Is Myelination Complete at Birth?

Myelination (the coating or covering of axons with myelin) begins around birth and is most rapid in the first 2 years but continues perhaps as late as 30 years of age.

At what age is myelination complete?

Neurodevelopmental Physiology

Peripheral myelination is complete by 5 years of age, and this correlates with NCS reaching adult values by 4 to 5 years of age. However, as compared with the peripheral nervous system, there is a delay in the post-myelination growth rate of the central nervous system pathways.

Is myelination completed during neonatal development?

In neonate brains, only 0.5–1 degrees of myelin were observed in the sampled sites and only a few sites achieved the degree of 4, and most of the WM myelination is still incomplete by the second postnatal year.