Human Growth and Development / Unit 7 HGD 0903 short lesson, about 20 seconds
The Brain at Seven
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The idea
By seven or eight the brain reaches about ninety-five percent of adult size; myelination and synaptic pruning continue, speeding processing.
In practice
The prefrontal cortex, which serves logic, planning, memory and attention, changing most across these years.
Where people slip
Neuron numbers change little; gains come from stronger connections, as used synapses strengthen and unused ones are eliminated.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
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