The cerebellum is a region of the brain that is needed for motor coordination and balance. It has the cerebellar cortex which has 3 layers: molecular layer is the outermost, Purkinje cell layer is in the middle with Purkinje cells that are the primary output neurons in the cerebellar cortex, and the granular layer which is the innermost layer consisting of granule and Golgi cells. It also has white matter which is at the core consisting of myelinated axons connecting the cerebellar cortex to the cerebellar nuclei and other regions of the brain.

The cerebrum composes most of the brain and is made of gray and white matter. Its gray mater functions in memory, thinking, sensory processing. Meanwhile, the white matter connects the different regions of the brain. The molecular layer is the outermost layer composing of horizontal axons, dendrites, and glial cells. The granular layer has stellate and pyramidal cells and is needed for receiving thalamic and other cortical inputs. Lastly, the pia mater is in the innermost part of the cerebrum and it’s a thin membrane that adheres to the surface of the cerebrum.