Wize University Psychology Textbook > Development
Infant Brain Development
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Infant Brain Development
The brain develops rapidly in newborns
- Weight
- At birth, 25% of adult weight
- By 6 months, 50% of adult weight
- By 5 years, 90% of adult weight
- Brain areas
- "older", deeper areas of the brain develop first
- Prefrontal cortex doesn't finish developing until early- to mid-20s
- Synapses
- New connections develop through learning and maturation
- Unnecessary synapses are pruned
Practice: Infant Brain Development
At 6 months, the infant brain is approximately % of its eventual adult weight