PSY 359 Lecture Notes - Lecture 5: Recapitulation Theory, Raphe Nuclei, Neural Tube Defect
27 Oct 2016
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Document Summary
Neuroanatomy- the average human brain is about 2% body weight. Human brain has most amount of neurons. Neurons are the message carrying cells in the brain. Neurons are prone to damage that you have to have 10 glial cells for every 1 neuron to take care of that cell. 3 types of glial cells (glial-glue: astroglial- starlight. Put down endfeet along blood vessel to prevent toxins coming out of the blood. Enzymes, pick up toxins, give back growth factors, regulate glucose/potassium: oligodendroglial- related to dendrites. The function is to make myelin: microglial cell- very small. Brain uses microglial cells to fight off any infections or clean up debris after stroke. Innately active ( always active ) and monitored. Develop in each region to support your needs. Corpus callosum connects the two hemispheres and is white matter. Your brain develops as you need it. About 4-5 weeks this tube develops a specialization. Cells within that tube start moving forward and backward.
