Those who think the brain myelination process is finished by the time a child reaches the early age of three years, will be sorely mistaken. Neuronal insulation of electrical connections is propagated as a myelin sheath and it is in the teens years, where we see this process in full swing.
We might think teens have switched off or have even lost the ability of language because they answer via grunts or through few words. Well in fact they have. Teens experience a period where the old, unused electrical connections are being shed for newer, appropriate synaptic connections as they gather and process knowledge. The myelin sheath insulates those needed electrical connections.
If children do not make sufficient, essential synaptic connections at an early enough age, they will run risk of losing connections that are imperative for the establishment of language, reading etc. due to the heavy demyelination process incurred throughout the teens years.
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