what is nih csf test
What Is a CSF Analysis? Cerebrospinal fluid (CSF) analysis is a way of looking for conditions that affect your brain and spine. Itâs a series of laboratory tests performed on a sample of CSF. CSF is the clear fluid that cushions and delivers nutrients to your central nervous system (CNS). The CNS consists of the brain and spinal cord. CSF is produced by the choroid plexus in the brain and then reabsorbed into your bloodstream.