HTHSCI 1H06 Lecture Notes - Lecture 8: Cerebrospinal Fluid, Peripheral Nervous System, Central Nervous System
Document Summary
Central nervous system consists of the brain and the spinal cord (extends to the forum magnum in the bottom of the skull) Both systems contain neurons (signaling cells) and glial cells (supporting cells) There are 4x more glial cells supporting neuronal function than there are neurons which are responsible for communication and regulation. Cns is made up of both grey (location of neuronal cells) and white matter (location of axons) Ependymal cells line the inside of the brain; create a barrier between the brain and the cerebral spinal fluid (csf) Astrocytes foot processes that make contact with blood vessels; compose the blood- brain barrier > regulate what reaches the brain from the blood: ex. Neurons responsible for the signaling within the brain: cell bodies are located in grey matter, axons are located in white matter. Microglia monitor and prevent infection inside the cns: immune cells . Oligodendrocytes multiple arms which myelinate multiple axons.
