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    Age the prefrontal cortex shows the greatest decline

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    In the prefrontal cortex, what ages show the greatest rate of decline in synapses (can you give approx. number of synapses per age)?

    Same question for the visual cortex?

    What accounts for this synaptic rearrangement and why does it occur when it does?

    © BrainMass Inc. brainmass.com October 10, 2019, 2:21 am ad1c9bdddf
    https://brainmass.com/biology/human-biology/decline-synapses-prefrontal-visual-cortex-373390

    Solution Preview

    The human brain at birth contains close to 100 billion neurons. Huttenlocher reported that infants, at birth, have almost the same synaptic densities as adults.

    The frontal cortex peak of synaptic density, around 1 to 2 years of age, is 50 percent higher than for an
    average adult. At two to 16 years ...

    Solution Summary

    Various phases of the human brain development are discussed.

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