PSYC 2012 Lecture Notes - Lecture 11: Gastrulation, Neuroglia, Blastula
Document Summary
Week 5: developmental neurogenesis, and brain development and environment. Goal: to understand how a structure like our brain is formed and how brain development is. All of these cells have specialized structure and function. It has at least twice as many glial cells. Developmental neurogenesis: the process by which neurons are formed and specialize during development. Zygote: from fertilization to 4 days old. Blastula or blastocyst: hollow ball of cells forms around 4-5 days. Gastrula: 3-layered ball of cells, forms 7-10 days. 3 layers of the gastrula will eventually form different tissues: Ectoderm: outer layer, forms skin and nervous system. Mesoderm: middle layer, forms muscle, blood and bone. Endoderm: inner layer, forms internal organs - lungs, liver, intestines, etc. Neural plate: part of the back ectoderm that forms the neural tube and neural crest by folding in on itself. Neural tube: hollow tube of cells that eventually forms the spinal cord and brain.
