NROSCI 0081 Lecture Notes - Lecture 2: Carrier System, Schwann Cell, Oligodendrocyte
Document Summary
Cells of the nervous system lecture 2 8/31. Reticular theory: von gerlach; nervous system is one continuous network: popularized camillo golgi. Developed a stain; allowed us to visualize individual neurons. Nervous system = exception to cell theory (cell is most basic unit of structure/organization; all arise from pre-existing cells) Early neuron doctrine: ram n and cajal golgi stai(cid:374)i(cid:374)g a(cid:374)d fou(cid:374)d the(cid:455) (cid:449)ere(cid:374)"t co(cid:374)ti(cid:374)uous i(cid:374) birds, initial basis of neuron doctrine. 1950 electron microscopy: individual neurons in cns and the gaps are synapses. Current neural units, individual cells, each differ in specialization. Dendrites (receive chemical messages from other cells and carry them towards cell body) Axon (projection that carries messages out of body and conveys to other neurons, muscles, or glands) Myelin sheath (fatty layer that protects the cell; insulating layer: mechanisms. Synapse: chemical neurotransmission between a neuron and its target.
