Psychology 3224A/B Lecture Notes - Lecture 1: Anterior Commissure, Septum Pellucidum, Putamen
28 Dec 2015
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Document Summary
Midsagittal section is a sagittal section in between the two hemispheres. Rice crispy size = 2 million neurons. There is individual variation in brains (can be normal to be missing a gyrus) They vary (e. g. , in number of dendrites) Provide structural support and repair of neurons. Usually end in blood vessels or capillaries occasionally neurons. If neurons die, astrocytes will fill in and proliferate in the location of the dead neurons this is called a glial scar: oligodendroglia. Insulate and speed transmission of neurons by forming the myelin sheath. They form myelin by wrapping around the axons. Thickness/speed is determined by the number of times it wraps around. One oligodendroglia will supply 3-50 neurons with myelin. They are the peripheral equivalent oligodendroglia but they are found in the. They perform phagocytosis on damaged neuro tissue. Damaged neuro tissue enlarges microglia they then engulf and ingest the cell debris in the area of damage.
