Neuroal Anatomy Pns

Front 1

How many pairs of spinal nerves does a dog have?

Back 1

Spinal nerves are the nerves that leave or enter the spinal cord.
A dog usually has 36 pairs of spinal nerves

Front 2

How many pairs of spinal nerves in a dog are asociated with each section of the cord?

Back 2

Cranial spinal nerves: 8pairs (C1-C8)

Thoracic spinal nerves : 13pairs (T1-T13)

Lumbar spinal nerves: 7 paris (L1-L7)

Sacral spinal nerves: 3 pairs (S1-S3)

Caudal spinal nerves: 5 pairs (Ca1-Ca5)

Front 3

Write short notes on the anatomy of a typical spinal nerve

Back 3

Dorsal root (with spinal ganglia) & ventral root fuse at the level of the intervertebral foramen to foram the short proper spinal nerve which quickly divides into the dorsal (supplying the epaxial muscle & skin) and ventral branches (supplying the hypaxial mm & skin). In thoracic & craninal lumbar regions, there are ramus communicans which connects the ventral branch of the spinal nerve with the sympathetic trunk)

Front 4

What is the difference between autonomous zone and cutaneous zone?

Back 4

Cutaneous zone is an area of skin innervated by one peripheral nerve - there is often considerable overlap of adjacent cutaneous zones
Autonomous zone is innervated by only one peripheral nerve

Front 5

What are the autonomous zomes of the canine forepaw?

Back 5

dorsal:skin over digits Ⅲ & Ⅳ　for radial nerve
palmer: skin over digits Ⅱ & Ⅲ　for median nerve
lateral: skin over abaxial digit Ⅴ for ulnar nerve

Front 6

What are the autonomous zomes of the canine hindpaw?

Back 6

dorsal:skin over digits 2, 3, & 4 for peroneal nerve
plantar: skin over digits 2 & 3 for tibial n
medial: skin of medial leg for saphenous

Front 7

What spinal nerves contribute to brachial plexus?

Back 7

(C5), C6, C7, C8, T1 (T2)
Brachal plexus=the mixed bundle of nerves, derived from the ventral branches of some cervical & thoracic spinal nerves, & innervating the thoracic limb

Front 8

What spinal nerves contribute to the lumbosacral plexus?

Back 8

L4,L5,L6,L7,S1,S2,S3
the lumbosacral plexus arises from the ventral branches of the caudal lumbar and the sacral nerves

Front 9

What clinical signs would you expect to see if the following nerves were damaged?
a) radial nerve
b) obturator nerve
c) femoral nerve

Back 9

a)No response when touch dorsal part of skin over digits 3&4.

b)

c)No response to stimulus to proximal medial thigh

Front 10

What nerves are associated with the pharynx and larynx?

Back 10

Pharynx: sensory-Ⅸ
musculature-Ⅸ & Ⅹ
Larynx: sensory-Ⅹ & ⅩⅠ
musculature-Ⅹ & ⅩⅠ

Front 11

What three nerves come off the brain stem together and may be involved in one lesion because of their proximity to each other?

Back 11

CN Ⅴ,Ⅶ,Ⅷ

Front 12

What nerves carry the following sensory information into the CNS?
a)vision
b)balance & hearing
c)olfaction

Back 12

a) CNⅡ　(Optic n)
b) CNⅧ (Vestibulocochlear)
c) CNⅠ (Olfactory n)

Front 13

What branch(es) of the trigeminal nerve supply motor innervation to the muscles of mastication?

Back 13

Mandibular branch
(other two branches; ophthalmic & maxillary are purely sensory)

Front 14

What branch(es) of the trigeminal nerve supply facial sensation?

Back 14

All

Front 15

What is the main function of cranial nerve Ⅶ?

Back 15

=Facial n

-Taste on rostral 2/3 of tongue
-Motor to muscles of facial expression
-Parasympathetic to mandibular, sublingual, palatine, nasal, lacrimal glands

Front 16

Which cranial nerve supplies the muscles of the tongue?

Back 16

CNⅩⅡ (hypoglossal n)

*Taste on tongue: CNⅦ,Ⅸ&Ⅹ

Front 17

What does the spinal accessory nerve supply?

Back 17

motor to trapezius and brachiocephalicus muscles

Front 18

Which nerve provides the efferent arm of the pupillary light reflex?

Back 18

CNⅢ　(oculomotor)

Front 19

Which three cranial nerves are purely sensory?

Back 19

CNⅠ,Ⅱ,Ⅷ