Increase in brain weight during the preschool years is due to the:

Question

Increase in brain weight during the preschool years is due to the:​

Quizplus · Accepted Answer

During the preschool years, there is a continuation of myelination of nerve fibers, which increases brain weight. Myelination is the process of forming a myelin sheath around nerve fibers, which speeds up nerve impulse transmission. This process leads to an increase in brain weight, but not due to an increase in thickness of the skull, size of spinal cord, or growth of the medulla.

Increase in Brain Weight During the Preschool Years Is Due