06 - Brain development

06 - Brain development - StagesofPrenatalDevelopment...

Info iconThis preview shows pages 1–17. Sign up to view the full content.

View Full Document Right Arrow Icon
Stages of Prenatal Development   1. 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.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2. The Embryonic Period Week 3-8  Embryo grows/Placenta develops Main organs appear Sexual Differentiation
Background image of page 2
One month
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Two months
Background image of page 4
3. The Fetal Period From week 9   birth Resembles human form Major systems/specialized functions Viable at 6 months.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Three months
Background image of page 6
Four months
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Neurobiology of Development   Basic  Vertebrate  Nervous  System
Background image of page 8
  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
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
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
Background image of page 10
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
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
Background image of page 12
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
  Origins of Neurons and Glia Neural Stem Cell-  gives rise to neurons and glia line the neural tube Has potential for self-renewal Ventricular Zone Lining of stem cells surrounding ventricles in adults Progenitor Cell Precursor cell derived from a stem cell; it migrates and  produces a neuron or glial cell Neuroblast (nondividing) Glioblast (nondividing)
Background image of page 14
Background image of page 15

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
become? Chemical signal
Background image of page 16
Image of page 17
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 06/09/2011 for the course PSYCH 180 taught by Professor Ziegler during the Spring '10 term at CUNY Hunter.

Page1 / 38

06 - Brain development - StagesofPrenatalDevelopment...

This preview shows document pages 1 - 17. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online