Home » FFICM Final Overview » FFICM Final Resources » FFICM Final Useful Publications About the Guidewire What is cerebrospinal fluid (CSF)? Specialized transcellular fluid that surrounds the brain and spinal cord Circulates within the cerebral ventricular system and the subarachnoid space Return to Top of the Page Related Pages: FRCA Final Useful Publications FFICM Final Topical Guidelines FFICM Final Examiners Reports FFICM Final Exam Specific Guidance