6 Brain development

6 Brain development - How Does the Brain Develop How Does...

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Unformatted text preview: How Does the Brain Develop How Does the Brain Develop and Adapt? and Adapt? Lecture Overview Neurobiology of Development Neurobiology of Development Correlating Behavior with Brain Correlating Behavior with Brain Development Development Brain Development and the Environment Brain Development and the Environment Conception Stages of Prenatal Development 1. Germinal Period 2. Embryonic period 3. Fetal Period The Germinal Period Fertilization/Implantation Zygote (2 weeks after conception) Differentiation Ectoderm -> skin, N.S. Mesoderm ->muscle, tissue Endoderm -> gut, lungs 2nd week zygote becomes embryo. The Embryonic Period Week 3-8 Embryo grows/Placenta develops Main organs appear Sexual Differentiation One month Two months The Fetal Period From week 9 birth Resembles human form Major systems/specialized functions Viable at 6 months. Three months Four months 7 Months 9 months Neurobiology of Development Basic Vertebrate Nervous System Gross Development Starts with conception-fertilization of egg Zygote: Fertilization to 2 weeks Embryo: 2-8 wks Fetus: 9 wks-birth Embryonic Disk- 3 layers Endoderm Mesoderm Ectoderm: Ectoderm: becomes NS Ectoderm- main portions Neural Plate Primitive neural tissue- thickened region that gives rise to neural tube outermost layer of cells Folds to form neural groove Neural Tube Tube which the brain and sp. cord develop Major Events Day 49: Embryo begins to resemble a miniature person Day 60: Sexual differentiation Genitals and brain regions Day 100: Brain looks human 7 Months: Gyri and sulci begin to form 9 Months: Brain looks like an adult brain Neuron/Glia Development...
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This note was uploaded on 11/19/2010 for the course PSYCH 2275 taught by Professor Weiner,j. during the Spring '10 term at CUNY Hunter.

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6 Brain development - How Does the Brain Develop How Does...

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