Pelvic Limb 3 Flashcards Preview

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Flashcards in Pelvic Limb 3 Deck (28)
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1
Q

What two muscles of the crus share an origin and where is that origin?

A

Long digital extensor and peroneus tertius @ extensor fossa of distal femur

2
Q

Where does the long digital extensor insert and what are the relative strengths of insertion?

A

Proximal P1 = weakest
Proximal P2 = stronger than P1
Proximal P3 = strongest

3
Q

Where does the peroneus tertius m. insert in the horse?

A

Lateral tendon –> 4th tarsal bone/calcaneus

Medial tendon –> Proximal MT 3 (superficial) and 3rd tarsal bone (deep)

4
Q

Where does the cranial tibial m. insert in the horse?

A

Lateral tendon –> Proximal MT 3 (superficial) and 3rd tarsal bone (deep)
Medial tendon –> Fused 1st and 2nd tarsal bones

5
Q

What is another name for the medial tendon of the cranial tibial m. and what lays deep to it?

A

cunean tendon; cunean bursa is deep

6
Q

Where does the suspensory ligament originate?

A

3rd MC/MT

7
Q

What is another name for the suspensory ligament?

A

interosseus

8
Q

Where is the suspensory ligament located in relation to other structures (depth-wise)?

A

It is the deepest soft-tissue structure on the palmar aspect, sits right up against the cannon bone and is deep to the SDF and DDF tendons.

9
Q

What passes through the proximal scutum?

A

digital flexor tendons

10
Q

What is the purpose of the palmar/plantar annular ligament?

A

Helps tether the tendons in place

11
Q

Where does the suspensory ligament insert?

A

Splits into 2 limbs to insert on the proximal sesamoids

12
Q

Which way do the extensor branches of the accessory ligament run and what do they join with?

A

Are given off just prior to insertion, run from palmar/plantar aspect to dorsal aspect;
Join tendon of long digital extensor (pelvic) or common digital extensor (thoracic)

13
Q

What is the origin and insertion of the short and cruciate sesamoidean ligaments?

A

O: proximal sesamoids
I: bony ridge of P1

14
Q

What is the origin and insertion of the oblique sesamoidean ligaments?

A

O: proximal sesamoids
I: bony ridge of P1

15
Q

What is the origin and insertion of the straight sesamoidean ligament?

A

Superficial part -
O: proximal sesamoid
I: proximal P2

Deep part -
O: proximal sesamoid
I: bony ridge of P1

16
Q

How many degrees of extension/flexion does the fetlock joint have?

A

220

17
Q

How many degrees of extension/flexion does the pastern joint have?

A

10-20

18
Q

How many degrees of extension/flexion does the coffin joint have?

A

40-60

19
Q

Where is the dorsal fetlock pouch located?

A

Bt digital extensor tendon and cannon bone

20
Q

Where is the palmar/plantar fetlock pouch located?

A

Bt suspensory ligament and cannon bone

21
Q

What is the digital sheath?

A

Synovial sheaths that surround the DDF and SDF tendons

22
Q

What aspects of the fetlock joint have articular cartilage?

A

Distal cannon bone, proximal P1, dorsal surface of proximal sesamoids

23
Q

In the rmt, where does the medial tendon of the common/long digital extensor m. insert?

A

P2 and P3 of digit 3

24
Q

In the rmt, where does the lateral tendon of the common/long digital extensor m. insert?

A

P3 of digits 3 and 4

25
Q

In the rmt, where does the lateral digital extensor tendon insert?

A

P2 and P3 of digit 4

26
Q

Where is the proximal interdigital ligament found in the rmt?

A

P1 between digits 3 and 4

27
Q

At what point in the rmt foot do the digits separate?

A

Distal to the fetlock joint

28
Q

Why is it important to know where the rmt digits separate?

A

If the foot has an infection such as foot rot, you need to know where the digits are no longer separate because it will affect whether you need to amputate one claw or both.