Lab 5

Question 1

Identify this structure and how many are there?

Answer 1

lateral ventricle; 2

Question 2

Identify this structure:

Answer 2

third ventricle

Question 3

Identify this structure and what is its function?

Answer 3

cerebral aqueduct; communication between the third and fourth ventricles

Question 4

Identify this structure:

Answer 4

fourth ventricle

Question 5

Identify this structure:

Answer 5

third ventricle

Question 6

Identify this structure:

Answer 6

cerebral aqueduct

Question 7

Identify this structure:

Answer 7

fourth ventricle

Question 8

Identify this structure:

Answer 8

thalamus

Question 9

Identify this structure:

Answer 9

lateral ventricle

Question 10

Identify this structure:

Answer 10

hypothalamus

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

lateral ventricle

Question 15

Identify this structure:

Answer 15

third ventricle

Question 16

Identify this structure:

Answer 16

cerebral aqueduct

Question 17

Identify this structure:

Answer 17

fourth ventricle

Question 18

Identify this structure:

Answer 18

caudate nucleus

Question 19

Identify this structure:

Answer 19

thalamus

Question 20

Identify this structure and what is its function?

Answer 20

rostral colliculi of the midbrain; visual reflex

Question 21

Identify this structure and what is its function?

Answer 21

caudal colliculi of the midbrain; auditory reflex

Question 22

Identify this structure:

Answer 22

third ventricle

Question 23

Identify this structure:

Answer 23

choroid plexus

Question 24

Identify this structure:

Answer 24

fourth ventricle

Question 25

Identify this structure and what is its function?

Answer 25

choroid plexus; creates CSF

Question 26

Identify this structure:

Answer 26

medullary velum

Question 27

Identify this structure:

Answer 27

pyramid

Question 28

Identify this structure:

Answer 28

cerebellum

Question 29

Identify this structure:

Answer 29

motor nucleus of the hypoglossal nerve

Question 30

Identify this structure:

Answer 30

axons of the cranial nerve XII

Question 31

Identify this structure:

Answer 31

cranial nerve XII

Question 32

Name the neuroglia that line the inner surface of the ventricles.

Answer 32

ependymal cells

Question 33

What represents the blood CSF Barrier?

Answer 33

choroid epithelium of the choroid plexus

Question 34

Severe cerebral edema significantly increases intracranial pressure and such condition, if not treated, may contribute to a further increase in intracranial pressure with serious consequences. Why is that?

Answer 34

Increase in pressure causes herniation of the cerebrum and compression of the midbrain, narrowing/blocking of the cerebral aqueduct, accumulation of the CSF in lateral and third ventricles, further increases the intracranial pressure

Question 35

What happens when the cerebral aqueduct is narrowed or closed?

Answer 35

Accumulation of CSF in the lateral and third ventricles, further increasing intracranial pressure

Question 36

Is there any difference in the outcome of such a narrowed or closed cerebral aqueduct between a pup and adult dog?

Answer 36

Pup still has sutures in the skull so it swells more

Question 37

In cases of severe cerebral edema, the brain stem is compressed by a herniated caudal cerebrum, but the cerebellum is initially spared. Why?

Answer 37

compression of the midbrain is likely to block the cerebral aqueduct, only then will pressure build up and begin to affect the cerebellum. It will not happen immediately

Question 38

What causes a subdural hematoma?

Answer 38

injury to vasculature in the region, such as a head injury

Question 39

Why is a subdural hematoma fatal if not treating properly?

Answer 39

a meningioma can occur, the spinal cord and brains stem are likely to be affected

Question 40

How does the lateral ventricle communicate with the third ventricle?

Answer 40

interventricular foramen

Question 41

What ventricle is the lateral aperture associated with?

Answer 41

fourth ventricle

Question 42

What does the lateral aperture open up into?

Answer 42

the subarachnoid space