I separate the two lobes of the brain by gently stretching them apart, cutting the minute strands of arachnoid that bind them together with a pair of microscope scissors in one hand while I keep the view clear of spinal fluid and blood with a small sucker. The brain is a mass of blood vessels and I must try to avoid tearing the many veins and minute arteries both to prevent bleeding from obscuring the view and also for fear of damaging the blood supply to the brain.
