PSYC 333 Study Guide - Final Guide: Postcentral Gyrus, Frontal Lobe, Birth Weight
30 Oct 2014
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Head is the fastest growing portion of the fetus. Newborns head is 70% of its eventual adult size and represents 25% (one fourth) of the body length. Newborn brain is only 25% of its eventual adult weight. As we get older, our head gets smaller in proportion to our body. Double birth weight by 4-6 months of age. Triple birth weight by end of first year. Age 2- toddlers are half their eventual adult height and have quadrupled birth weight to 27 to 30 pounds. Children gain about 2-3 inches in height every year. Children gain about 6-7 pounds in weight every year. Children grow very little; growth becomes obvious again during puberty. Adolescents enter a two to three year growth spurt. Across species: the head of a gorilla is much smaller at birth, and grows enormously during development. Development proceeds in a cephalocadal manner (head down-ward) direction. The trunk grows fastest during the first year.
