Neurobiology

Glia-Schwann cells(PNS only)

Macroglial :

1. Astrocytes: provide structural support, maintains ion balance, surround blood vessels (BBB),

   1. Reactive astrocytes: go to damaged/injury to proliferate and repair

   2. Protoplasmic astrocytes: occur in gray matter (delicate w/ many branches)

   3. Fibrous astrocytes: Surround BBB, occur in white matter, cover exterior surface of CNS (more fibrous and robust)

2. Oligodendrocytes: Predominate in white matter

   1. Extend multiple arms to myelinated multiple axons within the CNS

   2. PNS—>Schwann cells

   3. Myelin is the fatty layer that increases velocity of action potential

3. Micro glial Cells

   1. Scavengers

   2. Neural regeneration/Repair