Purkinje nerve cells Light micrograph of a cross section of cerebellar tissue showing the highly differentiated brain cells known as Purkinje cells They are formed by a flaskshaped body dark at bottom from which dense dark red dendritic ramifications depart The Purkinje cells are found in the cerebellar cortex at the junction between the molecular layer which occupies most of the frame and the granular layer just visible at bottom This contains a huge number of microneurones millions per cubic millimetre known as granule cells round bluegrey Magnification x at xcm size