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Large Animal Anatomy Midterm > Nerve supply of the Pelvic Limb lecture > Flashcards

Nerve supply of the Pelvic Limb lecture Flashcards

1
Q

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

A

distal limb

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2
Q

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

A

ventral primary branches

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3
Q

What kind of nerves leave the lumbosacral plexus?

A

named peripheral nerves

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4
Q

What is the spinal nerve origin of the Femoral nerve?

A

L4-L6

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5
Q

What is the spinal nerve origin of the Obturator nerve?

A

L4-L6

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6
Q

What is the spinal nerve origin of the Sciatic nerve?

A

L6-S2

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7
Q

What is the spinal nerve origin of the Pudendal nerve?

A

S2-S4

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8
Q

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

A

Femoral and Obturator

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9
Q

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

A

Sciatic

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10
Q

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

A

pudendal

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11
Q

What is the most important muscle of the pelvic limb?

A

Quadriceps femoris

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12
Q

What is the nerve that innervates Quadriceps femoris?

A

the femoral n.

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13
Q

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

A

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

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14
Q

What artery does the femoral nerve run with?

A

Lateral circumflex femoral a.

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15
Q

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

A

Innervates flexors of the hip and extensors of the stifle

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16
Q

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

A

saphenous n.

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17
Q

Who does the obturator nerve supply?

A

Adductors of the hip

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18
Q

Does the obtorator n. supply the skin?

A

no skin innervation

19
Q

What is an example of obturator n. damage?

A

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

20
Q

What does the cranial gluteal nerve supply?

A

abductors of the hip and the tensor fasciae latae m.

21
Q

Does the cranial gluteal n. supply skin?

A

no

22
Q

What does the caudal gluteal n.supply?

A

extensors of the hip and abductors of the hip

23
Q

Does the caudal gluteal innervate the skin and joints?

A

no

24
Q

What is the biggest nerve of the hindlimb?

A

sciatic

25
Q

What are the 2 branches of the sciatic n.?

A

tibial and common peroneal n.

26
Q

What is the function of the sciatic n?

A

flex stifle

flex/ext hock and digits

27
Q

Does the sciatic innervate skin? Where?

A

yes

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

28
Q

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

A

poor limb flexion

knuckled over at digit

29
Q

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

A

tibial n.

30
Q

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

A

caudal cutaneous sural n.

31
Q

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

A

medial and lateral plantar nerves

32
Q

What is the function of the tibial n?

A

flex stifle
extend tarsus
flex digit

33
Q

What would damage to the tibial n. present like?

A

dropped hock, can’t extend hock or flex digit

34
Q

What major nerve gives rise to the common peroneal?

A

sciatic

35
Q

What are the divisions off the common peroneal n?

A

sup and deep peroneal

36
Q

What does the common peroneal nerve do?

A

flex tarsus

extend digit

37
Q

What would damage to the common peroneal nerve do?

A

Can’t flex tarsus and extend digit

knuckling/can’t flip foot over

38
Q

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?

A

superficial peroneal nerve off of the common peroneal n.

39
Q

What nerve innervates the tarsal joint?

A

deep peroneal n

40
Q

What nerve innervates the fetlock joint?

A

med/lat dorsal metatarsal nerves

med/lat plantar nerves

41
Q

What nerves innervate the pastern and coffin joints?

A

plantar=med/lat plantar digital nerves (from tibia)

dorsal=med/lat dorsal digital nerves (from peroneal)

42
Q

What happened to a horse with Stringhalt?

A

ingestion of a specific toxic plant

43
Q

How do you help a horse with Stringhalt?

A

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

Large Animal Anatomy Midterm (6 decks)

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