Lab 3

Question 1

Identify this structure:

Answer 1

cerebellar hemisphere

Question 2

Identify this structure:

Answer 2

vermis

Question 3

Identify this structure:

Answer 3

flocculonodular lobe

Question 4

Identify this structure:

Answer 4

cerebellar peduncles

Question 5

Identify this structure:

Answer 5

nodulus

Question 6

Identify this structure:

Answer 6

flocculus

Question 7

Identify this structure:

Answer 7

flocculonodular peduncle

Question 8

Identify this structure:

Answer 8

cerebellar peduncles

Question 9

Identify this structure:

Answer 9

fourth ventricle

Question 10

Identify this structure and what is its function?

Answer 10

fasciculus cuneatus; ascending sensory tract for proprioception and touch

Question 11

Identify this structure and what is its function?

Answer 11

spinal tract of the trigeminal nerve; descending sensory tract for facial pain and temp

Question 12

Identify this structure and what nerve communicates with is?

Answer 12

vestibular nuclei; vestibulocochlear nerve

Question 13

Identify this structure:

Answer 13

medulla

Question 14

Identify this structure:

Answer 14

pons

Question 15

What are the cerebellar peduncles?

Answer 15

structures that connect the cerebellum with the rest of the CNS

Question 16

Which side of the body will be affected by a lesion of the right cerebellum?

Answer 16

right side

Question 17

Identify this structure and what nerve originates from this?

Answer 17

pons; trigeminal nerve

Question 18

Identify this structure:

Answer 18

medulla oblongata

Question 19

Identify this structure, what nerve originates from it, and what type of structure is it?

Answer 19

trapezoid body, facial and vestibulocochlear nerves, and an auditory structure

Question 20

Identify this structure and what is its function?

Answer 20

pyramid; descending motor tract

Question 21

Identify this structure:

Answer 21

pyramid decussation

Question 22

Identify this structure:

Answer 22

CN V

Question 23

Identify this structure:

Answer 23

CN VI

Question 24

Identify this structure:

Answer 24

CN VII

Question 25

Identify this structure:

Answer 25

CN VIII

Question 26

Identify this structure:

Answer 26

CN IX

Question 27

Identify this structure:

Answer 27

CN X

Question 28

Identify this structure:

Answer 28

CN XI

Question 29

Identify this structure:

Answer 29

CN XII

Question 30

What nucleus gives rise to the hypoglossal nerve?

Answer 30

hypoglossal nucleus

Question 31

Where is the hypoglossal nucleus located?

Answer 31

medulla oblongata

Question 32

What is the function of the genioglossus muscle?

Answer 32

protrusion of the tongue

Question 33

Which dog suffers fro the chronic lesion of the CN XII?

Answer 33

dog b

Question 34

In a dog with an early unilateral lesion of the hypoglossal nerve, the tongue of a resting or panting dog deviates to which side?

Answer 34

the normal side

Question 35

In a dog with an early unilateral lesion of the hypoglossal nerve, the tongue of a licking dog deviates to which side?

Answer 35

lesioned side

Question 36

In a dog that has a chronic unilateral lesion of the hypoglossal nerve, which direction will the tongue of a resting or paning dog deviate towards?

Answer 36

the lesioned side

Question 37

In a dog that has a chronic unilateral lesion of the hypoglossal nerve, which direction will the tongue of a licking dog deviate towards?

Answer 37

the lesioned side

Question 38

Where do fibers of the pyramid originate?

Answer 38

cerebral cortex

Question 39

What is the function of the pyramid

Answer 39

carries motor fibers that play a role in precise and learned voluntary movements

Question 40

Identify this structure:

Answer 40

pontine tegmentum

Question 41

Identify this structure:

Answer 41

mid-brain tegmentum

Question 42

Identify this structure:

Answer 42

basilar pons

Question 43

Identify this structure:

Answer 43

pons

Question 44

Identify this structure:

Answer 44

tegmentum

Question 45

Identify this structure:

Answer 45

basilar pons

Question 46

Identify this structure:

Answer 46

cerebellum

Question 47

Identify this structure:

Answer 47

tectum

Question 48

Identify this structure:

Answer 48

cerebrum

Question 49

Identify this structure:

Answer 49

olfactory bulb

Question 50

Identify this structure:

Answer 50

thalamus

Question 51

Identify this structure:

Answer 51

hypothalamus

Question 52

Identify this structure:

Answer 52

cerebral aqueduct

Question 53

Identify this structure:

Answer 53

corpus callosum

Question 54

Identify this structure:

Answer 54

anterior commissure

Question 55

If an animal shows a loss of balance and right facial paralysis, what area of the brain is most likely involved?

Answer 55

trapezoid body

Question 56

If you see paresis of the left limbs and medial strabismus of the right eye, what area of the brain is most likely involved?

Answer 56

medulla oblongata (pyramid and abducent)

Question 57

If touching the medial canthus does not induce eye blinking, what nerve(s) could be injured?

Answer 57

facial nerve or trigeminal nerve

Question 58

Where is the lesion if a dog shows a loss of facial tone and dropped lip on the right side?

Answer 58

right facial

Question 59

Where is the lesion if a dog tends to fall on the right side?

Answer 59

on the right side - either on the right vestibulocochlear nerve or right cerebellar hemisphere (they are in constant communication)

Question 60

A patient shows slow onset of hearing loss in the right ear. MRI suggests shwannoma of the right facial nerve in the cranium. If this condition is allowed to progress, what other clinical signs could potentially develop with time?

Answer 60

paresis of muscles of facial expression