Lecture 6: Nerve Supply of the Pelvic Limb

Question 0

femoral n.

Answer 0

spinal nerve origin: L4-L6

Question 1

the lumbosacral plexus

Answer 1

intermingling of the ventral primary branches of spinal nerves L4-S4

Question 2

obturator n. spinal nerve origin:

Answer 2

L4-L6

Question 3

cranial gluteal spinal nerve origin

Answer 3

L6-S1

Question 4

caudal gluteal spinal nerve origin

Answer 4

S1-S2

Question 5

caudal cutaneous femoral spinal nerve origin

Answer 5

S1-S2

Question 6

sciatic n. (tibial + common peroneal) spinal nerve origin

Answer 6

L6-S2

Question 7

pudendal spinal nerve origin

Answer 7

S2-S4

Question 8

obturator n.

Answer 8

• strictly MUSCULAR
  M: adductors of the hip (ext. obt., pectineus, adductor, gracilis)
  S: no skin innervation
  J: part of hip and stifle joint
  clinical signs: non-compensated abduction of the limb. the cow will go into a split

Question 9

femoral n.

Answer 9

• L4-L6
• MIXED nerve
• in femoral triangle
• M: flexors of hip (iliopsoas, rectus femoris) and extensors of stifle (quadriceps femoris)
• S/J: supplies saphenous, skin of MEDIAL thigh, medial crus and dorsomedial skin of tarsus and metatarsus. part of hip and stifle joints
• cut = collapse of stifle, inability to stand because of quad fem. paralysis

Question 10

caudal gluteal n.

Answer 10

M: supplies extensors of hip (biceps femoris, gluteus medius, semitendinosus) and abductors of the hip
S/J: none
clinical signs: a little alteration in gait

Question 11

sciatic n.

Answer 11

MIXED
M: supplies most hindlimb muscles including flexors of the stifle (biceps femoris, semitendinosus, popliteus, gastrocnemius), extensors and flexors of the tarsus and extensors and flexors of the digit
S/J: almost all skin from the stifle down to the hoof (except a medial strip innervated by the saphenous n.)
clinical signs: poor limb flexion, stifle extended, tarsus extended, weight born on dorsal surface of digit with fetlock overflexed, analgesia of lateral limb and entire foot

Question 12

Tibial n.

Answer 12

M: supplies flexors of the stifle (popliteus, gastrocnemius), extensors of the tarsus (gastronemius, soleus, superficial and deep digital flexors) and flexors of the digit (superficial and deep digital flexor)
S/J: caudolateral skin from stifle to hoof. supplies the stifle joint, plantar aspects of fetlock, pastern and coffin joints and navicular bursa
clinical signs: hypermetric gait with “dropped hock” (hyperflexion of tarsus at rest), inability to flex digit, analgesia of plantar metarsus and digit

Question 13

common peroneal nerve

Answer 13

M: supplies flexors of the tarsus (long and lateral digital extensors, tibialis cranialis) and extensors of the digit (long and lateral digital extensors)
S/J: skin over dorsolateral surface of the crus and pes, tarsal joints, fetlock joint and dorsal portions of pastern and coffin joints
clinical signs: inability to flex the tarsus and extend the digit, will show hyperextension of the hock and hyperflexion of the digit, fetlock knuckles during walking and toe is dragged. analgesia of dorsolateral pes from the tarsus to the fetlock.

Question 14

cranial gluteal n.

Answer 14

M: supplies heads of gluteal muscle (abductor of the hip) and tensor fasciae latae muscle
S/J: no skin, part of hip joint
clinical signs: little alteration in gait, atrophy of middle glute.

Question 15

joint innervation to the hip joint

Answer 15

femoral, obturator, cranial gluteal and sciatic nerves

Question 16

joint innervation of the stifle joint

Answer 16

femoral
obturator
tibial

Question 17

joint innervation of the tarsal joint

Answer 17

deep peroneal nerve

Question 18

joint innervation of the fetlock joint

Answer 18

med and lat dorsal metatarsal nerves, med and lat plantar nerves

Question 19

pastern and coffin joints

Answer 19

plantar aspect - medial and lateral plantar digital nerves

dorsal aspect - medial and lateral dorsal digital nerves

Question 20

navicular bursa

Answer 20

medial and lateral plantar digital nerves