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Lecture 3

Lecture 3 jan 21

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Department
Psychology
Course
PSY210H5
Professor
Elizabeth Johnson
Semester
Winter

Description
Tuesday, January 21, 2014  Lecture 3 ­ Teratogen: environmental agent, such as drug, medication, dietary imbalance or  polluting substance that may cause developmental deviations in the growing  human organism; most threatening in embryonic stage ­ Teratogen effects are exerted mostly during critical periods. ­ Each different teratogen exerts different effects ­ Maternal or fetal genotypes interact with these effects. Depending on the  genotypes you may have a more or less severe interaction to a teratogen. ­ Exert effects largely during critical periods ­ Each has own effects ­ Maternal/fetal genotypes may counteract ­ One’s effects can intensify effects of others ­ Some may have no effect on mothers ­ The longer the exposure, the worse it is. ­ Most serious damage = first 2­8 weeks in the pregnancy Environmental Dangers­illegal Drugs ­Heroin/cocaine & others: withdrawal symptoms in newborn, birth defects Smoking(nicotine exposure) : leads to low birth weight, increases risk of SIDS (sudden  infant death syndrome), lower IQ, poor school performance, higher risk for dependency  problems later in life. ­ Preterm infant: born  prior to 38 weeks after conception. Weight  is appropriate  for gestational age. ­ Number and severity of problems increase as  ­ Stimulation programmes including massage help offset negative outcomes ­ Parental contact important for both infants and parents ­ Long­term effects are dependent on SES and other environmental factors. (Child’s  responsiveness, mother’s competence, family stresses, family and community  support) Fetal alcohol syndrome:  ­ Resul
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