PSYB65H3 Chapter Notes - Chapter 13: Abdominal Cavity, Puffy Amiyumi, Birth Weight
Document Summary
Neural plate: patch of cells that are on dorsal surface of the embryo which eventually becomes the nervous system. It forms from the ectoderm of embryo: cells here are stem cells that are pluripotent potential to develop into different types of nervous system cells. Forms groove, forms neural tube, which starts to form ventricles and central canal of spinal cord. During proliferation, ventricular zone rapidly divide and by day 40 there are 3 prominent bumps on the anterior portion of the neural tube forebrain, midbrain, hindbrain. Cells also migrate from interior ventricular zone by following glia. Waves of proliferation and migration develop cns. Deeps layer of neurons develop first and migrate inside out. After migration they grow axon and dendrites. Axons and dendrites must grow toward targets. Brain particularly vulnerable during last 4-5 months of gestation but failures can happen any time. Failure for neural tube to close- craniorachischisis (sadly this is not a typo!!
