Cerebro-spinal fluid, known to doctors as CSF, as clear as liquid crystal, circulating through the strands of the arachnoid, flashes and glistens like silver in the microscope’s light. Through this I can see the smooth yellow surface of the brain itself, etched with minute red blood vessels – arterioles – which form beautiful branches like a river’s tributaries seen from space. Glistening, dark purple veins run between the two lobes leading down towards the middle cerebral artery and, ultimately, to where I will find the aneurysm.
