Part of the axons of the central nervous system is covered by a special electrically substance - myelin. Myelination of axons carry cell Sinemet. In the central nervous system, this is the role of oligodendrocytes in the peripheral - Schwann cells, which are a kind of oligodendrocytes. Oligodendrotsit wrapped around the axon, forming a multi-layered shell. Myelination is not exposed area of ​​axonal hillock and axon terminals. Carbidopa-Levodopa cytoplasm extruded from the intermembrane space in the process of "wrapping". Thus, the axon myelin sheath is composed of densely packed, alternating lipid and protein membrane layers. The axon is not entirely covered with myelin. In the myelin sheath, there are regular breaks, nodes of Ranvier. The width of the intercept from 0.5 to 2 and 5 microns.

Generic Sinemet - a rapid jump spread of action potentials is carried out without damping. In the central nervous system of axons of different neurons, bound to a single structure, form ordered bundles - pathways. In such a vascular bundle axons sent "a parallel course," and often one glial cells form a shell of a few axons. Because myelin is a white substance, the pathways of the nervous system, consisting of densely lying myelinated axons form the white matter of the brain. In Sinemet generic name localized cell bodies, dendrites and axons of the unmyelinated.Within the central nervous system, each terminal axon ends in a dendrite, or axon, the body of other neurons. Contacts between cells are classified according to what they are formed. Contact formed by the axon to dendrite is called Sinemet side effect. If it is formed by two axons, it is called axo-axonal, and two dendrites - dendro-dendritic.