Lab 2

Question 1

Identify this structure:

Answer 1

Caudate nucleus

Question 2

Identify this structure:

Answer 2

thalamus

Question 3

Identify this structure and what type of information is sent here?

Answer 3

lateral geniculate nucleus of the thalamus; visual information

Question 4

Identify this structure and what type of information is sent here?

Answer 4

medial geniculate nucleus of the thalamus; auditory information

Question 5

Identify this structure:

Answer 5

white matter

Question 6

Identify this structure:

Answer 6

grey matter

Question 7

Identify this structure:

Answer 7

Caudate nucleus

Question 8

Identify this structure:

Answer 8

corpus callosum

Question 9

Identify this structure:

Answer 9

internal capsule

Question 10

Identify this structure:

Answer 10

thalamus

Question 11

Identify this structure:

Answer 11

Caudate nucleus

Question 12

Identify this structure:

Answer 12

corpus callosum

Question 13

Identify this structure:

Answer 13

internal capsule

Question 14

Identify this structure:

Answer 14

thalamus

Question 15

Identify this structure:

Answer 15

hypothalamus

Question 16

What is the functional difference between the corpus callosum and the internal capsule?

Answer 16

The internal capsule brings information from the cerebrum to the corpus callosum which then communicates it with the opposite side of the brain

Question 17

In humans, an experimental surgery that transplants dopamine producing cells into the caudate nucleus is performed to improve some patients Parkinson’s disease. If you were to practice this surgery on a dog, how would you surgically access the caudate nucleus with minimal damage to other neural tissues?

Answer 17

sever the corpus callosum in half

Question 18

Identify this structure and what is it in charge of?

Answer 18

rostral colliculus; visual reflex

Question 19

Identify this structure and what is it in charge of?

Answer 19

caudal colliculus; auditory (BANG) reflex

Question 20

Identify this structure:

Answer 20

trochlear nerve

Question 21

Identify this structure and what is located within this structure?

Answer 21

crus cerebri; cerebral motor tracts

Question 22

Identify this structure:

Answer 22

oculomotor nerve

Question 23

What is the anatomical basis of clinical signs seen with ptosis?

Answer 23

CN III is damaged therefore the levator palpebrae superioris is not functioning properly; droopy eyelid

Question 24

What is the anatomical basis of clinical signs seen with lateral strabisimus?

Answer 24

CN III is damaged therefore the dorsal and medial rectus are not functioning properly; the eye points ventrally and laterally

Question 25

Identify this structure and what is its function?

Answer 25

cerebral aqueduct; communication between the 3rd and fourth ventricles

Question 26

Identify this structure and what does it consist of (i.e. what makes it up)?

Answer 26

tectum; rostral and caudal colliculi

Question 27

Identify this structure and what is located here?

Answer 27

tegmentum; reticular formation, and motor and sensory nuclei

Question 28

Identify this structure:

Answer 28

cerebral aqueduct

Question 29

Identify this structure:

Answer 29

tectum

Question 30

Identify this structure:

Answer 30

tegmentum

Question 31

Identify this structure:

Answer 31

rostral colliculus

Question 32

Identify this structure:

Answer 32

crus cerebri

Question 33

Identify this structure:

Answer 33

cerebral aqueduct

Question 34

Identify this structure:

Answer 34

tectum

Question 35

Identify this structure:

Answer 35

tegmentum

Question 36

Identify this structure:

Answer 36

medial geniculate nucleus of the thalamus

Question 37

Identify this structure:

Answer 37

rostral colliculus

Question 38

Identify this structure:

Answer 38

cerebral aqueduct

Question 39

Identify this structure:

Answer 39

crus cerebri

Question 40

Identify this structure:

Answer 40

medial geniculate nucleus of the thalamus

Question 41

Identify this structure:

Answer 41

tectum

Question 42

Identify this structure:

Answer 42

tegmentum

Question 43

What major midbrain structures represent the tectum?

Answer 43

rostral colliculus, caudal colliculus

Question 44

What functional deficits woud you expect to see with a lesion of the internal capsule?

Answer 44

information from the cerebrum would not get to the corpus collosum and vice versa

Question 45

Where is the lesion in a dog displaying ventrolateral strabisimus of the right eye?

Answer 45

CN III - right

Question 46

What geniculate nucleus works closely with the occipital lobe?

Answer 46

lateral

Question 47

If the eyes fail to follow your moving hand in front of the animal's face, what nerve(s) could be inured?

Answer 47

CN III and VI

Question 48

What structure of the midbrain gives rise to the trochlear nerve?

Answer 48

crus cerebri

Question 49

What clinical sign would you expect to see when the motor nocleus of the trochlear nerve is involved in the lesion of the right midbrain in a dog or cat?

Answer 49

the dorsal oblique on the left side would not function properly

Question 50

What would you expect to see if the right trochlear nerve is inflamed in a dog or a cat?

Answer 50

periodic symptoms with the left eye

Question 51

What is the functional difference between the lateral geniculate nucleus and the rostral colliculus?

Answer 51

the lateral geniculate nucleus is for vision, the rostral colliculus is for a vision reflex

Question 52

Is the crus cerebri part of the sensory or motor system?

Answer 52

motor system

Question 53

Where do fibers of the crus cerebri originate?

Answer 53

cerebral cortex

Question 54

List three clinical signs induced by a lesion of the right oculomotor nerve.

Answer 54

ptosis, lateral strabisimus, no pupillary response in the right eye