hind limb innervation

Question 1

what is the most common clinical signs associated with compromised motor innervation

Answer 1

weakness in lower legs
muscle atrophy
gait defects

Question 2

what is the most common clinical signs associated with compromised sensory innervation

Answer 2

loss of sensation

weak/ loss of withdrawal reflexes

Question 3

lumbosacral plexus

Answer 3

L4-S2

gives rise to nerves that innervate the hindlimb

Question 4

L3 gives rise to :

Answer 4

illioinguinal and genitofemoral

Question 5

Genitofemoral has two branches,:

Answer 5

femoral and genital branch
femoral innervated cutaneous innervation to proximal medial thigh
genital branch innervates spermatic fascia, cremaster m. , and scrotum

Question 6

lateral cutaneous femoral n. innervates ?

Answer 6

provides sensory innervation to the craniolateral surface of the thigh
Runs with interns illiac artery

Question 7

femoral n. provides motor and sensory innervation to what ?

Answer 7

motor innervation to extensors of the stifle(quadriceps)

sensory innervation to the medial surface of the thigh, stifle, and tarsus through the saphenous branch

Question 8

if the femoral nerve is damaged :

Answer 8

paralysis of the quadriceps
loss of weight bearing
loss of sensation on the medial surface of the limb

Question 9

obturator neve innervates

Answer 9

adductor muscles of thigh

adductor, pectineus, gracilis

Question 10

if obturator nerve is damaged:

Answer 10

animal cannot adduct limbs , limbs remain abducted , esp in large animals/calving

Question 11

the lumbosacral trunk includes:

Answer 11

cranial gluteal, caudal gluteal, caudal cutaneous femoral

Question 12

cranial gluteal innervates :

Answer 12

tensor fascia lata, middle and deep gluteal

Question 13

caudal gluteal innervates :

Answer 13

superficial gluteal muscles &hamstring muscles

Question 14

sciatic nerve branches

Answer 14

common peronal and tibial

Question 15

tibial nerve provides what kind of innervation

Answer 15

sensory innervation to planter surface of hind paw

Question 16

sciatic nerve can be damaged from :

Answer 16

fracture of pelvis or femur
dislocation of hip
injections
trauma

Question 17

common peroneal n. has two branches

Answer 17

superficial and deep branch
superficial innervates skin/dorsal surface ion leg and foot
deep branch supplies the carpus flexors and digit extensors

Question 18

if common peroneal n is damaged

Answer 18

overextension of the carpus 
over flexion of  the digits 
atrophy to innervated muscles
dog flicks paw forward to bear weight
lost sensation on dorsal tarsus and hind paw

Question 19

if tibial nerve is damaged

Answer 19

over flexion of carpus
overextension of digits 
atrophy to innervated muscles 
limb is lowered when applying weight 
lost sensation on plantar aspect of tarsus and foot

Question 20

pudendal nerve has two branches

Answer 20

superficial branch supplies the skin of anus, vulva, ventral perineal region
deep branch supply motor nerves to perineal muscles that include repro organs
main trunk provides sensory innervation to prepuce, scrotum, udder

Question 21

caudal rectal nerves

Answer 21

provide sensory innervation to rectum, anus, perineal skin

provides motor fibers to dorsal perineal muscles (external anal sphincter and levator ani)