PSY 202 Chapter Notes - Chapter 10: Thematic Relation, Konrad Lorenz, Gene Expression
25 Feb 2014
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Page(s) 413 -414: most of what develops in the prenatal (prior to birth) period is physical. The greatest changes in prenatal development occur in the earliest stages of pregnancy. The blastocyst keeps growing as cells continue to divide for the firstr week and a half or so. Around the middle of the 2nd week, the cells begin to differentiate, taking a different role as the organs of the body begin to develop: once different cells start to assume different functions, the blastocyst becomes an embryo. For the rest of the pregnancy, the fetus is responsible for physical maturation. Brain development: 18 days and beyond (page 414) The human brain begins to develop only 18 days after fertilization. Our brains continue to develop through asolescence and probably even early adulthood. Between the 18th day of pregnancy, and the end of the 6th month, neurons begin developing at an astronomical rate.
