Plexus choroideus

Plexus Choroideus

The plexus choroideus (or choroid plexus) is a structure in the ventricles of the brain where cerebrospinal fluid (CSF) is produced. The choroid plexus consists of modified ependymal cells and vascular plexus of fenestrated capillaries.

Structure

The plexus choroideus is located in the ventricles of the brain, specifically within the lateral ventricles, third ventricle, and fourth ventricle. It is a network of cells that produce the cerebrospinal fluid (CSF) that bathes and cushions the brain and spinal cord within their bony confines.

Function

The primary function of the plexus choroideus is the production of cerebrospinal fluid (CSF). The cells of the choroid plexus filter blood plasma and allow for the selective transfer of ions and molecules to produce CSF. This fluid serves several purposes, including providing buoyancy and protection to the brain, removal of waste products, and carrying nutrients to the brain tissue.

Clinical significance

Abnormalities of the plexus choroideus can lead to conditions such as hydrocephalus, where there is an overproduction of CSF, or choroid plexus carcinoma, a rare type of brain tumor. In addition, the choroid plexus can be a site of metastasis for certain types of cancer.

See also

• Cerebrospinal fluid
• Ventricles of the brain
• Hydrocephalus
• Choroid plexus carcinoma