11. The subarachnoid space covers the brain and spinal cord. 12. The subarachnoid space contains cerebrospinal fluid ( CSF ). 13. Cerebrospinal fluid, which fills the subarachnoid space between the brain, is normally clear and colorless. 14. This arises due to rupture of the artery and accumulation of blood in the subarachnoid space . 15. With mild infiltration, tumor cells are found diffusely in the subarachnoid space from the sacral levels. 16. Instead, the entire subarachnoid space is sealed towards the nervous tissue by the glia limitans superficialis. 17. The subarachnoid space abhors all foreign body substances. 18. It circles anteriorly around the brainstem and runs forward toward the eye in the subarachnoid space . 19. If the pressure is reversed for some reason, fluid will not pass back into the subarachnoid space . 20. Rather, these subarachnoid spaces are separated from each other by a trabeculated porous wall with various-sized openings.
