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State the pathway for the flow of CSF through the ventricular system starting at the lateral ventricles.
Lateral Ventricles-Interventricular foramen-3rd ventricle-Cerebral aqueduct-4th ventricle-Lateral & median Apertures-Subarachnoid apace-Arachnoid Villi-Subdural sinuses-Venous Blood
The interventricular foramen is also known as _________.
the Foramen of Munro
The Aqueduct of Sylvius (aka, cerebral aqueduct) connects what two ventricles?
The third and fourth ventricles
Whta is the third opening betweel each lateral ventricle and third ventricle?
Foramen of Monroe (aka, Interventricular foramen)
Cerebrospinal fluid (CSF) is mainly produced by what structure?
the choroid plexus in the lateral, third, and fourth ventricles
What 2 openings allow CSF to flow into the subarachnoid space?
The foramina of Luschka and the foramen of Magendie
Where does the absorption of CSF into the bloodstream take place?
in the superior sagittal sinus through structures called arachnoid villi
What is the main function of CSF?
To protect the brain and the spinal cord by acting as a shock absorber, CSF is contained in the four ventricles, the subarachnoid space, and the central canal of the spinal cord.
Define hydrocephalus.
Hydrocephalus literally means "water on the brain" and occurs when there is an increase in the volume of CSF. Due to the closed skull there is no place for the CSF to expand, if pressure becomes too high the brainstem is forced to try to escape (herniate) through the foramen magnum.
Name the 2 types of hydrocephalus.
1)Communicating Hydrecephalus-Nonobstructive: occurs with a defect in excretion through the subarachnoid space: most commonly caused by meningitis.
2)Non-communicating Hydrocephalus- Obstructive; an obstacle prevents the flow of CSF throught he ventricles, i.i., tumor, infection or congenital malformation.
What supporting cells, found on ly in the ventricles, are responsible for creation and circulation of CSF?
ependymal cells