CNS regions that are dominated by myelinated axons are called <u>white matter</u> and CNS regions that are dominated by neuron cell bodies, neuroglia, and unmyelinated axons are called <u>grey matter</u>.
White matter are the areas of the central nervous system that are dominated by myelinated axons and its function is to regulate the electrical signals in axions while the grey matter are areas in the central nervous system that are dominated by neuron cell bodies, neuroglia, and unmyelinated axons