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

Musculature of the thoratic limb Flashcards

1
Q

origin of M. trapezium pars cervicalis

A

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

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2
Q

Origin of M. trapezium pars thoracica

A

Lig. supraspinale, as far caudally as T9

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3
Q

Insertion of M. trapezium pars cervicalis

A

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

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4
Q

Insertion of M. trapezium pars thoracica

A

The dorsal third of the scapular spine

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5
Q

Function of M. trapezium

A

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

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6
Q

Origin of latissimus dorsi

A

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

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7
Q

Insertion of M. latissimus dorsi

A

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

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8
Q

Function of M. latissimus dorsi

A

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

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9
Q

Origin of M. rhomboideus capitis

A

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

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10
Q

Origin og M. rhomboideus cervicis

A

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

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11
Q

Origin of M. rhomboideus thoracis

A

Spinous processes of T4-T7

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12
Q

Insertion of M. rhomboideus capitis

A

Crista nuchae (skull)

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13
Q

Insertion of M. rhomboideus cervicis

A

Scapulla, medially on the dorsal margin

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14
Q

Insertion of M. rhomboideus thoracis

A

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

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15
Q

Function of M. rhomboideus

A

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.

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16
Q

Origin of M. cleidobrachialis

A

Intersectio clavicularis

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17
Q

Insertion of M. cleidobrachialis

A

Crista humeri

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18
Q

Origin of M. cleidocephalicus

A

Intersectio clavicularis

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19
Q

Insertion of M. cleidocephalicus pars cervicalis

A

Crista nuchae and median fibrous raphe of the neck

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20
Q

Insertion of M. cleidocephalicus pars mastoidea

A

Mastoid process of the temporal bone

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21
Q

Function of M. brachiocephalicus

A

Unilateral contraction advances the limb.

When limbs are fixed, bilateral contraction flexes the neck and unilateral contraction flexes the neck laterally

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22
Q

Origin of M. omotransversarius

A

Ventral part of the scapular spine

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23
Q

Insertion of M. omotransversarius

A

wing of the atlas

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24
Q

Function of M. omotransversarius

A

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

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25
Q

Who are the Mm. pectorales superficiales

A

M. pectoralis descendens and M. pectoralis transversus

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26
Q

Origin of M. pectoralis descendens

A

Manubrium sterni (cranial part of the sternum)

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27
Q

Insertion of M. pectoralis descendens

A

Distal portion of the crista tuberculi majoris of the humerus

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28
Q

Function of M. pectoralis descendens

A

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

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29
Q

Origin of M. pectoralis transversus

A

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

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30
Q

Insertion of M. pectoralis transversus

A

Distal portion of the crista tuberculi majoris of the humerus

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31
Q

Function of M. pectoralis transversus

A

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

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32
Q

Origin of M. pectoralis profundus majoris

A

The sternum, on the ventral midline

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33
Q

Origin of M. pectoralis profundus minoris

A

abdominal fascia

34
Q

Insertion of M. pectoralis profundus majoris

A

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
Q

Insertion of M. pectoralis profundus minoris

A

blend with the fascia on the medial aspect of the brachium

36
Q

Function of M. pectoralis profundus

A

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

37
Q

Origin of M. serratus ventralis cervicis

A

transverse processes of C3-C7

38
Q

Origin of M. serratus ventralis thoracis

A

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

39
Q

Insertion of M. serratus ventralis

A

Facies serrata of the scapula

40
Q

Function of M. serratus ventralis

A

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
Q

Medial border of the Axilla

A

The thoratic wall and the M. serratus thoracis

42
Q

Lateral border of the Axilla

A

Scapula and its medial musculature

43
Q

Cranial border of the Axilla

A

M. brachiocephalicus

44
Q

Caudal border of the Axilla

A

M. latissimus dorsi

45
Q

Origin of M. deltoideus pars scapularis

A

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

46
Q

Origin of M. deltoideus pars acromialis

A

the hamatus process of the acromion

47
Q

Insertion of M. deltoideus

A

tuberositas deltoidea of the humerus

48
Q

Function of M. deltoideus

A

Flexion of the shoulder joint

49
Q

Origin of M. infraspinatus

A

Fossa infraspinata of the scapula

50
Q

Insertion of M. infraspinatus

A

Facies m. infraspinati of the humerus

51
Q

Function of M. infraspinatus

A

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
Q

Origin of M. supraspinatus

A

Fossa supraspinata of the scapula

53
Q

Insertion of M. supraspinatus

A

Tubercle majus of the humerus

54
Q

Function of M. supraspinatus

A

Extention and stabilazation of the shoulder joint

55
Q

Origin of M. coracobrachialis

A

Coracoid process of the scapula

56
Q

Insertion of M. coracobrachialis

A

Distal portion of the crista tuberculi minoris

57
Q

Function of M. coracobrachialis

A

Adduction and extension of the shoulder joint

58
Q

Origin of M. subscapularis

A

Fossa subscapularis of the scapula

59
Q

Insertion of M. subscapularis

A

Tubercle minus of the humerus

60
Q

Function of M. subscapularis

A

Flexion, extension, adduction and stabilazation of the shoulder joint

61
Q

Origin of M. teres major

A

Caudal angle and proximal caudal margin of the scapula

62
Q

Insertion of M. teres major

A

Tuberositas teres major, together with M. lattisimus dorsi

63
Q

Function of M. teres major

A

Flexion of the shoulder joint

64
Q

Origin of M. biceps brachii

A

Tubercle supraglenoidale of the scapula

65
Q

Insertion of M. biceps brachii

A

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

66
Q

Function of M. biceps brachii

A

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

67
Q

Origin of M. triceps brachii long caput longum

A

Tubercle infrraglenoidale and the caudal margin of the scapula

68
Q

Origin of M. triceps brachii caput laterale

A

Linea m. tricipitis of the humerus

69
Q

Origin of M. triceps brachii caput mediale

A

Crista tuberculi minoris

70
Q

Origin of M. triceps brachii caput accessorium

A

Caudal surface of the humeral neck

71
Q

Insertion of M. triceps brachii

A

The olecranon

72
Q

Function of M. triceps brachii

A

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

73
Q

Origin of M. brachialis

A

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
Q

Insertion of M. brachialis

A

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

75
Q

Function of M. brachialis

A

Flexion of the elbow joint

76
Q

Origin of M. anconeus

A

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

77
Q

Insertion of M. anconeus

A

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

78
Q

Function of M. anconeus

A

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

79
Q

Origin of M. teres minor

A

Tubercule infraglenoidale and distal caudal margin of the Scapula

80
Q

Insertion of M. teres minor

A

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

81
Q

Function of M. teres minor

A

Flexion of the shoulder joint

week 2 - forelimb (1 decks)

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