PS102 Lecture Notes - Synaptic Pruning, Cardiovascular Disease, Breastfeeding
Document Summary
Germinal first two weeks: rapid cell division, zygote implantation of the uterine wall, the uterine wall can reject the zygote, which terminates pregnancy, at this stage the outer portion of the zygote becomes the placenta. Embryonic two weeks to two months: the vital organs begin to develop, shell of a human. Fetal two months to birth: muscles and bones begin to develop. Illness: fifth"s disease, rubella, measles, the flu, herpes (herpes could lead to deafness and blindness, brain damage, a smaller head size), aids. Norms: median ages at which kids show certain abilities, milestones example rolling over at 3 months, walking at a year, sitting up at 5 months. Cultural variation: in agrarian cultures, children learn to walk faster, because we are told to lay our babies on their backs, crawling becomes less of a milestone, cultures and even within cultures can change the milestones. Slow to warm to strangers = anxious adolescent: uninhibited.
