Considerable attention has been( 1
) to the size or relative size of the human bram. Te
。 fst 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, In other words. newbon babies,
、 have a very large brain, relatively speaking, weighing some 300 grams.This is roughly the size
of the brain of an adult male chimpanzee. Children and their brains continue to grow for many
| years,gradually( 2 )their ability to learm and remember, There have been suggestions that
、the gyowth of the brains of childyen is not steady, but occurs uddenly each period of rapid
growth( 3 )associated with a particularly importantdevelopment or intellectualstage.
