Musculature of the thoratic limb Flashcards Preview

week 2 - forelimb > Musculature of the thoratic limb > Flashcards

Flashcards in Musculature of the thoratic limb Deck (81)
Loading flashcards...
1

origin of M. trapezium pars cervicalis

Median fibrous raphe of the neck, as far cranially as C3

2

Origin of M. trapezium pars thoracica

Lig. supraspinale, as far caudally as T9

3

Insertion of M. trapezium pars cervicalis

The length of the scapular spine, except for a small portion ventrally

4

Insertion of M. trapezium pars thoracica

The dorsal third of the scapular spine

5

Function of M. trapezium

rotates the scapula and therefore either advances or retracts the forelimb. If both parts act together - raises the scapula against the trunk and lifts the limb

6

Origin of latissimus dorsi

A broad aponeurosis from the superficial thoracolumbar fascia and the lateral surfaces of the last three ribs

7

Insertion of M. latissimus dorsi

Tuberositas teres major and the fasci on the lateral surfase of M. triceps brachii caput longum

8

Function of M. latissimus dorsi

Retraction of the free limb and flexion of the shoulder. If the thoratic limbs are fixed in extension, bi-lateral contraction draws the trunk forward and flexes the back

9

Origin of M. rhomboideus capitis

The lateral edge of the M. rhomboideus cervicis at about the level of C4

10

Origin og M. rhomboideus cervicis

Median fibrous raphe of the neck (as far cranially as C2) and the spinous processes of T1-T3

11

Origin of M. rhomboideus thoracis

Spinous processes of T4-T7

12

Insertion of M. rhomboideus capitis

Crista nuchae (skull)

13

Insertion of M. rhomboideus cervicis

Scapulla, medially on the dorsal margin

14

Insertion of M. rhomboideus thoracis

Scapula, medially on the dorsal margin and a small area laterally, just cranially to the caudal angle.

15

Function of M. rhomboideus

Advances or retracts the limb, depending on the limb's position when the muscle contracts, and elevation of the scapula and the limb.
When the lims are fixed: bi-lateral contection stabilizes the head and extends the neck; unilateral contraction flexes the neck laterally.

16

Origin of M. cleidobrachialis

Intersectio clavicularis

17

Insertion of M. cleidobrachialis

Crista humeri

18

Origin of M. cleidocephalicus

Intersectio clavicularis

19

Insertion of M. cleidocephalicus pars cervicalis

Crista nuchae and median fibrous raphe of the neck

20

Insertion of M. cleidocephalicus pars mastoidea

Mastoid process of the temporal bone

21

Function of M. brachiocephalicus

Unilateral contraction advances the limb.
When limbs are fixed, bilateral contraction flexes the neck and unilateral contraction flexes the neck laterally

22

Origin of M. omotransversarius

Ventral part of the scapular spine

23

Insertion of M. omotransversarius

wing of the atlas

24

Function of M. omotransversarius

To advance the limb. When the limbs are fixed, bilateral contraction flexes the neck, while unilateral contraction flexes the neck laterally

25

Who are the Mm. pectorales superficiales

M. pectoralis descendens and M. pectoralis transversus

26

Origin of M. pectoralis descendens

Manubrium sterni (cranial part of the sternum)

27

Insertion of M. pectoralis descendens

Distal portion of the crista tuberculi majoris of the humerus

28

Function of M. pectoralis descendens

Protraction or retraction (depending on the limb's initial position) and adduction of the limb

29

Origin of M. pectoralis transversus

ventral aspect of the sternum, from the manubrium to the third costal cartilage

30

Insertion of M. pectoralis transversus

Distal portion of the crista tuberculi majoris of the humerus

31

Function of M. pectoralis transversus

Protraction or retraction (depending on the limb's initial position) and adduction of the limb

32

Origin of M. pectoralis profundus majoris

The sternum, on the ventral midline

33

Origin of M. pectoralis profundus minoris

abdominal fascia

34

Insertion of M. pectoralis profundus majoris

mainly on tubercle minor, but also sends a small band of muscle and aponeurosis to the cranio-medial aspect of tubercle major, on the proximal portion of crista tuberculi majoris. it helps holding the biceps in place

35

Insertion of M. pectoralis profundus minoris

blend with the fascia on the medial aspect of the brachium

36

Function of M. pectoralis profundus

Extension of the shoulder; retraction and adduction of the limb. while running (limbs fixed in extension) - slings trunk forward.

37

Origin of M. serratus ventralis cervicis

transverse processes of C3-C7

38

Origin of M. serratus ventralis thoracis

lateral surfaces of ribs 1-8. caudally, the muscle bundles interdigitate with the most cranial insertions of the M. obliquus externus abdominis

39

Insertion of M. serratus ventralis

Facies serrata of the scapula

40

Function of M. serratus ventralis

Suspention of the trunk. cervical part retracts the limb, thoratic part advances it.
When limbs are fixed, unilateral contection of the cervical part flexes the neck laterally, bilateral contraction lifts the neck

41

Medial border of the Axilla

The thoratic wall and the M. serratus thoracis

42

Lateral border of the Axilla

Scapula and its medial musculature

43

Cranial border of the Axilla

M. brachiocephalicus

44

Caudal border of the Axilla

M. latissimus dorsi

45

Origin of M. deltoideus pars scapularis

a broad aponeurosis from the scapular spine and the underlying M. infraspinatus

46

Origin of M. deltoideus pars acromialis

the hamatus process of the acromion

47

Insertion of M. deltoideus

tuberositas deltoidea of the humerus

48

Function of M. deltoideus

Flexion of the shoulder joint

49

Origin of M. infraspinatus

Fossa infraspinata of the scapula

50

Insertion of M. infraspinatus

Facies m. infraspinati of the humerus

51

Function of M. infraspinatus

Flexion or extension of the shoulder joint; abduction and outward rotation of the humerus. also, the tendon of insertion stabilizes the shoulder joint by acting as a lateral collateral ligament

52

Origin of M. supraspinatus

Fossa supraspinata of the scapula

53

Insertion of M. supraspinatus

Tubercle majus of the humerus

54

Function of M. supraspinatus

Extention and stabilazation of the shoulder joint

55

Origin of M. coracobrachialis

Coracoid process of the scapula

56

Insertion of M. coracobrachialis

Distal portion of the crista tuberculi minoris

57

Function of M. coracobrachialis

Adduction and extension of the shoulder joint

58

Origin of M. subscapularis

Fossa subscapularis of the scapula

59

Insertion of M. subscapularis

Tubercle minus of the humerus

60

Function of M. subscapularis

Flexion, extension, adduction and stabilazation of the shoulder joint

61

Origin of M. teres major

Caudal angle and proximal caudal margin of the scapula

62

Insertion of M. teres major

Tuberositas teres major, together with M. lattisimus dorsi

63

Function of M. teres major

Flexion of the shoulder joint

64

Origin of M. biceps brachii

Tubercle supraglenoidale of the scapula

65

Insertion of M. biceps brachii

The stronger part inserts medially on the ulna, just distal to the medial coronoid process
The weaker part inserts on the tuberositas radii

66

Function of M. biceps brachii

Flexion of the elbow joint; extension and stabilazation of the shoulder joint

67

Origin of M. triceps brachii long caput longum

Tubercle infrraglenoidale and the caudal margin of the scapula

68

Origin of M. triceps brachii caput laterale

Linea m. tricipitis of the humerus

69

Origin of M. triceps brachii caput mediale

Crista tuberculi minoris

70

Origin of M. triceps brachii caput accessorium

Caudal surface of the humeral neck

71

Insertion of M. triceps brachii

The olecranon

72

Function of M. triceps brachii

Extension of the elbow joint. the long head is also a powerful flexor of thr shoulder

73

Origin of M. brachialis

Caudo-lateral surface of the proximal humerus, just distal to the origin of M. triceps brachii caput accessorium and caudo-distally to the tuberosits teres major

74

Insertion of M. brachialis

Medially on the ulna (immediately distal to the biceps ulna insertion) and with the weaker tendon of the biceps at the tuberositas brachii

75

Function of M. brachialis

Flexion of the elbow joint

76

Origin of M. anconeus

Lateral epicondyle and supracondylar crest, and the proximo-medial rim of the fossa olecrani

77

Insertion of M. anconeus

Laterally on the olecranon, just distal to the insertion of the triceps

78

Function of M. anconeus

Extension of the elbow joint; tensing of the elbow joint capsule

79

Origin of M. teres minor

Tubercule infraglenoidale and distal caudal margin of the Scapula

80

Insertion of M. teres minor

Tuberositas teres minor on the Linea m. tricipitis of the Humerus

81

Function of M. teres minor

Flexion of the shoulder joint