PSYC 101 1st Edition Lecture 10 Outline of Last Lecture II. Review for Exam One Outline of Current Lecture: DevelopmentII. Prenatal DevelopmentA. Four Stages of Neural Developmenta. Proliferationb. Migrationc. Differentiationd. Continued DifferentiationIII. Inappropriate Behavior During Prenatal Development A.Moderate malnutritionB.Teratogens a.Tobaccob.Alcoholc.Radiation Current LectureDevelopment I. Prenatal Development a. Four Stages of Neural Development i. Proliferation: cells are being born; first trimester; 250,000 neurons per minute – start out as stem cells. ii. Migration: 8-16 weeks; cells born in general area then migrate to appropriate area in the brain. iii. Differentiation: blossoming, dendrites make connections; stem cell becomes a neuroniv. Continued Differentiation: synapse forms; myelination begins (takes about 25 years for brain to be fully myelinated)Post-natal – myelination continues; synaptic pruning: killing off unused neuronsEx: a sculpture starts with a big glob of clay, then scraps off the unneeded edges These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Brain starts as a neural tube – 100 days later, looks like a human brainb. Inappropriate Behavior During Prenatal Developmenti. Moderate malnutrition: can lead to schizophreniaii. Teratogen (Monster Maker): any disease, drug, or other noxious agent that causes abnormal prenatal developmentExamples: 1. Tobacco: SIDS (sudden infant death syndrome), slowing cognitive development, ADHD 2. Alcohol: Fetal Alcohol Syndromea. Critical period is during migration – 8-16 weeks (some women may not even know she is pregnant yet)b. #1 cause for mental retardation in the Western hemispherec. Makes neurons go too far passed connectionsd. In children: perceptual disorder, hyperactivity, small, facial abnormalities, attention span 3. Radiation: interferes with timing of development a. Makes neurons stop short of
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