Chapter 4 Psych Notes - Chapter 4 Human Development Hind...

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Chapter 4 Human Development Hind Brain Modula- vital functions, respiration, heart rates. Cerebellum- controls your finely coordinated movements. Picture of Baby with Three arms Human Development Developmental Psychology – studies the course and causes of developmental changes over a person’s lifetime . Social, moral, intellectional, and emotional development as well Nature (genetics that you are born with) vs. Nurture (environment in which you are and how educated people are around you; your first environment is in the womb) Prenatal Development (upwards of 300 million sperm released and allows six hours for one of the sperm to get to the fallopian tube) Zygote – fertilized egg that can go down the fallopian tube Blastula - hollow ball of 150 cells, 50 percent of all blastulas are naturally aborted Two weeks from fallopian tubes to implantation into the womb Stages of Prenatal Development Germinal stage - zygote fertilization to uterine implantation (first 2wks). Embryonic stage (critical period) - basic body plan and organs are formed, also a lot of morning sickness(ridding body of toxins) . Teratogens can cause the most harm during this period because of vital organs being formed.. More morning sickness means less miscarriages (2wks to 2mths)
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Fetal stage bones , muscles, and movement. Eye lids open at around the sixth month. Around the seventh month organ systems start to function. 250,000 neurons per minute. Baby can live outside the womb for 24 to 26 weeks. Start to have memories at this time. Sleep and wake cycles develop at around the 8 th or 9 th month. (2mths to birth). Principles of Growth Cephalocaudal Principle - head to tail development Proximodistal Principle - center outward to extremities Prenatal Risks Placenta - intakes nutrients expels wastes Teratogens– harmful environmental agents or toxins. Morning sickness rids the body of these Teratogens Thalidomide ( morning sickness medicine) - flipper limbs; used in the 60’s.
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