CSF Flow Diagram (IMAGE) University of North Carolina Health Care Caption CSF normally flows continuously throughout the extra-axial and perivascular spaces, where it filters out inflammatory proteins, before draining efficiently from the extra-axial space Credit Dea Garic & Mark Shen Usage Restrictions Credit must be given to the creator. License CC BY Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.