Internal carotid aa. Middle cerebral aa. Anterior cerebral aa. There are human brains in a plastic bucket for each table or group of four students. The brains must be kept wet at all times.
Students are responsible for keeping the water level high in the buckets.
Any browning of the tissue is a sign of drying. During the examination of the specimens, keep them wet by squeezing water over them from the cheese cloth. Do not remove anything from the brain today except according to the instructions. They are illustrated on a schematic drawing of a brainstem which has been sectioned in the mid-sagittal plane. The vascular territories these vessels supply to the cerebral cortex can be seen using Haines Figs.