Ventricles Flashcards
What forms the ventricular system?
The lumen (central cavity) of the neural tube expanding with the developing vesicles
What ventricles are formed from the telencephalon?
The two lateral ventricles are formed from the telencephalon (cerebral hemispheres)
What ventricle is formed from the Diencephalon?
The third ventricle
—a third midline unpaired ventricle
What ventricle is formed from in the pons and medulla, just below the cerebellum?
The forth ventricle
—a fourth midline unpaired ventricle
Ventricles are defined as?
Cavities within the Central Nervous System, derived developmentally from the neurotube
Lateral ventricles occur where?
In each of the two cerebral hemispheres
The lateral ventricles are continuous with what?
A single midline Third Ventricle through interventricular foramen of Monro
What is the inter ventricular foramen of Monro?
It connects the Right and left sides of the lateral Ventricles
—it is responsible for allowing Cerebrospinal fluid (CSF) to get into the third ventricle
Where does the the third ventricle occur?
On the midline in the sagittal plane & is continuous caudally with the Cerebral aqueduct of Sylvius in the midbrain
What is the Cerebral Aqueduct of Sylvius?
A canal that connects the 3rd ventricle to the 4th ventricle
What does the Cerebral Aqueduct of Sylvius do?
The cerebral aqueduct empties into the fourth ventricle of the pons and medulla
The fourth ventricle is continuous with what?
Remnants of the central canal of the spinal cord
The fourth ventricle communicates with what space?
The subarachnoid space
Through what/ How does the 4th ventricle communicate with subarachnoid space?
Two lateral apertures
—Foramina of Luschka
One midline aperture
—Foramen of Magendie
What is the purpose of the Foramina of Luschka and the Foramen of Magendie?
They are the last 3 foramina that allow for CSF to leave the ventricular system
