Health and Human Development - Summary of development across the lifespan
Summary of development across the lifespan
Over a lifespan, development occurs with a certain predictability.
However, variables such as socioeconomic levels, nutrition and level of
education influence development.
Increase in number and size of nerve cells to attain 25% adult brain
weight and size at birth. Brain is particularly susceptible to teratogens
in weeks 3 to 5 in the embryonic period.
Extensive and rapid growth.
Slows down. 75% of adult sized brain at age 3 and brain reaches maximum
size by age 10.
Nerve connections and associations continue to build up. Myelination
No likely change to capacity.
65-70 year olds in an industrialised country have lost 20% of nerve
cells that were present at birth. This leads to less acuity but not
Development across the lifespan.
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