Lab 5 Flashcards
Identify this structure and how many are there?
lateral ventricle; 2
Identify this structure:
third ventricle
Identify this structure and what is its function?
cerebral aqueduct; communication between the third and fourth ventricles
Identify this structure:
fourth ventricle
Identify this structure:
third ventricle
Identify this structure:
cerebral aqueduct
Identify this structure:
fourth ventricle
Identify this structure:
thalamus
Identify this structure:
lateral ventricle
Identify this structure:
hypothalamus
Identify this structure:
caudate nucleus
Identify this structure:
corpus callosum
Identify this structure:
internal capsule
Identify this structure:
lateral ventricle
Identify this structure:
third ventricle
Identify this structure:
cerebral aqueduct
Identify this structure:
fourth ventricle
Identify this structure:
caudate nucleus
Identify this structure:
thalamus
Identify this structure and what is its function?
rostral colliculi of the midbrain; visual reflex
Identify this structure and what is its function?
caudal colliculi of the midbrain; auditory reflex
Identify this structure:
third ventricle
Identify this structure:
choroid plexus
Identify this structure:
fourth ventricle
Identify this structure and what is its function?
choroid plexus; creates CSF
Identify this structure:
medullary velum
Identify this structure:
pyramid
Identify this structure:
cerebellum
Identify this structure:
motor nucleus of the hypoglossal nerve
Identify this structure:
axons of the cranial nerve XII
Identify this structure:
cranial nerve XII
Name the neuroglia that line the inner surface of the ventricles.
ependymal cells
What represents the blood CSF Barrier?
choroid epithelium of the choroid plexus
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?
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
What happens when the cerebral aqueduct is narrowed or closed?
Accumulation of CSF in the lateral and third ventricles, further increasing intracranial pressure
Is there any difference in the outcome of such a narrowed or closed cerebral aqueduct between a pup and adult dog?
Pup still has sutures in the skull so it swells more
In cases of severe cerebral edema, the brain stem is compressed by a herniated caudal cerebrum, but the cerebellum is initially spared. Why?
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
What causes a subdural hematoma?
injury to vasculature in the region, such as a head injury
Why is a subdural hematoma fatal if not treating properly?
a meningioma can occur, the spinal cord and brains stem are likely to be affected
How does the lateral ventricle communicate with the third ventricle?
interventricular foramen
What ventricle is the lateral aperture associated with?
fourth ventricle
What does the lateral aperture open up into?
the subarachnoid space
