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The Developing Brain

The Developing Brain. Significant changes occur all through development but especially during the first 2 years Development tends to be from back to from and from lower to upper. Brain Development: The Brainstem. The Limbic System. The Cerebral Cortex.

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The Developing Brain

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  1. The Developing Brain • Significant changes occur all through development but especially during the first 2 years • Development tends to be from back to from and from lower to upper

  2. Brain Development: The Brainstem

  3. The Limbic System

  4. The Cerebral Cortex

  5. What Develops: Major areas of the brain • Neuronal Growth and Myelinization

  6. Brain Maturation • Beginning around 2 months there is a significant increase in dendritic branching • This increase continues all through development in different parts of the brain

  7. CNS Development • There is an overproduction of dendrites and axons which results in in subsequent elimination or “pruning”

  8. Human Brain at Birth 14 Years Old 6 Years Old 9

  9. CNS Development • There is an overproduction of dendrites and axons which results in in subsequent elimination or “pruning” • Why is there an excess? • What connections get pruned or eliminated?

  10. CNS Development • In order for pruning to occur, child only has to be in a relatively normal environment • Small differences among normal environments will not affect pruning • For example, parents reading books • These more subtle environmental differences affect the chemistry of the brain not its basic structure

  11. Brain Maturation

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