PSYCH261 Chapter Notes - Chapter 4.2: Pathfinding, Neural Development, Synaptogenesis
11 Mar 2019
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Psych 261 - module 4. 2 - development of the brain. Processes in the development of neurons: proliferation, migration, differentiation, myelination, and synaptogenesis. Proliferation: production of new cells cells lining the ventricles of the brain divide while developing some cells remain where they are as stem cells (undifferentiated cells that divide and produce daughter cells that develop more specialized properties) Others become primitive neurons and glia that migrate to other location. Migration: some primitive cells migrate faster than others while few reach destination in adulthood chemicals: immunoglobulins and chemokines = guide neuron migration. Differentiation: gradually, neurons forms its axon and dendrites to differentiate itself while axons grow near its target. Myelination: process where glia produce insulating fatty sheaths that accelerate transmission in many vertebrate axons. Myelin forms first in spinal cord then in hindbrain, midbrain, forebrain. When impaired = produces experience of social isolation continues through adolescence and early adulthood and beyond.
