Nerve supply of the Pelvic Limb lecture

Question 1

Where is there a significant difference in horse hindlimb vs dog?

Answer 1

distal limb

Question 2

What branches of the spinal nerve contribute to the lumbosacral plexus?

Answer 2

ventral primary branches

Question 3

What kind of nerves leave the lumbosacral plexus?

Answer 3

named peripheral nerves

Question 4

What is the spinal nerve origin of the Femoral nerve?

Answer 4

L4-L6

Question 5

What is the spinal nerve origin of the Obturator nerve?

Answer 5

L4-L6

Question 6

What is the spinal nerve origin of the Sciatic nerve?

Answer 6

L6-S2

Question 7

What is the spinal nerve origin of the Pudendal nerve?

Answer 7

S2-S4

Question 8

What named peripheral nerves have an origin at L4-L6?

Answer 8

Femoral and Obturator

Question 9

What named peripheral nerve has an origin at L6-S2?

Answer 9

Sciatic

Question 10

What named peripheral nerve has an origin at S2-S4?

Answer 10

pudendal

Question 11

What is the most important muscle of the pelvic limb?

Answer 11

Quadriceps femoris

Question 12

What is the nerve that innervates Quadriceps femoris?

Answer 12

the femoral n.

Question 13

What would happen if there was no innervation from the femoral nerve?

Answer 13

quadriceps would not get stimulated and the animal would be unable to stand

Question 14

What artery does the femoral nerve run with?

Answer 14

Lateral circumflex femoral a.

Question 15

What type of actions/muscle groups to the limb does the femoral nerve do?

Answer 15

Innervates flexors of the hip and extensors of the stifle

Question 16

What is the branch off the femoral nerve that innervates the medial skin and joints?

Answer 16

saphenous n.

Question 17

Who does the obturator nerve supply?

Answer 17

Adductors of the hip

Question 18

Does the obtorator n. supply the skin?

Answer 18

no skin innervation

Question 19

What is an example of obturator n. damage?

Answer 19

Calving paralysis. Go down in a split because they can’t adduct the limb

Question 20

What does the cranial gluteal nerve supply?

Answer 20

abductors of the hip and the tensor fasciae latae m.

Question 21

Does the cranial gluteal n. supply skin?

Answer 21

no

Question 22

What does the caudal gluteal n.supply?

Answer 22

extensors of the hip and abductors of the hip

Question 23

Does the caudal gluteal innervate the skin and joints?

Answer 23

no

Question 24

What is the biggest nerve of the hindlimb?

Answer 24

sciatic

Question 25

What are the 2 branches of the sciatic n.?

Answer 25

tibial and common peroneal n.

Question 26

What is the function of the sciatic n?

Answer 26

flex stifle | flex/ext hock and digits

Question 27

Does the sciatic innervate skin? Where?

Answer 27

yes | almost all the skin from stifle to hock (minus medial strip supplied by the saphenous branch from femoral)

Question 28

What would happen if there was damage to the sciatic nerve?

Answer 28

poor limb flexion | knuckled over at digit

Question 29

What is the caudal division of the sciatic nerve that passes between the heads of the gastrocnemius?

Answer 29

tibial n.

Question 30

What is the branch off the sciatic that innervates cutaneous tissue?

Answer 30

caudal cutaneous sural n.

Question 31

The tibial nerve divides just proxiaml to the tarsus into what 2 branches?

Answer 31

medial and lateral plantar nerves

Question 32

What is the function of the tibial n?

Answer 32

flex stifle extend tarsus flex digit

Question 33

What would damage to the tibial n. present like?

Answer 33

dropped hock, can't extend hock or flex digit

Question 34

What major nerve gives rise to the common peroneal?

Answer 34

sciatic

Question 35

What are the divisions off the common peroneal n?

Answer 35

sup and deep peroneal

Question 36

What does the common peroneal nerve do?

Answer 36

flex tarsus | extend digit

Question 37

What would damage to the common peroneal nerve do?

Answer 37

Can't flex tarsus and extend digit | knuckling/can't flip foot over

Question 38

If a horse is in lateral recumbancy for an extended period of time, what nerve would be responsible for the pressure asphyxia to the hind limb of affected side?

Answer 38

superficial peroneal nerve off of the common peroneal n.

Question 39

What nerve innervates the tarsal joint?

Answer 39

deep peroneal n

Question 40

What nerve innervates the fetlock joint?

Answer 40

med/lat dorsal metatarsal nerves | med/lat plantar nerves

Question 41

What nerves innervate the pastern and coffin joints?

Answer 41

plantar=med/lat plantar digital nerves (from tibia) | dorsal=med/lat dorsal digital nerves (from peroneal)

Question 42

What happened to a horse with Stringhalt?

Answer 42

ingestion of a specific toxic plant

Question 43

How do you help a horse with Stringhalt?

Answer 43

Sx resection of the lat digital ext tendon OR cut peroneal n.