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Myelinogenesis
Myelinogenesis is generally the proliferation of myelin sheaths throughout the nervous system, and specifically the progressive myelination of nerve axon fibers in the central nervous system. This is a non-simultaneous process that occurs primarily postnatally in mammalian species, beginning in the embryo during the midst of early development and finishing after birth.
==Function==
The myelination process allows neuronal signals to propagate down an axon more swiftly without the loss of signal. This enables better connectivity within specific brain regions and also improves broader neuronal pathways connecting spatially separate regions required for many sensory, cognitive, and motor functions.
Some scientists consider myelination to be a key human evolutionary advantage, enabling greater processing speeds that lead to further brain specialization. Myelination continues for at least another 10 to 12 years after birth before an individual is fully developed.〔Paus, T., Zijdenbos, A., Worsley, K., Collins, D. L., Blumenthal, J., Giedd, J. N., ... & Evans, A. C. (1999). Structural maturation of neural pathways in children and adolescents: in vivo study. Science, 283(5409), 1908-1911.〕 While the rate at which individual children develop varies, the sequence of development is the same for all children (with a range of ages for specific developmental tasks to take place).
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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