Lecture 22

Question 1

motor forelimb

cranial pectoral nerve

Answer 1

C6,7,8

superficial pectoral

Question 2

motor forelimb

suprascapular

Answer 2

C6,7

• lateral muscles of shoulder and scapula
• stabilizers, flexors and extensors of shoulder
• supraspinatus, infraspinatus

Question 3

motor forelimb

muscluloculatenous

Answer 3

C6, 7, 8

• cranial muscles of the arm
• flexors of elbow, extensors of the shoulder
• biceps brachii, coracobrachialis, brachialis

Question 4

motor forelimb

axillary

Answer 4

C7, 8

• caudal muscles of scapula and shoulder
• flexors of the shoulder
• deltoideus, teres major and minor, (subscapularis)

Question 5

motor forelimb

RADIAL

Answer 5

C7,8,T1

• caudal muscles of arm
• extensors of elbow - triceps brachii
• cranial muscles of forearm
• carpal and digital extensors

Question 6

motor forelimb

median and ulnar

Answer 6

C8, T1

• caudal muscles of forearm
• carpal and digital flexors

Question 7

sensory forelimb

axillary

Answer 7

C7,8

lateral brachium and caudal scapular region

Question 8

sensory forelimb

musclulocutaneous

Answer 8

C6,7,8

medial brachium and antebrachium

Question 9

sensory forelimb

RADIAL

Answer 9

C7,8T1
lateral antebrachium and manus, dorsal surface of the paw
-dorsal skin over digits 3 and 4

Question 10

sensory forelimb

median and ulnar

Answer 10

C8 T1
palmar surface of the paw
median- palmar skin over digits 2 and 3
ulnar- skin over abaxial digit 5

Question 11

all spinal nerves caudal to T1 exit spinal cord ______ to the vertebrae for which they are named

Answer 11

caudal

Question 12

motor hindlimb

obturator

Answer 12

L4,5,6

adductor muscles- external obturator, pectineus, gracilis, adductor

Question 13

motor hindlimb

femoral

Answer 13

L4,5,6

quadriceps, hip flexors, stifle extenders, iliopsoas, sartoriuss

Question 14

motor hindlimb
common peroneal
(branch of sciatic)

Answer 14

L6,7

flexors of the tarsus, extensors of the digits

Question 15

motor hindlimb
tibial
(branch of sciatic)

Answer 15

L7, S1

extensors of the tarsus and flexors of the digits

Question 16

motor hindlimb
pudendal
(branch of sciatic)

Answer 16

S1,2,3

external anal sphincter

Question 17

motor hindlimb

sciatic

Answer 17

L6,7 S1,2

hamstrings

Question 18

sensory hindlimb

femoral- saphenous

Answer 18

medial leg (thigh to paw- stifle to tarsus)

Question 19

sensory hindlimb

sciatic

Answer 19

lateral and caudal surface of the crus
dorsal paw
plantar paw

Question 20

define cutaneous zone

Answer 20

total region of skin innervation by one spinal nerve- usually overlapping with innervation of other spinal nerves

Question 21

define autonomous zone

Answer 21

area that only one spinal nerve innervates- smaller than cutaneous

Question 22

what clinical signs would you see if the radial nerve was damaged

Answer 22

issues with triceps brachii
carpal and digital extensors(cranial muscles of forearm)
no feeling on dorsal surface of the paw

Question 23

what CS would you see if the obturator nerve was damaged

Answer 23

issues with adduction of the hindlimb

Question 24

what CS would you see if the femoral nerve was damaged

Answer 24

issues with the quadriceps

and feeling to medial leg (thigh to paw)