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

Musculature of the thoratic limb Flashcards

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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
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

week 2 - forelimb (1 decks)

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