The bushy projections that you see from the purkinje cells are actually the base of the dendritic tree, which is quite extensive. These cells have a single axon which projects to deeper relay stations in the brain. Digitally Enhanced photomicrograph of Purkinje cells. Astrocytes have elaborate processes that extend between blood vessels and neurons. They also may play a role in the regulating the permeability of the blood brain barrier.
All black dots are oligodendrocyte nuclei.
As a result, these cells are extremely important for proper neural conduction. The internodal myelin sheath is formed when the oligodendrocyte extends a flap of cell membrane around one or more axons and wraps the membrane many times around the axon. Because of their association with nerve fibers, oligodendroctes are more prevalent in white than gray matter. Color Atlas of the Brain and Spinal Cord. England and Wakely.