BIO 203 Lecture Notes - Lecture 10: Brainstem, Cerebrospinal Fluid, Meningitis
13 Jan 2016
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Document Summary
Afferent division somatic sensory, visceral sensory, special sensory: sensory information going into the central nervous system. Efferent division somatic motor, autonomic motor (sympathetic, parasympathetic, enteric: motor information exiting the central nervous system. Astrocyte: maintain chemical environment inactivation of neurotransmitters blood-brain barrier: serve function of degrading neurotransmitters that were released and have come off their receptor, contribute to the formation of blood-brain barrier. Brain is essential impermeable (one of the problems associated w/ delivering drugs to the brain) Oligodendrocyte (cell body and glial processes): myelin formation (schwann cells in pns: extensions that form myelin membrane around axons, certain diseases associated w/ disruption/dysfunction myelin, # axons myelinated less than # axons that are unmyelinated. Microglial cell: scavenger (related to macrophages: only intrinsic cell in brain that serves immunological function, macrophage identifies by receptor mediated recognition. September 29, 2015: meningitis kills you within day or two (regardless viral/bacterial) b/c very hard to get drugs into brain to challenge infection.
