PSYCH Lecture 15 - Development

PSYCH Lecture 15 - Development - Development Part One...

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Development Part One March 17, 2011
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Definition 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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Development Physical Development Cephalocaudal: head to feet Proximodistal: center moving outward Prenatal Development (Consists of Germinal, Embryonic, Fetal) Germinal Phase (conception => 2 weeks) Zygote: fertilized egg Placenta: Structure that allows oxygen & nutrients to pass into fetus from mother’s bloodstream Allows waste to pass out
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Embryonic Stage Embryonic Stage : 2-8 weeks Major organs/digestive system differentiating Heartbeat begins Germinal, embryonic, fetal
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Fetal Stage 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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Fetal – 5 th , 6 th , 7 th 5 th month: Lanugo : fine, wooly hair over body Vernix : waxy coating collects (vernix: “x” for wa”x”y coating) 6 th month: Eyebrows/lashes well-defined Eyes completely formed 7 th month: Fetus capable of life outside uterus (Age of Viability)
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Fetal – 8 th , 9 th 8 th /9 th month: Fat is deposited for later use Fingernails beyond fingertips Lanugo is shed Myelination (axons form) of brain takes place Chief organs increase functioning Vernix covers whole body
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Teratogens Teratogens: Harmful toxins that affect development resulting in defect, damage, or anomaly Important concepts with Teratogens Dose: how much? With alcohol consumption Basic Heredity: vulnerable vs. sturdy Multiple Determination: stress, nutrition, lack of medical care Age of organism at exposure
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Teratogenic Agents Drugs or Chemicals Increased understanding of the role of prenatal exposure to drugs on the developing child: Thalidomide Used to give pregnant women in 50s (to stop morning sickness), caused arms to not develop fully Stress: Prolonged stress linked with prematurity and low birth weight
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Teratogenic Agents, cont. Smoking: Mild stimulant Increases fetal activity Low birth weight Increased risk for SIDS (sudden infant death syndrome) Marijuana: Low birth weight Disturbed sleep in newborns Reduced attention to environment
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Teratogenic Agents, cont. Heroin Premature birth weight Tremulous behavior Poor sleep Risk of SIDS Cocaine: “crack babies” Premature size/weight Tremulous behavior High pitched crying Rigidity Withdrawal symptoms Deformities Comorbidity Abuse of multiple substances daily
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PSYCH Lecture 15 - Development - Development Part One...

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