Lecture 1 Development Part 1

Lecture 1 Development Part 1 - Developmental Psychology...

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Developmental Psychology: Universal aspects of lifespan development from conception through death; Identifies cultural variations Explores physical, cognitive, social and emotional development
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Physical Development Cephalocaudal: head to feet Proximodistal: center moving outward Prenatal Development Germinal Phase (conception 2 weeks) Zygote: fertilized egg Placenta: structure that allows oxygen and nutrients to pass into fetus from mother’s bloodstream; allows waste to pass out
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Embryonic Stage: 2-8 weeks Head, face and neck develop Buds for limbs form and grow Major organs/digestive system differentiating Heartbeat begins
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Fetal Stage: 3 rd month: digestive organs begin to function Buds for teeth form Sex organs develop rapidly Arms/fingers move 4 th month: face looks human Lower body outgrows head Bones are defined
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5 th month: fingernails and toenails appear Lanugo: fine, wooly hair over body Vernix: waxy coating collects 6 th month: eyebrows/lashes well defined Eyes completely formed 7 th month: fetus capable of life outside uterus
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8 th /9 th month: fat is deposited for later use Fingernails beyond fingertips Lanugo is shed Myelination of brain takes place Chief organs increase functioning Vernix covers body
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Teratogens: harmful toxin that affects development resulting in defect, damage, or anomoly Important concepts with teratogens Dose: how much? Basic Heredity: vulnerable vs. sturdy Age of organism at exposure Multiply determined: stress, nutrition, lack of medical care
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Teratogenic Agents Drugs or Chemicals Increased understanding of the role of prenatal exposure to drugs on the developing child: thalidomide Stress: prolonged stress linked with prematurity and low birth weight
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Smoking: mild stimulant; increases fetal activity; low birth weight, increased SIDS Marijuana: low birth weight, disturbed sleep in newborns, reduced attention to environment
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