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構文·語句解説
h
第1段落
IConsiderable attention has been paid to the size or relative size of the human brain.
The first point of interest is that the ratio of brain weight to body is at a maXimum at
birth and decreases with age, reaching a fairly steady level by maturity. 3In other wOras,
newborn babies have very large brains, relatively speaking, weighing some 300 grans.
*This is roughly the size of the brain of an adult male chimpanzee. 5Children and their
brains continue to grow for many years, gradually increasing their ability to learn and
remember. There have been suggestions that the growth of the brains of children is not
steady, but occurs suddenly, each period of rapid growth being associated with
a
particularly important developmental or intellectual stage. 7These stages could be the
ability to reason abstraculy, to taik, or cven to do aritnmetic. SThe idea of sudden brain
growth is still around, but has not attracted much enthusiasm.
1人間の脳の大きさ,あるいは相対的な大きさがかなり注目されてきた。 2興味深い第1の点
は,身体に対する脳の重量の比率が出生時に最も大きく, 年齢とともに減少し, 成熟するまで
にほぼ一定の水準に到達するということである。言い換えれば,新生児は, およそ300グラム
