Purkinje neuron from a canine cerebellar cortex (Golgi stain). Three Purkinje (piriform) cells are more or less stained. The cell body of the Purkinje neuron is pear-shaped (P). From one of the cell bodies, a rich dendritic tree can be seen entering the molecular layer of the cerebellar cortex. A single axon (arrow) leave the deep surface of the cell body. (The axons passes through a granule cell layer and enters white matter.)