A<unk>  <unk> um<unk> e) is defined as one of the two regions of the brain that are delineated by the body's median plane. The brain can thus be described as being divided into left and right<unk> s. Each of these<unk> s has an outer layer of grey matter called the<unk>  cortex that is supported by an inner layer of white matter. The<unk> s are linked by the corpus callosum, a very large bundle of nerve fibers, and also by other smaller commissures, including the anterior commissure, posterior commissure, and hippocampal commissure. These commissures transfer information between the two<unk> s to coordinate localized functions. The architecture, types of cells, types of neurotransmitters and receptor subtypes are all distributed among the two<unk> s in a markedly asymmetric fashion. However, it must be noted that, while some of these<unk> c distribution differences are consistent across human beings, or even across some species, many observable distribution differences vary from individual to individual within a given species.
Cerebral hemisphere
Basal ganglia
Cerebellar hemisphere
Temporal lobe
Spinal cord
Cerebellum
Diencephalon
Thalamus