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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
Q

Origin: supraspinatus

A

Supraspinous fossa and spine of scapula

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26
Q

Insertion: supraspinatus

A

Greater and lesser tubercles of humerus

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27
Q

Action: supraspinatus

A

Extend the shoulder, cranial shoulder stabilizer

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28
Q

Innervation: supraspinatus

A

Suprascapular nerve

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29
Q

Origin: infraspinatus

A

Infraspinous fossa

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30
Q

Insertion: infraspinatus

A

Greater tubercle of the humerus

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31
Q

Action: infraspinatus

A

Abduct the limb, acts as a lateral collateral ligament in the shoulder

32
Q

Innervation: infraspinatus

A

Axillary nerve

33
Q

Origin: deltoideus

A

Spine of scapula and aponeurosis over the infraspinatus muscle

34
Q

Insertion: deltoideus

A

Deltoid tuberosity

35
Q

Action: deltoideus

A

Flex the shoulder and abduct the limb

36
Q

Innervation: deltoideus

A

Axillary nerve

37
Q

Origin: subscapularis

A

Subscapular fossa

38
Q

Insertion: subscapularis

A

Lesser tubercle of the humerus

39
Q

Action: subscapularis

A

Adduct the humerus, medial shoulder stabilizer

40
Q

Innervation: subscapularis

A

Subscapular and axillary nerves

41
Q

Origin: biceps brachii

A

Supraglenoid tubercle

42
Q

Insertion: biceps brachii

A

Radial tuberosity, and tendon of extensor carpi radialis via the lacertus fibrosis

43
Q

Action: biceps brachii

A

Flex the elbow, extend the shoulder and carpus

44
Q

Innervation: biceps brachii

A

Musculocutaneous nerve

45
Q

Origin: triceps brachii (three heads)

A

Long: caudal boarder of the scapula
Lateral: lateral surface of the humerus
Medial: medial surface of humerus

46
Q

Insertion: triceps brachii (three heads)

A

All heads: olecranon

47
Q

Action: triceps brachii (three heads)

A

Long: extend the elbow and flex the shoulder

Lateral and medial: extend the elbow

48
Q

Innervation: triceps brachii (three heads)

A

All heads: radial nerve

49
Q

Origin: extensor carpi radialis

A

Lateral epicondyle of the humerus

50
Q

Insertion: extensor carpi radialis

A

Metacarpal tuberosity of metacarpal III

51
Q

Action: extensor carpi radialis

A

Extend the carpus and flex the elbow

52
Q

Innervation: extensor carpi radialis

A

Radial nerve

53
Q

Origin: ulnaris lateralis

A

Lateral epicondyle of the humerus

54
Q

Insertion: ulnaris lateralis

A

Accessory carpal bone C IV and metacarpal IV

55
Q

Action: ulnaris lateralis

A

Flex the carpus and extend the elbow

56
Q

Innervation: ulnaris lateralis

A

Radial nerve

57
Q

Origin: common digital extensor

A

Lateral epicondyle of the humerus, lateral tuberosity of the radius, lateral surface of the body of the ulna

58
Q

Insertion: common digital extensor

A

Extensor process of the third phalanx

59
Q

Action: common digital extensor

A

Extend the digit and carpus, flex the elbow

60
Q

Innervation: common digital extensor

A

Radial nerve

61
Q

Origin: flexor carpi radialis

A

Medial epicondyle of the humerus

62
Q

Insertion: flexor carpi radialis

A

Metacarpal II

63
Q

Action: flexor carpi radialis

A

Flex the carpus and extend the elbow

64
Q

Innervation: flexor carpi radialis

A

Median nerve

65
Q

Origin: superficial digital flexor

A

Medial epicondyle of humerus and caudal surface of radius

66
Q

Insertion: superficial digital flexor

A

Proximal part of the second phalanx and distal part of the first phalanx

67
Q

Action: superficial digital flexor

A

Flex the digit and carpus, extend the elbow

68
Q

Innervation: superficial digital flexor

A

Ulnar nerve

69
Q

Origin: deep digital flexor

A

Medial epicondyle of the humerus, olecranon, and the caudal surface of the radius

70
Q

Insertion: deep digital flexor

A

Flexor surface of the third phalanx

71
Q

Action: deep digital flexor

A

Flex the digit and carpus, extend the elbow

72
Q

Innervation: deep digital flexor

A

Median and ulnar nerves

73
Q

Origin: interosseus (suspensory ligament)

A

Palmar surface of metacarpal III and distal row of carpal bones

74
Q

Insertion: interosseus (suspensory ligament)

A

Abaxial surfaces of proximal sesmoids and tendon of the common digital extensor

75
Q

Action: interosseus (suspensory ligament)

A

Support the fetlock and prevent overextension

76
Q

Innervation: interosseus (suspensory ligament)

A

Palmar metacarpal nerve (sensory only)

Large Animal Anatomy (7 decks)

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