CSF

Definition

Cerebrospinal fluid (CSF) is a clear, colorless body fluid found within the brain and spinal cord. It cushions the central nervous system and provides vital nutrients while removing waste products.

5 Must Know Facts For Your Next Test

1. CSF is produced by the choroid plexus in the ventricles of the brain.
2. It circulates through the ventricles, central canal of the spinal cord, and subarachnoid space before being absorbed into the bloodstream.
3. Infections such as bacterial meningitis can alter CSF composition, leading to changes in its appearance, pressure, and cell count.
4. A lumbar puncture (spinal tap) is a diagnostic procedure used to collect CSF for analysis.
5. Normal CSF is sterile; presence of bacteria, fungi, or parasites indicates an infection of the nervous system.

Review Questions

• What are two primary functions of cerebrospinal fluid?
• How does bacterial meningitis affect cerebrospinal fluid?
• What diagnostic procedure is commonly used to analyze cerebrospinal fluid?

Related terms

Meningitis: Inflammation of the protective membranes covering the brain and spinal cord.

Lumbar Puncture: A medical procedure used to collect cerebrospinal fluid from the lower spine.

Choroid Plexus: A network of cells that produce cerebrospinal fluid in the ventricles of the brain.