Assignment 13 (Equine)

Question 1

What is the most lateral splint bone?

Answer 1

MC IV

Question 2

What are the buttons of the metacarpus and are they palpable?

Answer 2

distal most portion of the splint bones; they are palpable

Question 3

What sesamoidean bone is absent in the horse?

Answer 3

Dorsal sesamoid

Question 4

O, A, I, and bursa of CDE

Answer 4

O: lateral epicondyle of the humerus

I: extensor process of the distal phalanx & proximal and middle phalannx (dorsal surface)

A: extend carpal and digital joints; flexes the elbow joint

bursa: at the fetlock joint; between its tendon and the fetlock joint capsule

Question 5

What other tendons join the CDE?

Answer 5

extensor tendons from the susensory ligament to its tendon

Question 6

The CDE is invested with a ______ _____, bound by the ______ ______. What other tendon also fits this?

Answer 6

synovial sheath; extensor retinaculum

LDE

Question 7

What groove of the radius does the CDE pass through?

Answer 7

the lateral groove

Question 8

What is the action of LDE?

Answer 8

extends the carpal and digital joints (fetlock and pastern)

Question 9

O, A, I, and bursa of SDF

Answer 9

O: medial epicondyle of the humerus

I: middle phalanx and proximal phalanx

A: flexes the carpal and digital joint (fetlock, pastern), extends the elbow joint

No bursa

Question 10

What are the structures associated with SDF?

Answer 10

proximal check ligament, carpal synovial sheath, manica flexoria, palmar annular ligament of the fetlock, proximal digital annular ligament

Question 11

O, A, I, and bursa of DDF

Answer 11

O: medial epicondyle of the humerus

I: distal phalanx

A: flexes the carpal and digital joints, extends the elbow joint

Question 12

What are the heads of DDF?

Answer 12

humeral, radial, and ulnar heads

Question 13

What is the carpal synovial sheath?

Answer 13

sheath formed by SDF around DDF as they pass through the carpal canal; bound by flexor retinaculum

Question 14

What structures are associated with the DDF?

Answer 14

carpal synovial sheath, distal check ligament, distal digital annular ligament, navicular bursa

Question 15

What structure is a direct contunuation of the palmar carpal ligament?

Answer 15

Distal check ligament of the DDF

Question 16

What are the branches of the medial palmar artery?

Answer 16

medial palmar digital a.

lateral palmar digital a.

Question 17

What does the median artery bifurcate into?

Answer 17

medial palmar a.

lateral palmar a.

Question 18

The radial artery is a branch of what main artery?

Answer 18

median a.

Question 19

Where is the metacarpal tuberosity located?

Answer 19

proximal end of MC III

Question 20

The third metacarpal bone is the only weight bearing metacarpal bone. True or false?

Answer 20

True

Question 21

Common name of MC III?

Answer 21

cannon bone

Question 22

The proximal phalanx contains the solar foramen and solar canal. True or false?

Answer 22

False; the proximal phalanx is a roughened triangular area for dital sesamoiden ligaments.

Question 23

The distal phalanx contains the solar foramen and solar canal. True or false?

Answer 23

True

Question 24

What shaped is the proximal digital annular ligament?

Answer 24

x-shaped

Question 25

Manica flexor is associated with what muscled tendon?

Answer 25

SDF

Question 26

What are the branches of the medial and lateral palmar digital arteries?

Answer 26

arteries of the P1 (dorsal and palmar branches) arteries of PII (dorsal and palmar branches) arteries of PIII (dorsal branches)

Question 27

What are the branches of the medial palmar nerve?

Answer 27

dorsal branch and medial palmar digital nerve

Question 28

What are the branches of the lateral palmar nerve?

Answer 28

dorsal branch and lateral palmar digital nerve

Question 29

What is the common name of the 4th MC bone?

Answer 29

splint bone

Question 30

The solar canal is found on which phalanx?

Answer 30

Distal, P3

Question 31

The proximal check ligament fuses with which muscle tendon?

Answer 31

SDF

Question 32

Which muscle tendon forms the manica flexoria?

Answer 32

SDF

Question 33

Name the heads of the DDF muscle.

Answer 33

Humeral, radial, ulnar heads

Question 34

Just proximal to the fetlock joint, the ______ artery divides into the medial palmar digital artery and the lateral palmar digital artery.

Answer 34

Medial palmar artery

Question 35

What nerve gives off the lateral palmar digital nerve directly?

Answer 35

lateral palmar nerve from the median nerve