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Large Animal Anatomy > Muscle Origins, Insertions, Actions, and Innervations for Final > Flashcards

Muscle Origins, Insertions, Actions, and Innervations for Final Flashcards

1
Q

Origin: levator labii

A

Zygomatic, lacrimal, and superioris maxillary bones

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2
Q

Insertion: levator labii

A

Upper lip

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3
Q

Action: levator labii

A

Raises the upper lip

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4
Q

Innervation: levator labii

A

Facial nerve

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5
Q

Origin: buccinator

A

Maxilla and mandible

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6
Q

Insertion: buccinator

A

Commissure of mouth

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7
Q

Action: buccinator

A

Retracts the commissure of the mouth and flattens the cheeks

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8
Q

Innervation: buccinator

A

Facial nerve

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9
Q

Origin: masseter

A

Facial crest and zygomatic arch

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10
Q

Insertion: masseter

A

Ramus of mandible

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11
Q

Action: masseter

A

Closes the mouth

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12
Q

Innervation: masseter

A

Mandibular division of the trigeminal nerve

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13
Q

Origin: occipitomandibularis

A

Jugular process of occipital bone

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14
Q

Insertion: occipitomandibularis

A

Caudal border of the mandible

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15
Q

Action: occipitomandibularis

A

Opens the mouth

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16
Q

Innervation: occipitomandibularis

A

Facial nerve

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17
Q

Origin: cricoarytenoideus dorsalis

A

Lamina of the cricoid cartilage

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18
Q

Insertion: cricoarytenoideus dorsalis

A

Arytenoid cartilage (via muscular process)

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19
Q

Action: cricoarytenoideus dorsalis

A

Opens the glottis

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20
Q

Innervation: cricoarytenoideus dorsalis

A

Recurrent laryngeal nerve

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21
Q

Origin: cricoarytenoideus lateralis

A

Arch of the cricoid cartilage

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22
Q

Insertion: cricoarytenoideus lateralis

A

Arytenoid cartilage (via a muscular process)

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23
Q

Action: cricoarytenoideus lateralis

A

Closes the glottis

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24
Q

Innervation: cricoarytenoideus lateralis

A

Recurrent laryngeal nerve

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25
Origin: supraspinatus
Supraspinous fossa and spine of scapula
26
Insertion: supraspinatus
Greater and lesser tubercles of humerus
27
Action: supraspinatus
Extend the shoulder, cranial shoulder stabilizer
28
Innervation: supraspinatus
Suprascapular nerve
29
Origin: infraspinatus
Infraspinous fossa
30
Insertion: infraspinatus
Greater tubercle of the humerus
31
Action: infraspinatus
Abduct the limb, acts as a lateral collateral ligament in the shoulder
32
Innervation: infraspinatus
Axillary nerve
33
Origin: deltoideus
Spine of scapula and aponeurosis over the infraspinatus muscle
34
Insertion: deltoideus
Deltoid tuberosity
35
Action: deltoideus
Flex the shoulder and abduct the limb
36
Innervation: deltoideus
Axillary nerve
37
Origin: subscapularis
Subscapular fossa
38
Insertion: subscapularis
Lesser tubercle of the humerus
39
Action: subscapularis
Adduct the humerus, medial shoulder stabilizer
40
Innervation: subscapularis
Subscapular and axillary nerves
41
Origin: biceps brachii
Supraglenoid tubercle
42
Insertion: biceps brachii
Radial tuberosity, and tendon of extensor carpi radialis via the lacertus fibrosis
43
Action: biceps brachii
Flex the elbow, extend the shoulder and carpus
44
Innervation: biceps brachii
Musculocutaneous nerve
45
Origin: triceps brachii (three heads)
Long: caudal boarder of the scapula Lateral: lateral surface of the humerus Medial: medial surface of humerus
46
Insertion: triceps brachii (three heads)
All heads: olecranon
47
Action: triceps brachii (three heads)
Long: extend the elbow and flex the shoulder | Lateral and medial: extend the elbow
48
Innervation: triceps brachii (three heads)
All heads: radial nerve
49
Origin: extensor carpi radialis
Lateral epicondyle of the humerus
50
Insertion: extensor carpi radialis
Metacarpal tuberosity of metacarpal III
51
Action: extensor carpi radialis
Extend the carpus and flex the elbow
52
Innervation: extensor carpi radialis
Radial nerve
53
Origin: ulnaris lateralis
Lateral epicondyle of the humerus
54
Insertion: ulnaris lateralis
Accessory carpal bone C IV and metacarpal IV
55
Action: ulnaris lateralis
Flex the carpus and extend the elbow
56
Innervation: ulnaris lateralis
Radial nerve
57
Origin: common digital extensor
Lateral epicondyle of the humerus, lateral tuberosity of the radius, lateral surface of the body of the ulna
58
Insertion: common digital extensor
Extensor process of the third phalanx
59
Action: common digital extensor
Extend the digit and carpus, flex the elbow
60
Innervation: common digital extensor
Radial nerve
61
Origin: flexor carpi radialis
Medial epicondyle of the humerus
62
Insertion: flexor carpi radialis
Metacarpal II
63
Action: flexor carpi radialis
Flex the carpus and extend the elbow
64
Innervation: flexor carpi radialis
Median nerve
65
Origin: superficial digital flexor
Medial epicondyle of humerus and caudal surface of radius
66
Insertion: superficial digital flexor
Proximal part of the second phalanx and distal part of the first phalanx
67
Action: superficial digital flexor
Flex the digit and carpus, extend the elbow
68
Innervation: superficial digital flexor
Ulnar nerve
69
Origin: deep digital flexor
Medial epicondyle of the humerus, olecranon, and the caudal surface of the radius
70
Insertion: deep digital flexor
Flexor surface of the third phalanx
71
Action: deep digital flexor
Flex the digit and carpus, extend the elbow
72
Innervation: deep digital flexor
Median and ulnar nerves
73
Origin: interosseus (suspensory ligament)
Palmar surface of metacarpal III and distal row of carpal bones
74
Insertion: interosseus (suspensory ligament)
Abaxial surfaces of proximal sesmoids and tendon of the common digital extensor
75
Action: interosseus (suspensory ligament)
Support the fetlock and prevent overextension
76
Innervation: interosseus (suspensory ligament)
Palmar metacarpal nerve (sensory only)

Large Animal Anatomy (7 decks)

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