Lecture 4 - Pectoral girdle Flashcards Preview

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Flashcards in Lecture 4 - Pectoral girdle Deck (56):
1

What part of the skeleton make up the pectoral girdle?

Coracoid, scapula, and clavicle

2

What part of the skeleton makes up the brachium?

Humerus

3

What part of the skeleton makes up the ante brachium?

Radius and ulna

4

What part of the skeleton makes up the carpus?

carpal bones

5

What part of the skeleton makes up the metacarpus?

metacarpal bones

6

What part of the skeleton makes up the digits?

Proximal, middle, and distal phalanges

7

Cingulum

shoulder

8

Stylopodium

brachium

9

Zeugopodium

antebrachium

10

Autopodium

manus

11

Basipodium

carpus

12

Metapodium

metacarpus

13

Acropodium

digit

14

What animals have complete pectoral girdles?

reptiles, birds, and monotremes

15

What is the structure of the pectoral girdle in MOST animals?

coracoid is reduced to a coracoid process

16

What is the clavicle like in cursorial quadrupedal mammals?

reduced or absent , no bony attachment of limb to pelvis

17

What is different about the scapula in a horse?

Dorsal aspect is extended by cartilage
Spine does not terminate at acromion process
Tuber spinae

18

What is the tuber spinae?

Thickened middle portion of the spine

19

What goes through the supracondylar foramen?

Brachial artery and medial nerve

20

What is different about the humerus of the horse?

Greater tubercle - cranial and caudal portion
Intermediate tubercle

21

Why is the shoulder joint in domestic animals restricted?

Due to the extensive muscling around the joint

22

In what way is the shoulder joint in domestic animals restricted?

sagittal excursions

23

What bony parts are in the glena-humeral joint?

head of humerus, gleaned of scapular

24

What cartilage structure helps support the gleno-hemeral joint?

labrum

25

Why does the shoulder joint have to be supported by muscles and tendons?

lacks collaeral ligaments

26

What can the synovial fuss be confused with?

lesions on the cartilage

27

What is the brachial plexus formed by?

ventral rami of C6-T2 (variations of C5-T1)

28

What are the nerves of the BP that go to the extrinsic limb muscles?

Cranial pectoral, long thoracic, thoracodorsal, lateral thoracic, and caudal pectoral

29

What nerve contributes to the long thoracic?

C7

30

What muscle does the long thoracic n. innervate?

Serratus ventralis

31

What nerve contributes to the thoracodorsal n.?

C8

32

What muscle does the throacodorsal n.?

Latissimus dorsi

33

What nerve contributes to the lateral thoracic n.?

T1

34

What muscle does the lateral thoracic n. innervate?

Cutaneous trunci

35

What nerve contributes to cranial/caudal pectoral n.?

T1

36

What muscle does cranial/caudal pectoral n. innervate?

Pectoral mm.

37

What arteries come off the brachiocephalic trunk in the dog?

right subclavian a.
common carotid aa. (off short bicarotid trunk)

38

What branches off the aorta in dogs?

Brachiocephalic trunk and left subclavian a.

39

What arteries supply the shoulder?

Superficial cervial a., suprascapular a., and subscapular a.

40

What do the muscles of the pectoral girdle do?

1) suspend the thorax
2) stabilize the shoulder
3) move the limb

41

In what directions does the scapula move?

cranial-caudal
dorsal-ventral
rotatory manner

42

What movement advances the limb?

rotation that moves glenoid cranially

43

What movement retracts the limb?

rotation that moves glenoid more ventrally

44

What are the parts of the rhomboideus?

thoracis, cervicis, and capitis

45

What are the parts of the serrates ventralis?

thoracis and cervicis

46

What muscle do horses have that dogs don't?

Subclavius

47

What are the extrinsic shoulder muscles?

Omotransversarius, trapezius, brachiocephalicus, rhomboideus, latissimus dorsi, pectoralis profundus, subclavius (horse)
Serratus ventralis

48

What are the muscles of the thorax?

Superficial pectoral m., Deep pectoral m.,

49

What makes up the synarcosis in the shoulder?

pectoralis profundus and pelvic girdle muscles

50

What is a synarcosis?

union of parts of the skeleton via muscles

51

Whats makes the muscular supportive sling present in horses and cattle?

Serratus ventralis and pectoralis profundus

52

What does this muscular sling do?

Transmit weight of head, neck and cranial part of trunk to forelimbs
Prevent thorax from collapsing

53

What does the pectoral girdle do in regards to the scapula?

Stabilize it against external forces

54

What is an external force that harms the scapula?

force of landing after jumping or pouncing can cause displacement or rotation of the scapula

55

What is a rupture of the serratus ventralis?

severe trama to neck and withers where serratus ventralis attaches

56

What is the progonosis of a serratus ventralis rupture?

Rarely see a full recovery
Surgery or euthanize