle on palmar surface of the distal phalynx of each digit
85
deep digital flexor ACTION
flex carpal and metacarpal joints and proximal and distal interphalangeal joints of the digits
86
pronator quadratus ATTACHMENTS
apposing sides of the ulna and radius
87
pronator quadratus ACTION
pronate paw (face palmar side to ground)
88
muscles of the forepaw
interossei
89
interossei ORIGIN
base of the metcarpal bone and carpal joint capsule
90
interossei INSERTION
base of proximal phalynx
91
interossei ACTION
when weight bearing, maintains joint angle of paw, support metacarpophalangeal joint

Anatomy 1 (2 decks)

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