Myelination is the process through which axons become coated with a fatty substance that speeds up the transition of nerve impulses.
What is myelination?
The process of myelination involves the production of layers of myelin by brain oligodendrocytes, which wrap around neuronal axons and serve as an insulating layer for the transmission of electric action potentials. Saltatory conduction, which occurs at the intersections of these nodes of Ranvier or myelin sheaths, promotes axonal transmission. Magnetic resonance imaging (MRI) can measure the degree of myelination in the baby's brain in accordance with particular developmental milestones that are comparable to the typical developmental milestones in the clinical setting. None of the brain is myelinated during the first stages of brain development.
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