Pelvic Limb 5, Thoracic Limb 1 Flashcards

1
Q

In the horse, what does the superficial peroneal n. supply?

A

Only cutaneous to distal limb

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2
Q

In the horse, what does the deep peroneal n. divide into and where does this happen?

A

medial and lateral dorsal MT nn. @ proximal cannon bone

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3
Q

In the horse, what runs bt the medial and lateral dorsal MT nn.?

A

long digital flexor tendon

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4
Q

In the horse, where do the medial and lateral dorsal MT nn. run to?

A

all the way to the coffin joint

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5
Q

In the horse, what does the tibial n. divide into and where does this happen?

A

medial and lateral plantar nn. @ hock

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6
Q

In the horse, what does the medial plantar n. give off below the hock and where does it course?

A

communicating branch; courses over the SDF tendon

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7
Q

In the horse, which limb usually has the communicating branch from the medial plantar n. and what is the relative size?

A

thoracic limb; it is a lot larger than in the pelvic limb

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8
Q

In the horse, what does the medial plantar n. terminate as and where does this happen?

A

medial digital n. after passing the fetlock

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9
Q

In the horse, what does the lateral plantar n. branch into and where does this happen?

A

lateral and medial plantar MT nn.; branch at the proximal cannon bone

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10
Q

In the horse, what do the lateral and medial plantar MT nn. innervate and where do they run?

A

suspensory ligament; run deep to the suspensory ligament

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11
Q

In the horse, what does the lateral plantar n. terminate as and where does this happen?

A

lateral digital n. after passing the fetlock

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12
Q

In the rmt, where does the superficial peroneal n. run in relation to the horse?

A

Runs more distally

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13
Q

In the rmt, what does the superficial peroneal n. branch into?

A

dorsal common digital nn. II, III, IV

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14
Q

In the rmt, what does the dorsal common digital n. II terminate as?

A

dorsal proper digital nn. (axial II and abaxial III)

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15
Q

In the rmt, what does the dorsal common digital n. III terminate as?

A

dorsal proper digital nn. (axial III and axial IV)

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16
Q

In the rmt, what does the dorsal common digital n. IV terminate as?

A

dorsal proper digital nn. (abaxial IV, axial V)

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17
Q

In the rmt, what does the dorsal common digital n. III give off at the fetlock and what does it join?

A

Gives off communicating branch that joins dorsal MT n. III

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18
Q

In the rmt, which dorsal common digital n. is superficial?

A

IV

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19
Q

In the rmt, what is the distal course of the dorsal MT n. III?

A

Swings from dorsal to plantar aspect to join the plantar proper digital nn. (axial)

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20
Q

In the rmt, what does the deep peroneal n. become and where does this happen?

A

dorsal MT n. III @ proximal cannon bone

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21
Q

In the rmt, what is the peroneal n. deep to?

A

digital extensor tendons

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22
Q

In the rmt, what does the tibial n. divide into?

A

medial and lateral plantar nn.

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23
Q

In the rmt, what does the lateral plantar n. give off below the hock and what does it supply?

A

plantar MT n. –> interosseus m.

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24
Q

In the rmt, after the lateral plantar n. gives off the plantar MT n., what does it become?

A

plantar common digital n. IV

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25
Q

In the rmt, what does the plantar common digital n. IV terminate as?

A

plantar proper digital n. (abaxial IV)

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26
Q

In the rmt, what does the medial plantar n. divide into at the mid-distal cannon bone?

A

plantar common digital nn. II and III

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27
Q

In the rmt, what does the plantar common digital n. II terminate as?

A

plantar proper digital n. (abaxial III)

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28
Q

In the rmt, what does the plantar common digital n. III terminate as?

A

plantar proper digital n. (axial III and IV)

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29
Q

In the rmt, where should you block the distal limb on the dorsal side?

A

just below the hock

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30
Q

In the rmt, where should you block the distal limb on the plantar side?

A

proximal to the hock

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31
Q

What is the clinical significance of the ligament of the ergot in the horse and why is it important to know what this ligament is?

A

There is no clinical significance; important to know what it is bc it looks like a digital n.

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32
Q

In the horse, where do the dorsal branches of the digital nn. course and what do these branches supply?

A

Bt the dorsal digital v. and a.; supply to the skin

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33
Q

In the horse, if you want to target the digital n., where should you look?

A

On the plantar/palmar aspect

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34
Q

In the horse distal limb below the hock, what is the order from dorsal to plantar of the digital n., v., and a. that are located here?

A
Dorsal = digital vein
Middle = digital artery
Plantar = digital nerve
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35
Q

How is the thoracic limb oriented in comparison to the pelvic limb?

A

it is vertically-oriented whereas the pelvic limb is not

36
Q

What % of body weight is carried by the thoracic limb?

A

60%

37
Q

What are the functions of the thoracic limb?

A

Support trunk during gallop, shock absorption, and steering (thought to be)

38
Q

What species have a tuber of the scapular spine and how are they sized relatively?

A

pig (largest), horse (intermediate), ruminant (barely there)

39
Q

What species have an acromion process of the scapula?

A

dog and rmt

40
Q

What species have a cartilaginous margin to their scapula and what are the relative sizes?

A

From smallest to largest = dog, pig, horse, rmt

41
Q

What muscle inserts on the medial aspect of the scapula that has both thoracic and cervical parts? What is the function of this muscle?

A

serratus ventralis; thought to be important for shock absorption

42
Q

What muscle originates at the supraglenoid tubercle of the scapula?

A

biceps brachii

43
Q

What is the function of the cartilaginous margin of the scapula?

A

flexes for shock absorption

44
Q

What species have both cranial and caudal parts to the greater tubercle of the humerus?

A

pig, ox, horse

45
Q

What species have both cranial and caudal parts to the lesser tubercle of the humerus?

A

ox and horse

46
Q

What species have an intertubercular/bicipital groove?

A

dog, pig, cat, ox

47
Q

What species have an intertubecullar tubercle?

A

ox and horse

48
Q

What courses through the intertubecular/bicipital groove?

A

Tendon of the biceps brachii m.

49
Q

In what species do the radial fossa and olecranon fossa communicate and what feature of the humerus is unique to this species?

A

dog only; supratrochlear foramen

50
Q

What feature do the antebrachial bones of the large animal possess that restricts them to only flexion and extension?

A

Radius and ulna hava some fusion with each other, so these animals are not able to supinate or pronate their antebrachium

51
Q

What is a unique characteristic of the radius and ulna of the pig?

A

They are separate bones but are in close apposition bc they have a lot of c.t. bt them

52
Q

How many spaces does the ox have bt its radius and ulna?

A

2 (proximal and distal interosseus spaces)

53
Q

How many spaces does the horse have bt its radius and ulna?

A

1 (proximal interosseus space)

54
Q

In the large animal, what feature of the distal antebrachium still appears as a secondary ossification center even though the bones are fused?

A

lateral styloid process

55
Q

In the dog, what carpal bones are fused and what is this bone called?

A

radial and intermediate carpal bones –> intermedioradial carpal bone

56
Q

In the pig, what carpal bones are fused?

A

None; they are all separate

57
Q

In the ox, which carpal bones are fused?

A

2nd and 3rd carpal bones

58
Q

In the ox, which carpal bones are absent?

A

1st carpal bone only

59
Q

In the ox, if Mc 5 is present what does it look like?

A

It is a remnant

60
Q

In the horse, which carpal bones are fused?

A

None; they are all separate

61
Q

In the horse, which carpal bones are absent and with what frequency can they be present?

A

1st carpal bone (present 20-30% of the time)

5th carpal bone (present <20% of the time)

62
Q

In the horse, what muscle makes up the cranial margin of the shoulder?

A

subclavius m.

63
Q

What species have the subclavius m. and in which species is it largest?

A

pig and horse (large)

rmt (thin and strap-like)

64
Q

What covers the infraspinatus muscle in the large animal?

A

Aponeurosis of the deltoideus m.

65
Q

Which species only has the scapular part of the deltoideus m.?

A

horse

66
Q

Which species does not have the accessory head of the triceps brachii m.?

A

horse

67
Q

In the rmt, what heads of the triceps m. can be fused?

A

accessory and intermediate

68
Q

What is the insertion of the supraspinatus m.?

A

greater and lesser tubercles of the humerus

69
Q

How does the supraspinatus of the horse interact with the biceps brachii tenson?

A

tightly binds down the tendon

70
Q

What is the origin of the long head of the triceps brachii m.?

A

caudal border of scapula

71
Q

How does the insertion of the horse subclavius m. interact with the supraspinatus m.?

A

Part of the subclavius insertion is on the aponeurosis and fascia overlying the supraspinatus.

72
Q

In the horse, what is the superficial part of the biceps brachii m. called and what does it join with?

A

lacertus fibrosus; joins fascia over the extensor carpi radialis m.

73
Q

Do cattle have the lacertus fibrosus part of the biceps brachii?

A

Yes, but it is less developed than in the horse

74
Q

Where does the deep part of the biceps brachii insert?

A

radial tuberosity

75
Q

What species has a “true triceps” muscle?

A

Horse (only 3 heads)

76
Q

What does the horse’s biceps muscle have that bisects it?

A

Thick band of c.t.

77
Q

What innervates the muscles of the craniolateral antebrachium?

A

radial n.

78
Q

What innervates the muscles of the caudomedial antebrachium?

A

median n. +/- ulnar n.

79
Q

What is the origin and insertion of the extensor carpi radialis?

A

O: lateral epicondyle of the humerus
I: MC bones

80
Q

What is the origin and insertion of the common digital extensor?

A

O: lateral epicondyle of the humerus
I: digits (P2 and P3)

81
Q

What is the origin and insertion of the lateral digital extensor (thoracic limb)?

A

O: proximal radius and ulna
I: spp. specific

82
Q

What is the origin and insertion of the extensor carpi radialis/ulnaris lateralis?

A

O: lateral epicondyle of the humerus
I: carpal and MC bones

83
Q

What is the function of the extensor carpi ulnaris in the large animal and why?

A

It is a true flexor of the carpus due to larger component of insertion into the accessory carpal bone

84
Q

How many bellies does the common digital extensor of the pig have?

A

3 (medial, middle, lateral)

85
Q

How many bellies does the common digital extensor of the rmt have?

A

2 (medial and lateral)

86
Q

How many heads does the common digital extensor of the horse have?

A

3

87
Q

In the horse, what tendon comes off of the common digital extensor that joins the tendon of the lateral digital extensor at the hock?

A

tendon of Phillips from the radial head