Ventricles (Quiz 4) Flashcards
What are the glia of the CNS?
-astrocytes
-oligodendrocytes
-microglia
-ependymal cells
Which glial cells line the ventricular system?
ependymal cells
T/F: each region of the CNS contains a portion of the ventricular system
true
There are ____ ventricles from rostral to caudal
4
Each lateral (L/R) ventricle communicates with the 3rd ventricle by an _________________ on either side of the median plane
interventricular foramen (also called Monro)
The 3rd ventricle communicates with the 4th ventricle by way of the….
cerebral aqueduct (also called aqueduct of sylvius)
The 4th ventricle becomes continuous with the central canal of the medulla and spinal cord and opens by means of apertures into the….
subarachnoid space
Where are the lateral ventricles located?
L/R cerebral hemispheres
What are the 5 parts of the lateral ventricle?
1) anterior/frontal horn (located in frontal lobe, anterior to the interventricular foramen)
2) body (in frontal and parietal lobe, extending posteriorly to the region of the splenium of the corpus callosum)
3) inferior/temporal horn (located in temporal lobe)
4) posterior/occipital horn (located in parietal and occipital lobes)
5) atrium/trigone (junction of splenium of where the body and the posterior+ inferior horns meet)
Where is the 3rd ventricle found?
between the thalami
Where is the 4th ventricle found?
between cerebellum and brainstem
What shape is the lateral ventricle?
C shape
The caudate nucleus is a part of what ventricle?
lateral ventricle (caudate nucleus is related to basal nuclei/striatum)
The head of the caudate nucleus forms the ________ wall of the anterior horn of lateral ventricle. The caudate’s smaller body forms most of the lateral wall of the body of the ventricle. The tail of the caudate lies in the roof of the ________ horn
lateral, inferior
As the caudate nucleus becomes smaller, the __________ becomes larger and forms the floor of the body of the lateral ventricle
thalamus
The body of the corpus callosum forms the _____ of the anterior horn and the body of the lateral ventricle
roof
The _______________ is a membrane that forms the medial wall of the body and anterior horn of the lateral ventricle.
septum pellucidum
The _____________ forms most of the floor and medial wall of the inferior horn of the lateral ventricle
hippocampus
The 3rd ventricle occupies most of the midline region of the….
diencephalon
The hole in the 3rd ventricle correspond to the ________________, which joins the thalami and crosses the ventricle in most human brains
interthalamic adhesion
Which ventricle is between the lateral ventricles and the 4th ventricle, and functions to move CSF between them?
3rd ventricle
What are the parts of the 3rd ventricle?
-cavity
-anterior wall
-posterior wall
-floor
-roof
-2 lateral walls
Anteriorly, the 3rd ventricle ends at the _______________, the remnant of the rostral neuropore
lamina terminalis
The medial surface of the thalamus and hypothalamus forms the wall of the _______ ventricle. The optic chiasm, infundibulum, and the mammillary bodies of the hypothalamus forms its floor
3rd
At the posterior end of the mammillary bodies, the 3rd ventricle narrows fairly abruptly to become the….
cerebral aqueduct of sylvius
An outline of the 3rd ventricle reveals 4 protrusions called….
recesses
Recesses are areas which have evaginated from the diencephalon. What are the 4 recesses of the 3rd ventricle?
1) optic recess (anterior to optic chiasm)
2) infundibulum recess (posterior to optic chiasm)
3) pineal recess (lies between the pineal stalk)
4) suprapineal recess (above the body of the pineal gland)
The _____________ foramen, in the anterior part of each wall of the 3rd ventricle, is an important radiological landmark. Blockage of one of the foramens is a common cause of obstructive or noncommunicating hydrocephalus
interventricular
The 4th ventricle is sandwiched between the cerebellum posteriorly and the ______ and rostral medulla anteriorly. The floor is relatively flat, as it narrows in both directions it takes on a rhomboid shape. The 4th ventricle narrows rostrally into the cerebral aqueduct and caudally into the central canal of the spinal cord. The lateral side of the rhomboid forms tubular projections called the ____________ of the 4th ventricle
pons, lateral recess
The rostral portion of the roof of the 4th ventricle is the _____________________, and the caudal portion is the _______________________
superior medullary velum, inferior medullary velum
(the superior medullary velum is a thin layer of white matter related to the cerebellum)
The inferior medullary velum is a membrane containing the….
choroid plexus
What does fastigium mean?
tip of tent
There are 3 apertures in the 4th ventricle through which the ventricular system communicates freely with subarachnoid space. What are the 3 apertures?
a single median aperture also known as foramen of megendie (in the inferior medullary velum)
2 lateral apertures also known as foramina of Luschka (inferior medullary velum covers the lateral recess, and at the end of each recess is the lateral aperture)
***note: the CSF flows down the posterior side of central canal and then back up the anterior side
What is 1?
central part of the lateral ventricle
What is 2?
anterior horn of the lateral ventricle
What is 3?
interthalamic adhesion
What is 4?
interventricular foramen
What is 5?
3rd ventricle
What is 6?
optic recess
What is 7?
infundibular recess
What is 8?
inferior horn of the lateral ventricle
What is 9?
suprapineal recess
What is 10?
pineal recess
What is 11?
posterior horn of the lateral ventricle
What is 12?
cerebral aqueduct
What is 13?
fastigium
What is 14?
4th ventricle
What is 15?
lateral recess of the 4th ventricle
What is 16?
central canal
