The Common Vein Copyright 2010
The ventricular system is a complex fluid filled structure that enables cerebrospinal fluid to be secreted, stored and circulated in the brain and spinal cord.
Structurally it is diverse consisting of chambers that vary significantly in size, shape and position.
Its function is to store secreted CSF within its chambers and circulate the CSF into the subarachnoid spaces to bathe and protect the brain and spinal cord.
Diseases are most commnly cuased by mechanical obstructions whether by mass effect or by intrinsic stenosis. Normal pressure hydrocephalus is a relatively common condition of the elderly.
Diagnostic procedures are confined to MRI and CTscan which enable visualization of the ventricles and lumbar puncture which allows analysis of the pressures chemnical and cellular content of the CSF.
Treatment is often by shunt decompression o the ventricles
Components of the Ventricular System of the Brain
Courtesy Ashley DAvidoff MD copyright 2010 all rights reserved 94459b06b01.81s
It consists of ;
lateral ventricles (pair)
The lateral ventricles each consist of a frontal horn (anteriorly), body, and temporal horn
Courtesy Ashley Davidoff MD copyright 2010 all rights reserved 94459b10b02.82s
These structures connect via the;
The lateral ventricles connect with the 3rd ventricle via the foramina of Munro
The 3rd ventricle connects with the 4th ventricle via the aqueduct of Sylvius
The 4th ventricle connects with the subarachnoid space via the median aperture of Magendie
The 4th ventricle also connects with the subarachnoid spaces via paired foramina of Luschka
The lateral ventricles are situated in the forebrain within the frontal parietal, occipital and temporal lobes
The 3rd ventricle is situated in the forbrain as well but the aqueduct of Sylvius is positioned in the midbrain.
The 4th ventricle is situated in the hindbrain posterior to the pons and medulla and anterior to the cerebellum.
Courtesy Ashley DAvidoff MD copyright 2010 all rights reserved 94459b14b.82s