Ventricles of the brain

 Ventricles of the brain

Ventricles

Spaces inside the brain that produce CSF.

With in the brain, there are four irregular shaped cavities containing cerebrospinal fluid which are called ventricles.

These are-

1. Right and left lateral ventricle

2. Third ventricles

3. Fourth ventricles

In walls of ventricles , a network of capillaries called choroid plexus. These plexus form the CSF.

1. Lateral ventricles

The lateral ventricles are located with in cerebrum one in each hemisphere (one on each side of median plane).

The lateral ventricles are separated from each other by a thin membrane called septum pellucidum, which lies in midline just inferior to corpus callosum. ( C- shaped thick bundle of nerve fibers).

They communicated with third ventricle by interventricular foramina.

2. Third ventricles

Third ventricles is the cavity below the lateral ventricles. It is located in center of diencephalon between two parts of thalamus.

It communicates with 4th ventricle by canal called cerebral aqueduct.

3. Fourth ventricle

Fourth ventricle is diamond shaped cavity situated below and behind third ventricle, between pins; brain stem and cerebellum.

It is continuous below with central canal of spinal cord.

Fourth ventricle communicated with subarachnoid space by foramina in the roof.

CSF enters subarachnoid space through these openings.