Cerebrospinal Fluid MCQ - Practice Questions with Answers

Cerebrospinal Fluid

Cerebrospinal Fluid:

• The cerebrospinal fluid (CSF) is a clear watery nutritional fluid containing sodium chloride, potassium, glucose, and various proteins.
• It fills the space between the arachnoid and pia mater of the central nervous system (CNS), the ventricles of the brain and the central canal of the spinal cord. 
• It is secreted by the choroid plexuses.
• In addition to providing nutritional supply to the brain, the CSF also removes by-products of metabolism, and also serves to provide a fluid cushion to protect the brain from injury.

Flow of CSF:

• CSF flows from the lateral ventricles via the foramina of Monro into the third ventricle, and then into the fourth ventricle via the cerebral aqueduct in the brainstem. 
• From there, it passes into the central canal of the spinal cord and into the subarachnoid space via three small foramina: the central foramen of Magendie and the two lateral foramina of Luschka.
• The fluid then is reabsorbed via the arachnoid villi into the venous system. 
• CSF within the spinal cord can flow all the way down to the lumbar cistern at the end of the cord around the cauda equina.